Mitsubishi Evo VIII Turbo Upgrades
The "White Rabbit" Turbo Upgrade
White Rabbit is another available turbo upgrade for the Mitsubishi Evolution 8. It retains great streetability, good spool times. Part of the White Rabbit's appeal is the fact that it looks just like the stock turbocharger. The project Evo featured in the pictures was upgraded with the "White Rabbit" system as well as Agency Power fuel rail, Greddy 680cc injectors, ARP head studs, HKS 272 camshafts, Walbro fuel pump and the Xede engine management system, the stock intercooler has been replaced with the TurboXS FMIC and the upper pipes upgraded with GReddy polished hard pipe. Exhaust manifold has been upgraded with DC Sports manifold - the downpipe replaced by the DC Sports catless mated to JIC Magic full titanium JDM-Spec exhaust system. The goal of the buildup is to reach 400 wheel horsepower.
Forced Performance's description of the White Rabbit turbo system taken from website: This turbo is the result of the last 2 years of product development.
Our goal was to produce a bolt-in, stock appearing turbocharger for the
EVO4-8 platform that outperformed the stock turbo.
We went through many prototypes, some pretty poor to be honest, before satisfying our initial design criteria.
The turbo had to spool up like a stock turbo and not give up any bottom end torque. The turbo had to sustain boost in the top end without dropping off, at least enough to maximize power on standard 93 octane fuel.
The White Rabbit is the first level of "bolt in" upgrade turbocharger for the EVO4-8. This turbocharger is not built from a TME. The TME uses the older style "double flapper" 10.5 exhaust housing. The FPWR turbocharger uses the newest "single flapper" revision of the 10.5 housing found only in the 2005 MR. The FPWR provides an advantage over the stock turbocharger without giving up ANY of the boost response of the stock turbo. Retaining stock like spool up was the first priority for this upgrade. The second priority was to deliver additional airflow capacity so that the characteristic top end drop off of the stock turbo was eliminated. These two design constraints were met while at the same time allowing for high boost operation that significantly improves power over the stock turbo at boost pressures above 22psi. Some instances realized a 70+whp increase at 7000rpm compared to the stock turbo.
This sounds easy enough, but it actually turned out to be one of the tougher challanges we have ever faced. Mitsubishi has done a very good job with the stock turbo and identifing the existing shortcomings was not easy work.
It is noteworthy to point out that the addition of our HP wastegate actuator to this turbocharger allows for a level 24-25psi boost pressure throughout the entire RPM range without drop off. The HP actuator is not a standard part of this turbo build since some customers do not utilize alch or meth injection or run race gas.
