EFI

Returnless fuel systems are becoming more common in new vehicles. As we learned in a recent Jeff Smith Ask Away! column, the increased use is due in part to tightening federal environmental regulations. Does that mean a returnless system is better for your engine than an earlier, return-style setup? It’s an important question to answer, especially

Tuning is rewarding when you want to do it, but aggravating when you have to do it. Today’s self-learning fuel injection systems give us the best of both worlds. The injection units quickly learn what the engine wants to run at its best and offers additional tools for those who like to tinker. Three things had to happen for

Editor’s note: The 1980s was a transition period for engine technology in America. The iconic carburetor gave way to fuel injection. Cubic inches were out, and liter designations marked a new era for engines — one when power and fuel economy were no longer mutually exclusive. This modern engine age has featured some of the best innovation, technology, and performance

It’s been a while since we’ve seen a new aftermarket part capture the attention and interest of so many performance enthusiasts. But that’s been the story of FiTech Fuel Injection since bursting on the scene with high performance throttle body EFI systems priced similarly to carburetors and setting new standards for ease of installation. First,

Does size really matter when it comes to fuel lines? According to the fuel delivery system experts at Fuelab, it does. It’s because fuel line size and length have a direct effect on the amount of fuel pressure drop your fuel system will experience. Too much pressure drop can inhibit the performance of both carbureted and EFI systems

I’m considering swapping a 6.0L truck LS engine into my ’69 Chevy pickup and I’m trying to decide which intake system to use. My engine has the stock plastic, truck intake manifold and injectors but I don’t have a wiring harness or a computer. Would it be cheaper just to buy an intake manifold and

A friend of mine just added an EZ-EFI 2.0 EFI to his big-block Camaro and while it runs great, it has definitely lost much of its old rumpy cam idle characteristics. Is that normal for EFI engines? Why does this happen if the cam has not been changed? D.S. Jeff Smith: This is a really

Check out this video from SEMA where the gang from FAST Electronics tells you about their new FAST EZ LS System, which includes the FAST EZ-EFI 2.0 self-tuning fuel injection system and EZ LS ignition control. They also show you the new 102mm intake manifold, the new big-mouthed LT throttle body, and black fuel rails. After that,

Upgrading your early muscle car’s carburetor for a modern electronic fuel injection system has never been easier and less expensive. In the past, most EFI systems required some knowledge of how to set and adjust fuel and ignition tables from a laptop computer. But new EFI systems like Holley’s Avenger kit, makes it much simpler.

Watch this excellent video to see Hot Rod‘s David Freiburger install a FAST EZ-EFI 2.0 on his 1970 Dodge Super Bee. Freiburger does a fantastic job presenting the information and explaining the choices he makes during installation. You should probably watch this regardless of whether you’re in the market for a new EFI system. Because it’s