E85-Fueled Street/Strip Toyota Supra Defies Altitude with Attitude

850 HP E85 Turbocharged Toyota Supra drag racing

Blood Doping

High static compression ratios and big boost is a proven power-making combination for high-altitude performance builds. With the Supra’s compression upped from 8.5-to-1 to 9.75-to-1, Twiss chose a big Precision Turbo & Engine PT6766 ball-bearing turbocharger to better exploit the built engine. The PT6766 features ball- bearing construction for quicker spooling. The wheel combination provides the flow necessary to make tremendous power in mile-high conditions. To feed the massive T4- framed turbo, Pang Cheung of PFabrications crafted an equal-length tubular manifold. He also constructed the 4-inch downpipe that directs spent gasses leaving the turbine into a custom exhaust finished with a carbon-fiber muffler. On the compressor side, custom intercooler piping channels the air charge into a GReddy 4-row front-mount intercooler for heat exchange. From there, the air makes its way into the cylinders by way of the factory intake manifold.

Precision turbo inside the 850 HP E85 Turbocharged Toyota Supra

Mechanical Metabolism

Dyno graph for 850 HP E85 Turbocharged Toyota SupraSince the Supra’s basic engine parameters (compression, forced induction and fuel type) no longer matched factory specifications, the stock ECU became a poor candidate for engine control. Instead, Twiss opted to install an AEM EMS plug-and-play solution to control fuel, ignition and boost events. He enlisted Servion Tuning’s Jeremy Leisy to fine-tune the fuel and ignition map tables on Revolution Motorsports’ Dyno Dynamics dynamometer. During testing, the E85-fueled 2JZ setup boosted to 32 psi of boost and registered 847 horsepower and 738 lb- ft of torque to the Supra’s rear wheels.

Cross Trainer

CCW wheels 850 HP E85 Turbocharged Toyota SupraAttempting a quarter-mile record with an improper wheel and tire combination is as pointless as trying to sprint with slippers on. To get the Supra’s newfound power to the ground, Twiss mounted a CCW 16- inch drag wheel combination with M&H and Mickey Thompson rubber. This drag-biased combination stays on the car both on and off the track. Twiss remarks, “I roll on these tires to the track, race all day, add a little air at the end and then drive home. This is a true street car and I love being able to enjoy it on both the street and the track.” TEIN coilovers handle suspension duties and are dialed in for enough squat to hook up while still being able to comfortably absorb Denver’s bumpy streets.

Game Time

Twiss’ new setup managed a best pass of 10.6 seconds at 133 mph on a private excursion to Bandimere Speedway. Shortly after, the Supra turned in an impressive 175 mph standing-mile trap speed at the Sand Hills Open Road Challenge. The crowning achievement, however, was Twiss’ win in the USP Street Sport Compact class. At the 2012 IDRC Tuner Mayhem event, he recorded a best elapsed time of 10.712-seconds. Not content with the Supra’s current performance marks, Twiss already has plans in motion to obtain more. “I’m swapping in stiffer wastegate springs to run more boost and I’ll hopefully make a 9-second pass this year. I was also extended an invitation to return for the 2012 Sand Hills Open Road Challenge, where I hope to hit 200 mph this year,” he said. With more power on the horizon, Twiss plans to take his Supra up a notch in his quest for grander achievements and eventually a triple play three-peat.