FAST

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 »

Fast Under Boost: LS Intake Test Part 2

Run with the FAST, the normally aspirated 5.3L also produced 486 HP, but at 6,800 RPM. Torque production was up with the FAST intake, to a peak of 425 lb-ft at 5,000 RPM.

Words & Photos By: Richard Holdener Back in Part 1, we compared a couple of popular intake manifolds on a normally aspirated 5.3L. The FAST LSXR and LSXRT have long been the go-to intake of choice for performance LS applications, but with so many new intakes available, we wanted to see if the FAST design was still a player. More ... Read More »

Fast as Ever: LS Intake Test Part 1

With so many intakes now available for LS applications, is a FAST intake still the hot set up?

Words & Photos By: Richard Holdener For some time now, the LS engine family has been the proverbial hot button of the automotive industry. The LS took the reins from the original small-block Chevy and has never looked back. Even after the introduction of the direct-injected, Gen V LT engine, the LS remained the engine of choice among Chevy enthusiasts, ... Read More »

EZ-EFI Fuel System Still Simple, In Demand

30226-06KIT

New technology often comes and goes, being replaced with the next latest and greatest advancement.  But, Fuel Air Spark Technology’s EZ-EFI Fuel system is an exception. More than eight years after its debut, it continues to be one of the best-selling carb-to-EFI conversion systems on the aftermarket. The system’s popularity stems primarily from its true plug-and-play design and self-tuning capabilities. A ... Read More »

New Life for an Old Deere

New life for an old Deere! David J. Kepner brings FAST EFI to old tractors.

  Custom FAST EFI offers modern performance for classic tractors By: Brandon Flannery Farmers have long been admired for their ingenuity. When 75-year-old David J. Kepner wanted his vintage John Deere tractor to run as well as his pickup, he wondered why he couldn’t use fuel injection. After devising a solution, the retired John Deere mechanic worked with the staff ... Read More »

Maximize HP with FAST interchangeable runners

runner vid

In this latest video from Fuel Air Spark Technology, learn how new interchangeable runners for the LSXR and LSXRT 102mm manifolds can boost horsepower by 20 to 35 over original. Read More »