FAST

Speed Secrets: Why Air-Fuel Ratio Matters When Tuning

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Working with the experts at FAST, the Speed Secrets crew sets out to get the down and dirty when it comes to tuning, specifically, the air/fuel ratio aspect of it as timing be covered later on.  When expert tuners and engine builders put a car or engine on a dyno to do tuning, they are constantly monitoring air/fuel ratio, but ... Read More »

Speed Secrets: 5.3 LM7 Cam and Intake Test! How good is the TBSS manifold

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What kind of power gains can you get when you upgrade both the camshaft and intake manifold on a 5.3-liter engine? That’s what the team at Speed Secrets set out to find out, working with the experts at COMP Cams. What’s really cool about the experiment on this is, we get to look at the power gains from the combo, ... Read More »

Speed Secrets: Boosted 5.3 Upgrades = BIG POWER!

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The 5.3-liter GM Gen III engine came from humble beginnings as an easy to find engine at any given junkyard (due to its widespread use in GM trucks) as an alternative to an LS1, and now it’s becoming an engine prefer instead of the LSs, especially when it comes to boost. These engines seem to love to be force fed! ... Read More »

Speed Secrets: Everything You Need To Know About Fuel Injectors

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When building an engine, everyone knows that the right head and cam combinations and/or boost can equal big power. With so much focus on the big things, it is easy to over look the basics. The root concepts that make up an internal combustion engine, like air, spark, and fuel. Although, everyone wants to make big power, no-one wants an ... Read More »

Speed Secrets: Understanding Timing For Your Best Tune

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So you’ve done your research and picked out the perfect parts for your application, put it all together, and now all you’ve gotta do is find a way to control the beast. That’s where FAST comes in with their impressive XFI management system. No matter the engine or combination, when it comes to tuning there are really two major elements ... Read More »

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: 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: 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 »