CPG Nation Forum

CPG Nation Forum - 5,72,90 http://www.cpgnation.com/forum This is a discussion forum powered by vBulletin. To find out about vBulletin, go to http://www.vbulletin.com/ . hourly 60 1970-01-01T00:00Z en vBulletin 2010-02-09T17:10:57Z http://www.cpgnation.com/forum/images/ca_serenity_red/misc/rss.jpg CPG Nation Forum - 5,72,90 http://www.cpgnation.com/forum RHS® Pro Elite™ SBC 23-Degree CNC-Ported Iron Cylinder Heads http://www.cpgnation.com/forum/rhs-pro-elite-sbc-23-degree-3099-new-post.html http://www.cpgnation.com/forum/attachments/1121-rhs-pro-elite-sbc-23-degree-12326_1-640-.jpg Airflow technology leader extends Pro Elite™ series with new CNC-ported cylinder heads designed to maximize the performance of 360-434c.i. engines ... Airflow technology leader extends Pro Elite™ series with new CNC-ported cylinder heads designed to maximize the performance of 360-434c.i. engines

Engineers at RHS® have recently designed the only Small Block Chevy 23-degree cast iron head for 360-434c.i. engines that is CNC-ported from the factory. The precision accuracy and durability of the RHS® Pro Elite™ SBC 23-Degree CNC-Ported Iron Cylinder Heads are derived not only from the CNC-porting of the intake and exhaust runners but the CNC-ported combustion chamber, as well.

The CNC-ported 240cc intake and 85cc exhaust runners optimize airflow volume and velocity while the 53cc combustion chambers are also CNC-machined to relieve the valve shrouding that occurs when the edge of a valve is in close proximity to the combustion chamber wall. Overall, the full CNC-porting process provides more consistent runners and smoother port-to-chamber transitions, thereby increasing both airflow efficiency and horsepower. In addition, these new heads from RHS® are designed to use offset rockers in order to maximize the intake window at the pushrod opening for increased airflow.

As with the rest of the Pro Elite™ family, these SBC iron heads come with a host of unique features, including premium bronze valve guides and a multi-angle valve job. Also, ductile iron valve seats are inserted to better prevent seat and guide wear with alcohol and other racing fuel applications. The ductile iron 2.100" multi-angle intake and 1.625" radiused exhaust valve seats allow for superior airflow and improved atomization with racing fuels. In addition, the heads feature a refined water jacket for more even water flow to reduce hot spots in the engine. For racing classes that mandate the use of cast iron cylinder heads, RHS® has designed the ultimate advantage by utilizing the latest in airflow technology.

For more information about the RHS® Pro Elite™ SBC 23-Degree CNC-Ported Cylinder Heads or any other RHS® product, call 1-877-776-4323, or go to www.racingheadservice.com.

Quick Summary
Product: RHS® Pro Elite™ SBC 23-Degree CNC-Ported Iron Cylinder Heads
Part Number: #12328 (Straight Plug); #12329 (Angle Plug)

Features & Benefits:
• SBC 23-degree iron cylinder heads for iron-mandated circle track & drag racing classes
• CNC-ported 240cc intake & 85cc exhaust runners
• Ductile iron 2.100" multi-angle intake & 1.625" radius exhaust valve seats
• CNC-ported 53cc combustion chamber relieves valve shrouding & improves airflow efficiency
• Unique features include bronze valve guides, multi-angle valve job, ductile iron valve seats and a refined water jacket

Attached Files

RHS Pro Elite SBC 23-Degree CNC-Ported Iron Cylinder Heads.pdf (88.4 KB)

]]> 2010-02-07T18:16:23Z CPG Marketing RHS New Products New Kid On The Block http://www.cpgnation.com/forum/new-kid-block-2755-new-post.html http://www.cpgnation.com/forum/attachments/1008-new-kid-block-ls-race-block.jpg Drag Racing Online Takes A Close First Look Into The New LS Race Block From RHS® What if small block Chevy diehards had a “small” GM block that... Drag Racing Online Takes A Close First Look Into The New LS Race Block From RHS®

What if small block Chevy diehards had a “small” GM block that had all the benefits engineered into it that the best high-tech aftermarket racing blocks have to offer. What if there was a lightweight cast aluminum block that featured cross-bolted four-bolt mains and non-press fit sleeves, a block with enough clearance in the basic design that a crankshaft with enough stroke to build a 500-inch small block can be installed without any machining or grinding required to make room for it, a block with the camshaft galley moved up in the block also for clearance purposes.

This is what the engineering department at Racing Head Service™ (a division of COMP Cams®) has done with a new aluminum GM LS series block that is now in production.

This front view of a production block shows the cam gallery and the timing chain case.

Developing this new block has been a project that has taken just two years from concept to development. COMP Cams® VP of Engineering Brian Reese and his boss Scooter Brothers are the two guys mainly responsible for the new LS block that you are seeing here. We think it is one of the most exciting products we’ve seen for the GM small block racer in a very long time.

The venerable GM Chevy small block has been massaged in many ways over its more than 50-year history. In the pursuit of more performance the cast iron GM blocks have been given four-bolt main bearing caps. Racers have ground on and machined the original to make it lighter and clearanced it to accept a stroker crankshaft. Deck plates have been added to allow more stroke and engines over 450 cubic inches. GM themselves have improved the block over the years developed the SB2 block and cylinder heads. The aftermarket manufacturers have tooled up to make both cast and billet versions of the Chevy small block.

A few years back GM introduced the LS line of aluminum blocks and cylinder heads that are used to build EFI, small blocks, and now GM cars come of the assembly lines with the LS all-aluminum engine, but these blocks didn’t lend themselves to building and racing “big cubic inch” small blocks that make a lot of horsepower and torque. The new Racing Head Service™ LS block is the answer to those applications and problems.

The primary issues for engine builders with the aftermarket aluminum and steel LS blocks available to them is that while they are improved versions of the factory blocks they retain some limitations of the stock design. Those limitations hamper the LS engine builder who wants to build a really big cubic inch small block.

Aware of this dilemma, the research and development team at RHS® went to work designing and testing several different versions of a GM LS engine block until they developed one that offers many benefits and options for performance engine builders and racing enthusiasts of the LS block.

Story courtesy of Drag Racing Online. For the full story, Click Here...

]]> 2009-10-15T14:16:17Z jbarker RHS Product Articles RHS® LS Aluminum Race Block http://www.cpgnation.com/forum/rhs-ls-aluminum-race-block-2706-new-post.html http://www.cpgnation.com/forum/attachments/982-rhs-ls-aluminum-race-block-ls-block-front-640-.jpg Airflow technology leader introduces a high performance GM LS engine block for radical street & all-out racing applications

GM LS engines have truly set a new standard for V8 performance and durability. However, there are limitations for the aftermarket shopper when it comes to finding a high performance replacement for the factory block. Aware of this dilemma, the research and development team at RHS® went to work designing and testing several different versions of GM LS engine blocks until they found the optimal solution for performance engine builders and racing enthusiasts.

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The LS Race Block is designed for added clearance and mass customization. Available in both standard (9.240”) and tall (9.750”) deck heights with an extra-thick deck surface (.750”), this RHS® block features a raised cam centerline and priority main oiling via an oil galley that is shifted outboard to allow rod clearance for a much larger stroke (4.600”) while also minimizing windage in the crankcase. Using computer-aided design, the cylinder walls are Siamese cast with press-in spun cast iron liners. Cylinder liners are available in both standard deck (5.67”/5.87” – same as the LS7) and tall deck (5.94”/6.38”) lengths. Also featured is a 6-bolt head design with a full water jacket around each cylinder (based on the LS7 design).

For quality control assurance, RHS® performs a CT scan on each block (similar to a medical CAT scan) to maintain maximum casting precision and consistency. Combine all of these features with a superior finish quality, thanks to the RHS® patented Clean Cast Technology™, ultra-precise computer aided design and extra surface material to allow custom machining, and you’ve got a GM block that sets a new benchmark for LS horsepower, torque and durability.

For more information about the RHS® LS Race Block or any other RHS® product, call us at 1-877-776-4323, or visit us online at www.racingheadservice.com.

Quick Summary
Product: RHS® LS Race Block
Part Number: #54900 (9.750” Tall Deck, 4.165” Bore); #54901 (9.750” Tall Deck, 4.125” Bore); #54902 (9.240” Std. Deck, 4.165” Bore); #54903 (9.240” Std. Deck; 4.125” Bore)
Features & Benefits:
• Designed from heavy-duty A357-T6 aluminum material
• Available in standard (9.240”) & tall (9.750”) deck heights with beefy .750” deck thickness
• Accommodates up to 4.6” stroke with standard rod pins (2.100”) & oversized 60mm camshaft
• Raised cam centerline (.388”/9.86mm) to allow larger stroke; 2 extra links in the timing chain
• 4.125”-4.165” Siamese cast bore walls with press-in spun cast iron liner
• Priority main oiling, galley moved outboard for longer stroke clearance & minimal windage
• Dry sump friendly with big front & rear AN-12 side feeds
• GM Gen III/Gen IV compliant with race mounts for Gen I, Gen II, Gen III & Gen IV engines

Learn More Now

]]> 2009-09-24T13:37:42Z CPG Marketing RHS New Products RHS Heads Put To The Test By FordMuscle.com http://www.cpgnation.com/forum/rhs-heads-put-test-fordmuscle-com-2701-new-post.html http://www.cpgnation.com/forum/attachments/979-rhs-heads-put-test-fordmuscle-com-rhsheads_tp.jpg A few years back the FordMuscle.com Forums were buzzing about a new small-block Ford cylinder head out of New Zealand. The company was Pro-Topline... A few years back the FordMuscle.com Forums were buzzing about a new small-block Ford cylinder head out of New Zealand. The company was Pro-Topline and guys in the states were clamoring to get their hands on them. Unfortunately it never materialized because the company went into receivership (what they call bankruptcy down-under) in 2003. The assets were subsequently purchased through a joint venture between Southern Performance Ltd. and Comp Cams. In case you don't know the history, Racing Head Service was a formidable cylinder head manufacturer and race engine building company in the 60's. To expand the business offerings the RHS partners started Competition Cams in the mid '70's. As the new business grew larger, the RHS operation and name was idled. The intent was always to bring the name and reputation back when the timing was right. The Pro-Topline situation became that opportunity.

The New Zealand foundry where the heads are cast is actually a purpose built operation for cylinder heads. Every head is CNC produced on a five-axis Mazak system. In fact, the guy who runs the place knows a thing or two about high-quality foundry operations. He had previously set up a wheel foundry which is the largest offshore supplier of wheels to Ford USA. Combine that level of experience with Comp Cams history of dominance in camshaft and valvetrain technology and you have the makings for what should be a very high-quality and high-performance cylinder head.

Critical Analysis
The point of this article, of course, is to find out just how they stack up.
We got our hands on a pair of their small-block Ford "Pro-Action" 180cc and 215cc heads. (There is also a 200cc available.) All three heads are offered in iron or aluminum with 58cc or 64cc chambers. You also have the option of fully-assembled or bare. A couple of noteworthy comments right off the bat. The RHS website and catalog list the 200 and 215 head as equipped with 2.08" intake valves, while the 180 head is supposed to have 2.02" valves. We're not sure why but our 180 heads also came with 2.08" valves. Secondly, note that these valves sizes will pose a piston to valve clearance problem for the stock-block crowd. You cannot put any of these heads on a 5.0L bottom end without notching the pistons, even with the stock cam. We've discussed this shortcoming in the catalog with Kevin Feeney, RHS's product manager. He agrees on this point and revealed there are plans (albeit long term) to introduce a smaller volume head with more 1.90" valves. Guys, send them a note if you want that and perhaps it'll happen sooner.

Flow Testing with the Pros
We took the heads over to Watson Racing and Engineering LLC. in Concord, CA. Watson Racing is the brainchild of NHRA Pro-Stock racer Ben Watson. Calling it a machine shop doesn't do it justice. This place is 26,000 sq.ft. of pure high-end race engine development. More on this on the next page. Ben, who is busy 24/7 working on the Dewco Pro-Stock GTO, put us in touch with Mike Blackstone, the engine building and cylinder head porting guru. We immediately felt foolish with a set of as-cast heads going on a bench that sees heads with hundreds of hours of Mike's port work. Fortunately for us Mike is a knowledge junkie and was just as interested as we were in how the RHS heads would fare.

Read The Full Article & View Testing Results

]]> 2009-09-18T14:36:39Z CPG Marketing RHS Product Articles <![CDATA[FordMuscle.com Install & Test RHS SBF Cylinder Heads]]> http://www.cpgnation.com/forum/fordmuscle-com-install-test-rhs-sbf-2700-new-post.html http://www.cpgnation.com/forum/attachments/978-fordmuscle-com-install-test-rhs-sbf-heathers66.jpg Article courtesy of FordMuscle.com.

About a year-and-a-half ago we introduced you to a basically stock 1966 Mustang. At that time its' owner Heather was ready to get into some basic power upgrades in the form of a carb and intake swap. However, being novices to the hobby, she was unsure which of the many brands and combinations were right for her car. We thought this resembled the dilemma likely faced by thousands upon thousands of new comers to the hobby. So we teamed up with Heather and her husband to chronicle their progress. At their pace we help them with the next logical modification - both in terms of power but also in terms of their growing mechanical abilities, because they perform all of their own installations. We document all the hurdles and challenges they encounter because we believe it is useful information for many new enthusiasts. After all, in the real world (as opposed to the glossy magazine world) this is how the hobby is playing out in garages everywhere. Not every enthusiast is an expert in the hobby, with deep pockets and a penchant for maximum horsepower.

When we last left Heather's Mustang they had tested a couple of popular 4-bbl intake and carburetor combinations (see My First Intake and Carb Upgrade.) Heather left the dyno quite content with a Weiand Action Plus manifold and Edelbrock Performer 600cfm carburetor. This combo made the best horsepower (171 horsepower and 226 ft.lbs. of torque), and offered trouble free daily-driver operation.

So this set our baseline. She'd been driving the car, trouble-free, for the last 16 months until this summer when the wrenchin' bug bit again. So we suggested it was time to swap out the 289's iron heads and stock cam. They were game.

Next Step: Heads and Cam
For this project we selected RHS™ Pro Action™ Small Block Ford 160cc cylinder heads. These aluminum heads feature 1.94" intake and 1.60" exhaust valves. The 1.94" intake is a new offering from RHS, as some of you may recall they previously only offered a 2.02" valve making it mandatory to clearance stock pistons. The 1.94" valve will bolt right on with stock pistons so long as the cam duration and lift are not too wild. This is good news for amateur hobbyists, heck even experienced ones, who aren't prepared nor comfortable cutting their pistons while in the motor is in the engine bay.

For the camshaft we selected Comp Cams' Xtreme Energy XE256H (part number 32-234-3). This hydraulic flat-tappet cam is mild by most standards, but a decent step up from stock while retaining great idle and yet improving torque. At 212/218 degrees duration and .477/.484 lift we know piston-to-valve interference will not be an issue, and this cam will take advantage of the better flow of the new cylinder heads. The RHS 160's flow in the neighborhood of 260cfm at .500" valve lift (intake) and 180 cfm on the exhaust side.

Read The Full Article at Fordmuscle.com

]]> 2009-09-18T14:20:51Z CPG Marketing RHS Install Articles RHS® Pro Action™ SBC 23-Degree Style Raised Runner Cylinder Heads http://www.cpgnation.com/forum/rhs-pro-action-sbc-23-degree-2546-new-post.html http://www.cpgnation.com/forum/attachments/916-rhs-pro-action-sbc-23-degree-sbc-proaction-23rr-640-.jpg New cylinder head styles from RHS® feature 220cc runner volumes and are available in either “as cast” or P-Port configurations Finding a top... New cylinder head styles from RHS® feature 220cc runner volumes and are available in either “as cast” or P-Port configurations

Finding a top performing cylinder head and still staying within the rules of class competition may be one of the biggest challenges engine builders face today. The RHS® Pro Action™ Small Block Chevrolet 23-Degree Style Raised Runner Cylinder Heads incorporating the “as cast” 220cc runner volume were originally designed for circle track competition, but these are also the “winning ticket” for Nostalgia Drags Junior Class B Fuel competition.

The RHS® Pro Action™ SBC 23-Degree Style Raised Runner Heads are cast iron heads that have been angle milled from the factory to 21-degrees, which significantly improves the performance potential of the head. This cost saving modification is acceptable by most race sanctioning bodies and allows a two-degree plus or minus valve angle change from the stock Small Block Chevy placement. In addition, these heads are available in P-Port versions, which feature added material in all the critical areas so that customers can port the heads to meet their specific requirements. The RHS® Pro Action™ 23-Degree Style Raised Runner Heads are available in three configurations, including the standard “as cast” version with 220cc intake runner port volumes, raised runner P-Ports with seats and guide holes machined and raised runner P-Ports without machined seats or guide holes.

For more information about the RHS® Pro Action™ SBC 23-Degree Style Raised Runner Cylinder Heads or any other RHS® product, call us at 1-877-776-4323, or visit us online at www.racingheadservice.com.

Quick Summary
Product: RHS® Pro Action™ SBC 23-Degree Style Raised Runner Cylinder Heads
Part Number: #12801 (As Cast); #12802 (Machined Seats & Guide Holes); #12803 (Un-machined Seats & Guide Holes)

Features & Benefits:
• Perfect cast iron cylinder head for circle track & nostalgia drag racing applications
• Angle-milled from factory to 21-degree valve angle – allowable by most sanctioning bodies where original valve angle is required
• P-Port versions available to allow custom porting
• P-Port versions available with or without machined seats & guide holes
• Standard “as cast” version features hardened multi-angle 2.080" intake

Tech Resources:
The RHS Difference
RHS Cylinder Head Series Explained
Get Cylinder Head Recommendation

Attached Files

RHS Pro Action SBC 23-Degree Style Raised Runner Cylinder Heads.pdf (59.0 KB)

]]> 2009-07-31T13:42:53Z CPG Marketing RHS New Products RHS® Pro Action™ SBC 14-Degree 235cc Runner Cast Iron Cylinder Heads http://www.cpgnation.com/forum/rhs-pro-action-sbc-14-degree-2541-new-post.html http://www.cpgnation.com/forum/attachments/906-rhs-pro-action-sbc-14-degree-sbc-pro-action-14-235cc-cast New Pro Action™ heads are best performing “as cast” iron heads you can purchase Looking for a cast iron Small Block Chevrolet cylinder head that... New Pro Action™ heads are best performing “as cast” iron heads you can purchase

Looking for a cast iron Small Block Chevrolet cylinder head that delivers race winning performance in a big way? Perfect for both circle track and NHRA Junior Fuel A nostalgia drag racing, RHS® Pro Action™ SBC 14-Degree 235cc Runner Cast Iron Cylinder Heads offer the largest volume runner of any SBC iron cylinder head on the market at 235cc with the capability to be sized as large as 285cc. That combined with the rolled valve angle, high port intake opening and offset valve location provide the most airflow potential of any competitive performance cylinder head. And with this much airflow possible, there is potential for enormous power gains!

The RHS® Pro Action™ SBC 14-Degree 235cc Runner Cast Iron Cylinder Heads use the flatter piston to valve angle configuration to their advantage by netting a 42-47cc combustion chamber to generate a high compression condition without the need for a raised piston dome. In addition, the high port intake runner location improves the straight-through nature of the port for better airflow. Additional material has also been added to critical areas within the head to allow for additional port customization and increased resistance to cracking. The RHS® Pro Action™ SBC 14-Degree 235cc Runner Cast Iron Cylinder Heads are available in three configurations, including the standard “as cast” version with 235cc intake runner port volume, runner P-Port with seats and guide holes machined (parts not included), and runner P-Port without machined seats or guide holes. For more information about the RHS® Pro Action™ SBC 14-Degree 235cc Runner Cast Iron Cylinder Heads or any other RHS® product, call us at 1-877-776-4323, or visit us online at www.racingheadservice.com.

Quick Summary
Product: RHS® Pro Action™ SBC 14-Degree 235cc Runner Cast Iron Cylinder Heads
Part Number: #12804 (As Cast); #12805 (Machined Seats & Guide Holes); #12806 (Unmachined Seats & Guide Holes) Buy Now

• Designed for use with Small Block Chevy circle track & NHRA Junior Fuel A Class nostalgia drag racing applications
• 235cc intake runner volume capable of 285cc volume sizing
• Features flatter piston-to-valve angle to deliver high compression without the need for a large piston dome
• High intake port runner location provides line of sight to the valve, thereby increasing airflow & horsepower potential

The RHS Cylinder Head Difference
RHS Cylinder Head Series Explained

Attached Files

RHS Pro Action SBC 14-Degree 235cc Runner Cast Iron Cylinder Heads.pdf (67.5 KB)

]]> 2009-07-31T13:07:22Z CPG Marketing RHS New Products <![CDATA[RHS® Offers Premium Valve Train Kits & Components]]> http://www.cpgnation.com/forum/rhs-offers-premium-valve-train-kits-2502-new-post.html http://www.cpgnation.com/forum/attachments/872-rhs-offers-premium-valve-train-kits-rhs-offers-premium-valvetrain-kits-components.pdf With joint R&D efforts, RHS® & COMP Cams® offer the ideal “one-two punch” of advanced cylinder head technology with premium valve train components

Many performance experts will tell you that cylinder heads are only as good as the supporting valve train components matched to them. But what if the cylinder heads and valve train parts were designed together, with each maximizing the horsepower potential of the other? Airflow engineers at RHS® have joined forces with valve train technology leader, COMP Cams®, to discover the optimal cylinder head/valve train combination for each performance application that RHS® serves.

By combining R&D efforts, each product innovation from RHS® is designed with an ideal valve train combination to match. In doing so, racers and street enthusiasts alike will be given maximum horsepower and torque for each specific application – tested rigorously through advanced dyno and Spintron® testing techniques in the COMP Performance Group™ R&D center in Memphis, TN. And in addition to the cylinder head assemblies, RHS® now offers a turn-key solution for replacing valve train components via race-proven “Cylinder Head Assembly Kits.” Both the assemblies and kits are available on the RHS® website at www.racingheadservice.com.

For more information about the RHS® cylinder head assemblies with premium valve train components from COMP Cams® or any other RHS® product, call us toll free at 1-877-776-4323, or visit us online at www.racingheadservice.com.

Quick Summary
Product: RHS® Premium Valve Train Components from COMP Cams®
Part Number: Application Specific Shop Now

Features & Benefits:
• RHS® teamed with COMP Cams® to simultaneously design cylinder heads and matching assembly kits
• Designed to optimize performance potential of each unique RHS® cylinder head
• Enabled extensive testing to maximize performance & durability of each cylinder head/valve train combination
• Valve train components, assembled cylinder heads & turn-key assembly kits available on the RHS® website & catalog

Need RHS® Tech Help

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]]> 2009-06-30T13:21:34Z CPG Marketing RHS New Products RHS-Powered Small Block Ford 454 For IMCA Competition http://www.cpgnation.com/forum/rhs-powered-small-block-ford-454-a-2495-new-post.html http://www.cpgnation.com/forum/attachments/862-rhs-powered-small-block-ford-454-sbf.jpg FordMuscle takes you inside a IMCA Modified Small Block Ford 454 build at TMeyer Inc. As you probably surmised, due to the intensely competitive... FordMuscle takes you inside a IMCA Modified Small Block Ford 454 build at TMeyer Inc.

As you probably surmised, due to the intensely competitive nature of the modified class, engine builds are a closely guarded secret. Not many racers (at least the winning ones anyway) are willing to reveal what goes into their powerplants. Recently Tim Meyer of TMeyer Inc. allowed us to get a rare look at 351W based 454 stroker that he was building for a client. This particular racer has always run 351W based 396 cid strokers in his race car, and this season wanted to up the displacement to 454cid using a new block and kit offered by RPM International.

This engine will be used in this seasons IMCA Modified series - however, not revealed to us was the drivers name, car number or anything else that would allow someone to identify where the engine you see below is going to be run!

RHS Pro Action 215cc Cast Iron Porting

[IMGLFT=Porting iron heads is a laborious task that is quickly becoming a lost
art due to the prevelance of aluminum heads. Consequently you can
expect to pay $1200 to have these RHS 215cc iron ported to the hilt
by TMeyer. The results are well worth it, see below.]http://www.cpgnation.com/filehost/files/8/8_sm.jpg[/IMGLFT][IMGRT=As with most professional cylinder head porters, TMeyer prefers
buying their heads bare and then assembling with hardware and
valvetrain components to match the needs of the motor. These
heads get fitted with fairly common Manley valves and dual-springs
as spec'd by Ultradyne for the chosen cam.]http://www.cpgnation.com/filehost/files/8/10_sm.jpg[/IMGRT]

IMCA Modifieds must run steel (iron) cylinder heads. The spirit of the rule was to clearly keep costs down. At around $996/pr (bare castings), the RHS® ProAction 215cc heads are likely the best bang for the buck in the limited market of aftermarket Ford iron heads. Of course most racers aren't content with an out-of-the-box head so they opt for professional porting and flow optimization. TMeyer Inc. worked the bare RHS® heads to improve flow on both the intake and exhaust sides. The before and after results are shown below.

Dyno Results

At the time of this article Tim Meyer has the assembled Ford 454 loaded on his engine dyno and broken-in. While this engine will run alcohol at the race track, the initial dyno tests were performed with gasoline. The engine belted out over 625 horsepower and 600 ft.lbs. of torque! Tim expects another 20 horsepower increase with alcohol. We'll bring you that dyno result when it becomes available.

READ THE FULL ARTICLE...

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]]> 2009-06-26T22:40:29Z CPG Marketing RHS Product Articles RHS® Releases New Product Catalog http://www.cpgnation.com/forum/rhs-releases-new-product-catalog-2491-new-post.html http://www.cpgnation.com/forum/attachments/858-rhs-releases-new-product-catalog-rhs5-2009x-640-.jpg Airflow technology leader introduces a comprehensive product catalog that includes informative technical information & a cylinder head reference guide

Featuring 48 full color pages of the latest RHS® products with images and application/part number listings, the new RHS® product catalog features the latest in cylinder head and engine block technology coupled with an 8-page cylinder head reference guide insert. The catalog is broken down into distinct sections that cover application-specific products, including engine blocks, cylinder heads, intake manifolds, gaskets, valve train components and much, much more.
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In addition to new product innovations, RHS® also introduces a new line of cylinder head “Parts Kits” that include everything needed to assemble a set of RHS® cylinder heads for your engine block. Along with the new parts kits, the catalog features a highly-informative Frequently Asked Questions (FAQ) section, as well as several other resource sections. Whether you’re a novice performance enthusiast or a cylinder head expert, the new RHS® catalog will give you the most comprehensive guide to cylinder head technology in the industry.

This master guide to RHS® products and supporting information is available in both printed format and as a downloadable PDF on the RHS® website. For more information about the RHS® Product Catalog or any other RHS® product, call us at 1-877-776-4323, or visit us online at www.racingheadservice.com.

View Catalog Now

Quick Summary
Product: RHS® Master Catalog
Part Number: #RHS5-2009

Features & Benefits:
• 48 page, full-color catalog includes: product sections, technical information & cylinder head reference guide
• Includes several resource sections, including FAQ
• User friendly for both airflow experts & beginners
• Available in printed format or online in downloadable PDF format

]]> 2009-06-26T00:04:37Z CPG Marketing RHS New Products RHS™ Pro Torker™ Small Block Chevy Cast Iron Cylinder Heads http://www.cpgnation.com/forum/rhs-pro-torker-small-block-chevy-2206-new-post.html http://www.cpgnation.com/forum/attachments/764-rhs-pro-torker-small-block-chevy-12403.jpg Four RHS™ cylinder heads are excellent fit for cast iron cylinder head class racing or rebuilders needing high-quality, reliable heads RHS™ has... Four RHS™ cylinder heads are excellent fit for cast iron cylinder head class racing or rebuilders needing high-quality, reliable heads

RHS™ has built a reputation for creating high-quality cylinder heads that deliver excellent performance. The new RHS™ Pro Torker™ Small Block Chevy Cast Iron Cylinder Heads build on that reputation with four different configurations to fit any need. These heads are the perfect choice for racers who must use OE-style cast iron heads or the production engine rebuilders looking for great performing cylinder heads with guaranteed reliability.

RHS™ Pro Torker™ Small Block Chevy Cast Iron Cylinder Heads are a significant improvement over the OE-style heads with added exhaust face and deck surface to protect against cracking and eliminate heat distortion. The water jackets have been improved to increase water flow for better thermal conductivity and hot spot reduction. Even with all of these improvements, RHS™ Pro Torker™ Heads are machined to strict tolerances and match OE specs for valve angle, intake port size and configuration, as well as combustion chamber design.

For more information about the RHS™ Pro Torker™ Small Block Chevy Cast Iron Cylinder Heads or any other RHS™ product, call us at 1-877-776-4323, or visit us online at www.racingheadservice.com.

Quick Summary
Product: RHS™ Pro Torker™ Small Block Chevy Cast Iron Cylinder Heads
Part Number: #12400 (76cc Chamber, 170cc Runner, 1.940/1.500 Valves); #12401 (76cc Chamber, 170cc Runner, 2.020/1.600 Valves); #12402 (67cc Chamber, 170cc Runner, 1.940/1.500 Valves); #12403, (67cc Chamber, 170cc Runner, 2.020/1.600 Valves)

Features & Benefits:
• SBC premium grade cast iron cylinder heads for OE-style racing or rebuilders looking for reliability
• Water jacket has been redesigned for improved thermal conductivity and hot spot reduction
• Improved casting design to eliminate heat distortion and avoid cracking
• Match OE specs for valve angle, intake port size and configuration, and combustion chamber design

]]> 2009-04-13T02:42:36Z CPG Marketing RHS New Products RHS® Pro Elite™ Small Block Ford CNC-Ported Aluminum Cylinder Heads http://www.cpgnation.com/forum/rhs-pro-elite-small-block-ford-2137-new-post.html http://www.cpgnation.com/forum/attachments/689-rhs-pro-elite-small-block-ford-35020-640-.jpg RHS® introduces new cylinder heads that give Small Block Ford racers the benefits of professional CNC-porting – straight from the factory Custom... RHS® introduces new cylinder heads that give Small Block Ford racers the benefits of professional CNC-porting – straight from the factory

Custom machine work and other horsepower-gaining cylinder head modifications can cost racers both time and money, which is why airflow engineers at RHS® decided to address the issue. Designed for Small Block Ford circle track and drag racing applications (289, 302 & 351 Windsor), the new Pro Elite™ 20-Degree Aluminum Heads feature CNC-ported intake and exhaust runners. The 62cc combustion chambers are also CNC-ported to relieve valve shrouding commonly found in “as cast” combustion chambers.

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To add up to 5 % more flow right out of the box, these Pro Elite™ heads also feature hardened multi-angle intake and radiused exhaust valve seats. And prior to CNC-porting, the heads are built using RHS® exclusive Clean Cast Technology™ to provide smoother port-to-chamber transitions. The thick deck surface allows angle milling and provides increased rigidity to improve head gasket retention in boosted and nitrous applications. In addition to these power-enabling features, the refined water jacket of these heads reduces “hot spots” in both the engine and the cylinder heads themselves.

The Pro Elite™ SBF heads offer a choice of two different intake runner sizes – 205cc or 221cc – both with 79cc exhaust runners. The 205cc option comes with 2.055” intake/1.600” exhaust valves, while the 221cc option uses larger 2.080” intake/1.625” exhaust valve diameters. Regardless of which option you choose, the RHS® Pro Elite™ SBF 20-Degree CNC-Ported Aluminum Cylinder Heads are designed from the latest in Ford-specific airflow technology for optimal volume, atomization and velocity, giving you the power advantage at the track. For more information about the RHS® Pro Elite™ SBF 20-Degree CNC-Ported Aluminum Cylinder Heads or any other RHS® product, call us toll-free at 1-877-776-4323, or visit us online at www.racingheadservice.com.

Quick Summary
Product: RHS® Pro Elite™ SBF 20-Degree CNC-Ported Aluminum Cylinder Heads
Part Number: #35020 (205cc Runner, 2.055”/1.600 Valves); #35025 (221cc Runner, 2.080”/1.625” Valves)

Features & Benefits:
• 20-degree aluminum cylinder heads designed for Small Block Ford 289, 302 & 351W drag & circle track racing applications
• CNC-ported 205cc/221cc intake & 79cc exhaust runners
• Multi-angle intake & radiused exhaust seats for superior flow & increased horsepower
• CNC-ported combustion chamber moderates valve shrouding & improves airflow efficiency
• Thick deck surface allows angle milling & increased rigidity; improves head gasket retention

Visit RHS® Online Store

]]> 2009-03-11T00:25:28Z CPG Marketing RHS New Products RHS™ Pro Elite™ SBC 23-Degree CNC-Ported Iron Cylinder Heads http://www.cpgnation.com/forum/rhs-pro-elite-sbc-23-degree-2124-new-post.html http://www.cpgnation.com/forum/attachments/676-rhs-pro-elite-sbc-23-degree-12326_2-640-.jpg New SBC 228cc runner heads from RHS™ provide maximum airflow for circle track & drag racing classes that require the use of cast iron cylinder heads

Engineers at RHS™ have recently designed the only Small Block Chevy 23-degree cast iron head that is CNC-ported from the factory. The precision accuracy and durability of the RHS™ Pro Elite™ SBC 23-Degree CNC-Ported Iron Cylinder Heads are derived not only from the precision CNC-porting of the intake and exhaust runners but the CNC-ported combustion chamber, as well.

Before CNC machining even occurs, these revolutionary cylinder heads are designed using the RHS™ exclusive Clean Cast™ Technology to deliver superior port-to-chamber transitions for greater airflow. The CNC-ported 228cc intake and 82cc exhaust runners optimize volume, atomization and velocity while the 69cc combustion chambers are CNC-ported to relieve valve shrouding that occurs in “as cast” chambers when the edge of a valve is in close proximity to the combustion chamber wall. By CNC-machining the combustion chamber, RHS™ was able to improve the airflow efficiency of the cylinder heads.

The 2.055” multi angle intake and 1.600” radiused exhaust valve seats allow for superior airflow, thereby significantly increasing horsepower. In addition, these 23-degree SBC heads feature a refined water jacket for more even water flow to reduce engine “hot spots” and an extra-thick deck to allow angle milling. The thick deck surface also improves head gasket retention in boosted and nitrous applications. For racing classes that mandate cast iron head use, RHS™ has designed a race-winning cast iron head that utilizes the latest in cylinder head technology.

For more information about the RHS™ Pro Elite™ SBC 23-Degree CNC-Ported Iron Cylinder Heads or any other RHS™ product, call us at 1-877-776-4323, or visit us online at www.racingheadservice.com.

Quick Summary
Product: RHS™ Pro Elite™ SBC 23-Degree CNC-Ported Iron Cylinder Heads
Part Number: #12326 (Straight Plug); #12327 (Angle Plug)

Features & Benefits:
• SBC 23-degree iron cylinder heads for iron-mandated circle track & drag racing
• CNC-ported 228cc intake & 82cc exhaust runners
• 2.055” multi-angle intake & 1.600” radius exhaust seats
• CNC-ported 69cc combustion chamber relieves valve shrouding & improves airflow efficiency

Visit RHS™ Online Store

]]> 2009-03-05T16:07:10Z CPG Marketing RHS New Products RHS™ Indy 360 X Cylinder Heads http://www.cpgnation.com/forum/rhs-indy-360-x-cylinder-heads-2101-new-post.html http://www.cpgnation.com/forum/attachments/654-rhs-indy-360-x-cylinder-heads-20301-640-.jpg RHS™ airflow specialists team up with Chrysler experts at Indy Cylinder Head to develop powerful cast iron replacement head for Small Block LA & Magnum applications

Thanks to the combined efforts of RHS™ and Indy Cylinder Heads, Mopar enthusiasts will finally get the performance small block head they deserve. A cast iron replacement, the RHS™ Indy 360 X Head series is designed for both Small Block LA and Magnum applications (318-360-415cid). With a host of additions and improvements over the factory originals, these heads are an easy way to get 400 to 550 horsepower out of your Mopar-powered street machine.

Features of these impressive heads include 179cc intake and 67cc exhaust runners, a 62cc combustion chamber, hardened multi-angle intake and radiused exhaust valve seats, an improved valve guide design and a highly efficient water jacket to prevent engine hot spots. The RHS™ Indy 360 X Cylinder Heads also come with an extra thick deck surface to enable angle milling for compression. The 360 X series is divided into two sub-series: the LA-X for Chrysler LA-style engines and the MA-X for Magnum applications.

The LA-X head uses the standard intake manifold and rocker shaft. It is drilled for the proper valve cover and gasket and contains both Chrysler LA and Magnum accessory holes on both ends of the head. Designed for use with the Magnum intake manifold, rocker arms, and valve covers, the MA-X head is the second option of the RHS™ Indy 360 X series and features a Magnum pedestal that is large enough to enable 7/16”-14 drilling and tapping for use with stud-mounted rocker arms and guide plates. Both sub-series are designed for use with 8mm intake (1.92” diameter) and exhaust valves (1.625” diameter).

For more information about the RHS™ Indy 360 X Cylinder Heads or any other RHS™ product, call us at 1-877-776-4323, or visit us online at www.racingheadservice.com.

Quick Summary
Product: RHS™ Indy 360 X Cylinder Heads
Part Number: #20300 (MA-X); #20301(LA-X)

Features & Benefits:
• Performance heads available for both Small Block Chrysler LA & Magnum engine applications
• 179cc intake/67cc exhaust runners & 62cc combustion chambers
• Hardened multi-angle intake (1.92” dia.) & radiused exhaust (1.625” dia.) valve seats
• Dual pattern exhaust bolts (standard & W2) & improved valve guide design
• Highly efficient water jacket with extra thick deck faces

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]]> 2009-02-13T15:59:34Z CPG Marketing RHS New Products