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Twin Turbo Mustang GT 500 - Compound Rapture - GT500 Twin-Turbo
Hellion's Turbos And Shelby's Blowers Are A Match Made In Horsepower Heaven
It's pretty much impossible to argue against the notion that innovation and Mustangs have enjoyed a hand-in-glove relationship for almost 30 years. As 'Stangs continue to evolve--from the EFI Fox-bodies that started the late-model phenomenon in the middle '80s to the S197s of today--aftermarket manufacturers are still developing products that are taking 'Stangs deeper and deeper into the high-performance stratosphere.
Hellion Power Systems of Albuquerque, New Mexico, is one of those companies. Led by multi-time NMRA Super Street Outlaw champion John "Do Work, Son!" Urist, Hellion has been considered a major force in the development of bolt-on turbocharger systems for late-model 'Stangs since entering the aftermarket back in 2000.
As a street-'Stang-enthusiast-turned-racing-champion, John knows all about the importance of "boulevard cred," and thus has focused his business on conceptualizing turbo systems that make big steam in cars that see daily usage more so than building setups for NMRA participants or other full-on race Mustangs.
The "Hell Raiser" system was Hellion's initial foray into the world of compound boost (turbos that work in conjunction with superchargers) for factory-blown Ponies. Designed for '03-'04 Cobras, the tricked-out turbo system is highlighted by a pair of Turbonetics 66mm units that blow boost directly into a Snake's blower, creating a multiplied air force that makes far more horsepower and torque (at low rpm) than a Terminator's supercharger is capable of making on its own.
Not to be funny, but we were blown away by the Hell Raiser setup when we saw it for the first time (the system was a unanimous "favorite-product-at-SEMA" selection by 5.0&SF's editors in 2006). The system is clean, innovative, and as we've learned from seeing cars that are outfitted with Hell Raisers, capable of taking a Snake's stock engine to the 1,000-rwhp level in a blink of an eye.
We'd never think of Terminators as being old news, but for the last two years, Shelby GT500s have been the hot ticket when it comes to factory-blown Ponies. With John constantly thinking of ways to make more power--even for cars that already have more than 400 rwhp--we knew it was only a matter of time before we'd hear that a compound-boost setup for the '07-present super 'Stangs would be created and available for us to check out.
John gave us the call in late 2008 and confidently described his latest creation as an all-inclusive, totally bolt-in, upgradable, no-cut (save for the OEM catalytic converters, which are eliminated from the exhaust system), no-weld, no-fabricate deal. He guaranteed it would easily put 700 horses at the feet of a stock Shelby GT500 'Stang, using only a pair of Turbonetics 61mm turbos and a GT500's OEM supercharger to get it done.
"The Shelby's blower is a positive-displacement device that basically takes air and makes it `smaller' by compressing it. Boost from our turbos actually help the supercharger compress and move air into the engine. The stock Roots blower really isn't as much of a restriction as people seem to think, and our Shelby GT500 Twin Turbo system proves this. Power under the curve is the big advantage of this system. There's no turbo lag, and compound boost literally can make unusable amounts of power for street GT500s with little effort," says John.
Claims of big-time rear-wheel horsepower coming easily through the addition of a single or combination of power adders certainly can be true. However, they're still the type of boasts that will quickly bury the needle on our "oh, really?!" meter, almost every time we hear them. With that said, we needed to personally satisfy our interest in the compound-boost setup for Shelbys, and, of course, let you all know what's up, right away.