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Product & Installation Articles

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 »

The Trade Parade: 2V Modular Cam Upgrade

One of the most powerful upgrades you can make to your 4.6L 2V is a cam swap.

By Richard Holdener/Photos By Author Now that the 5.0L Coyote has taken center stage, few eyes are fixed on the 1996-2004 Mustangs. Truth be told, the 4.6L two-valve (2V) was introduced way back in 1991 in other Ford vehicles, but it wasn’t until 1996 that it found a home under the hood of America’s favorite pony car. When first introduced, the ... Read More »

Clone Wars: 289 Shelby Stroker

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By Richard Holdener/Photos By Author What looked like a Shelby 289 Ford, was actually a Comp-cammed, stroker ready for some serious action. If you are a Mustang, or even Ford fan, chances are strong that you have heard the name Shelby. An accomplished racer, Mr. Shelby was best known for providing the world with one of the most widely recognized automotive ... Read More »

Still a Float: SBC Stroker Spring Upgrade

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By Richard Holdener/Photos By Author Sometimes performance upgrades come from desire, while others out of sheer necessity. Unfortunately for us, this valve-float (actually control) test was the latter. It is often said that the whole is more important than the sum of its parts, and this is certainly true when it comes to the internal combustion engine. Think about running a ... Read More »

Better With Boost: LS Turbo Cam Swap

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By Richard Holdener/Photos By Author What turbo motor couldn’t use an extra 100 hp or so? Okay people, say it with me, if you want to make your LS more powerful, change the cam. A cam (and springs) should always be the first upgrade you make to any LS motor, as it is the last component that the otherwise perfect factory ... 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 »

All Dialed In: What is Tuning Worth?

Tuning is an important element when looking to maximize the power output of any combination, but what happens if you miss on the tune?

Words and Photos: Richard Holdener When we run tests on intakes, camshafts or cylinder heads, one of the questions we often get is, do you tune each combination? The obvious answer is yes, as tuning each combination to maximize the power output is the only way to know the true difference between them. This becomes even more critical when the ... Read More »

More Than Cams

Think of this stock, rebuilt 302 Ford as a blank canvas, with nothing but power potential!

Words and Photos: Richard Holdener By now, everyone should realize that COMP Cams offers an impressive array of cam grinds for most performance applications. You would be hard-pressed to find an application where they didn’t offer an off-the-shelf cam grind to suit your needs, but they also offer custom grinds for those wanting something special. After the factory adopted them, hydraulic-roller ... Read More »

Attitude Adjustment: Valve Lash for Power

A change in valve lash on a solid flat-tappet (or solid roller) cam can change the attitude of your motor!

Words and Photos: Richard Holdener Whether you have a Ford, Chevy or Dodge, one of the key elements in improving the power output is the right camshaft. The cam is often described as the brain of the internal combustion engine, as it synchronizes the valve events that all but determine the character of the motor. Mild cam timing will obviously ... Read More »

Double Dipping: Supercharged 5.0L Fords

Even on stock 5.0L, nothing adds performance like a little boost!

Words and Photos: Richard Holdener  What could possibly be better than a test where we add a supercharger to a 5.0L Ford? The obvious answer is adding boost to a pair of 5.0L Fords, one stock and one modified, of course! In fact, the great thing about boost from a supercharger is that it will improve the power output of ... Read More »