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Speed Secrets: FAST Intake Manifolds Short Intake Runner Test

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The LSXR LS3 intake manifold is the result of extensive EFI research and development by Fast, the industry leader in fuel injection aftermarket performance parts. More flow and more power are among the many benefits this incredible intake manifold has to offer, but it doesn’t end there. The really great part about the FAST LSXR LS3 intake is its adjustability ... Read More »

Speed Secrets: Control Your Boost – Cam Swap vs. Pulley Swap!

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Everyone knows that it is very simple to make more power with more boost but how does less boost produce more horsepower? Well, the answer is very logical and actually kind of a simple notion in and of itself. You see, boost is essentially a measurement of restriction and by increasing the flow of an engine you cannot only increase ... Read More »

Valve Spring Tech: Secrets of the Industry Revealed

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  Here’s the valve spring technology breakdown that only top industry experts have known about, until now! With 50 years of race-winning engine building experience, David Vizard hosts episode 4 of Power Tec 10 with the goal to educate race engine builders and the home mechanic engine builder alike on new valve spring tech. Taken at face value, a valve spring ... Read More »

Speed Secrets: Making Easy 350 SBC Power with Vortec Heads!

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Richard Holdener with Speed Secrets has paired up with Comp Cams to showcase some very wild builds over the years. A good portion of which required a fair amount of funding to accomplish, but a decent amount of horsepower gains doesn’t have to break the bank or leave your wallet empty. Starting off with a 350 cubic inch crate engine ... Read More »

Speed Secrets: FAST LSXR 102mm Intake Test!

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How much power are intake manifolds really worth is a commonly asked question. To try his hand at answering this question, Richard Holdener with Speed Secrets teams up with Comp Cams and Fast. The problem with this question is that even though it seems pretty straight forward, it’s really not. The reality is that the power gains from an intake ... Read More »

Speed Secrets: Less Valve Lash = More Horsepower?

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Speed Secrets with Richard Holdener has always had an unrelenting focus on the big parts of engine building, like camshafts, cylinder heads, intake manifold, and so on. However, there is more to achieving the right setup than just choosing the correct big ticket items. In an effort to present the affects the little details have on an engine, Richard turns ... Read More »

Speed Secrets: L82 Small Block Chevy Heads/Cam/Intake Upgrades!

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When picking out cylinder heads to upgrade an engine, in general most people think in terms of flow. However there are many more considerations to be made about such a big decision that can make or “brake” a good engine build. To demonstrate the importance of choosing the right cylinder heads, Richard Holdener teamed up with Comp Cams and RHS ... Read More »

Speed Secrets: Building and Testing a L79 Small Block Chevy

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The specs of the muscle car era engine were pretty standard across the board, but GMs L79 had a legendary reputation. To take a look at what set the L79 apart from the rest, Speed Secrets’ Richard Holdener teamed with Comp Cams to build a reproduction L79. With 4 bolt mains, a forged crankshaft, and 11:1 compression pistons, the main ... Read More »

Speed Secrets: Cam and Nitrous on a Junkyard 4.8! 

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GM’s LS engine has quickly gained a reputation as the ultimate power house and it seems as if everyone is transplanting these engines into everything. While you can buy a well built Crate engine, because of the LS engines potential it can be quite expensive. Lucky for us, GM saw that same potential in the LS engine family and used ... Read More »

Speed Secrets: Camshaft Swapping a Boss 302

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A legendary small block from Ford, the Boss 302 was originally offered only in 1969-1970 Boss 302 Mustangs and the Mercury Cougar Eliminator. In 2007, Ford started offering an engine using the Boss 302 nameplate as a crate engine. Getting your hands on an authentic Boss 302 might be a bit of a task. However, building a replica Boss 302 ... Read More »