FAST

Speed Secrets: It’s All About E85

It’s All About E85

In this episode of Speed Secrets, Richard Holdener explains everything you need to know about E85, and puts the ethanol fuel blend to the test. Read More »

Speed Secrets: What’s So Great About the FAST LSXR Intake?

Speed Secrets: What’s So Great About the FAST LSXR Intake?

When GM designed the LS1 engine, they didn’t give it an intake to do it justice. Thankfully, FAST came up with a solution. Richard Holdener explains the magic behind the FAST LSXR intake in this episode of Speed Secrets. Read More »

Modern Muscle: Zex-Injected DI L83

Nothing wakes up a new direct-injected, LT-based motor like a little Zex!

 Like anything new, the arrival of the junkyard L83 5.3L at Westech was met with a certain amount of skepticism. Having run endless testing on the previous generation LS engine family with tremendous success, we really didn’t know what to think about the new direct-injected LT motor. The LS was such a huge jump in performance over the previous Gen-2 ... Read More »

Think FAST: XFI Sportsman Test

What was the key to successfully boosting our small block? This XFI Sportsman ECU and throttle body from FAST.

Words and Photos: Richard Holdener Not to knock the venerable carburetor, but we all know that fuel injection is the name of the game. Sure, carburetors have been used to provide air and fuel for millions of automobiles for decades, but there is a reason that all the OEMs have made the switch to modern fuel injection. While carburetors perform ... Read More »

Fuel Fight: Injectors vs Pump

Increasing the power output of just about any motor is a simple matter of adding boost. A supercharged late-model Hemi is a serious performer, but not without enough fuel.

Words and Photos: Richard Holdener When it comes to maximizing performance, there is no better time to be an automotive enthusiast than right now. Not long ago, if you were rolling with 500 hp, you had little to fear out on the mean streets. Time and technology have marched on at such an accelerated rate that 1,000 hp has quickly ... Read More »

Battle of the Sixes: LQ4 vs LY6

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Words and Photos: Richard Holdener  Time, they say, marches on and that is good news for LS enthusiasts. The reason time is important for LS enthusiasts is that as each year goes by we get more and more engines in the wrecking yard to choose from. Not only do we get a fresh supply of motors for the wrecked vehicles, ... Read More »

Is Bigger Always Better: 92 vs 102mm Throttle Body Test

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Words and Photos: Richard Holdener The question on the table today, is bigger really better? The quick answer is almost always yes, especially when it comes to things like throttle bodies. I mean really, doesn’t a larger throttle body flow more than a smaller one (of equal design)? True enough, the larger 102-mm FAST throttle body certainly flowed more than ... Read More »

The Mean Streets: FAST EFI Upgrade

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Words and Photos: Richard Holdener  Losing control is not usually a good thing (okay, maybe once in a while!), but not having full control of the tune on your performance motor is definitely bad. The advent of self-tuning EFI systems has simplified converting a carbureted performance motor to modern fuel injection. These systems, like the EZ-EFI offered by FAST, rely ... Read More »

Displacement vs Back Pressure

After installation of the turbo system on the larger 6.2L, the modified LS3 produced 807 HP and 747 lb-ft of torque. The peak boost pressure on the 6.2L was 6.9 psi, with a peak back pressure reading of 13.8 psi. Bigger motor equals more power equals more back pressure!

Words and Photos: Richard Holdener Unless you have been hiding under a rock for the last decade or two, the hottest thing going right now is the LS engine family. It is hard to believe that it was even possible to replace the original, and wildly successful, Small Block Chevy. After all, the original mouse motor was successful in just ... Read More »

FAST vs Dorman Intake Test

Equipped with the FAST LSXRT intake and Big Mouth throttle body, the 5.3L produced 479.2 HP at 6,800 RPM and 421.6 lb-ft of torque at 4,900 RPM.

Words and Photos: Richard Holdener The internet is great for a number of things, not the least of which is spreading rumors. The information superhighway is certainly king when it comes to getting info out to a vast audience, but therein lies the problem. As efficient as it is at getting info to millions of people almost instantly, it is somewhat ... Read More »