BRING ON THE BOOST
With a larger mill in place, attention shifted to a new turbo setup. A BorgWarner S300SX turbocharger fed by a Full-Race exhaust manifold took its place on the hot side of the head for boost duty. With the boost dialed up to 36 psi by way of a Hallman Manual Boost Controller, Force-Fed’s tuner Babi Berrios went to work on the AEM V1 engine management system to optimize the tune for the new displacement and increased boost levels. Strapped to an AWD Dynojet Dynamometer, Treadway’s EVO was just short of target, producing 775 horsepower and 612 lb-ft torque to the wheels.
NEUTRAL GROUND
Now that the stroked 4G63 generated 775 horsepower to the wheels, attention could shift to suspension enhancements for improved handling. To start, a set of Fortune Auto 500 adjustable coilovers equipped with Swift springs replaced the factory dampers and coils at each corner. With the adjustable coilovers in place, the chassis could be corner balanced and adjusted to a lower ride height while permitting the rebound dampening to be tailored to Treadway’s preference. To help with the EVO’s notorious tendency to understeer, a Hotchkis rear sway bar helps to tighten up the back end, neutralizing this condition and helping the chassis rotate more easily around the turns. AFI adjustable lower control arms offer increased alignment setting for finer suspension tuning.
ENTER THE SWEEPA
When Treadway tested his EVO with its newfound performance, his expectations had been exceeded as he was pressed into his seat the first time. The acceleration and power delivery left little to be desired. Satisfied with his “street sweeper”, Treadway stated, “I’m pleased with how the car came out and I thank Force-Fed for helping me focus on a goal and for guiding me to achieve it. Hindsight is 20/20 and looking back, I could have saved a lot of time and money by building the stroker engine from the start. But I built the car with the budget available at the time and I was ready to listen later on when I met Justin, Babi and Jason. Ultimately, I did it my way, but with some persuasion. The final product delivered all that I wanted for the car. Most importantly, the build led me to forge friendships with a great bunch of guys.” As Treadway prepares for his next deployment, he plans to combat the separation anxiety from his EVO with some hot laps at a local track day.
