25 Hot EFI Crate Motors- The List

Those of you who read GMHTP religiously know that we've recently published buyers' guides for stroker short-blocks ("Sleeved & Stroked," July/August 2005) as well as cylinder heads ("Gen III/Gen IV Cylinder Head Buyers' Guide," January 2006). While on these last two endeavors we chose to focus solely on components available for the latest two generations of GM's V-8, this time we decided to go all out and cover not only complete engines, but nearly all years of pushrod V-8s as well.

Now don't think we've gone soft here; it's true that most small-block and big-block Chevys never saw anything but a Rochester sitting atop them. But any engine can benefit from modern electronic fuel injection; heck, a very premise of this magazine is that carburetors are a thing of the past. That's why we're only featuring engines here that are EFI-equipped or EFI-ready. For the purposes of this article, "crate engine" means anything between fully assembled long-blocks (nearly everything included except the intake manifold) and complete turn-key engines, some even with wiring harnesses and PCMs to facilitate installation into older musclecars. We've broken down the list into categories as follows: Gen III and Gen IV Small-Block (LS1/LS6/LS2/LS7/etc.); Gen II Small-Block (LT1/LT4/etc.); Gen I Small-Block (L98/TPI/etc.); and Big-Block. Don't consider this a complete listing, as each of these manufacturers has offerings other than those listed here. We've given you a taste of these in the company description as well as the "other packages" line of each company's data file.

So without further ado, make sure your wife is out of the room and get your home equity checkbook out, boys

Auto Worx 650 hp 427 LS2 Big-Bore Long-BlockToronto-based Auto Worx Performance Specialties builds each crate engine to customer specifications, whether the needs be for street, strip, or road course; and for naturally aspirated, nitrous, or blower applications. The company achieves 427 ci on this engine through a re-sleeved LS2 block, bringing bore and stroke identical to that of GM's LS7. Auto Worx builds Gen III- and Gen IV-based crate engines ranging from 346 ci all the way to 447 ci. Other GM crate engines available through Auto Worx Performance Specialties include LT1, TPI, and small- and big-block Chevys.

DragonFire Racing 402ci LS2 Crate MotorDragonFire Racing specializes in turn-key engine packages. This package includes a remote mount wire harness with all necessary connectors and relays, such as fan relays. Other features include a CAN connector to display engine data such as oil pressure, coolant temperature, and oil temperature, which can then be displayed on electronic dashes such as Race Pak and AIM Sport. This kit comes complete with installation and wiring instructions, and is advertised as yielding 595 hp and 540 lb-ft.

FMS 402(6.6L) LS2 Sportsman Long-BlockWith Futral Motorsports, the name of the game is LS1, LS6, LS2, and SBC performance street and race motors from 346 ci all the way to 455 ci. "We have several 800-plus-horsepower LSX/C5R-based engines and have set many records with our engines," the company says. Futral's engines go through a series of meticulous checks for align bore straightness, deck squaring, and clearancing. According to FMS, this 402ci setup has the potential for 560 hp and 510 lb-ft--or more--at the rear wheels with proper components and tuning.

GM Performance Parts LS7 Crate EngineThat's right, GMPP is now offering for your enjoyment the engine out of the already-legendary 2006 Corvette Z06. Personally, I'm imagining this sucker under the hood of a WS-6 Trans Am, but you might have a '69 Camaro or '32 Ford in mind. It's sure to find its home inside many a street machine--so long as the owner has more than a little cash to blow!

HPE 408 Long-BlockHouston-based Horsepower Engineering claims to be "your source for max-effort race engines, with the longevity to last entire seasons dependably." The company has an in-house machine shop operated exclusively by graduates of the School of Automotive Machinists. HPE focuses its engine building efforts entirely on GM late-model performance.