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Old 07-08-2003, 12:10 PM   #2
Scooby Specialist
Member#: 37731
Join Date: Jun 2003
Default Re: STi Turbo Upgrade / Engine Strength?

Originally posted by Bastard
Anybody know if a turbo upgrade ( I know the turbo is pretty big already) can be done, or if the engine can even handle more boost? How much do you think the 2.5l can handle without internal modification? Is the new 6spd gearbox built better than the WRX 5 spd? I know when you get about 50hp + in mods on the regular WRX the trans can't really handle that much power.

Just a few questions, and I figure since you guys are actually driving an STi, you'd have a pretty good idea.
actually, the turbo is fairly small. the engine can handle more boost, but like always, you need to tune it to do it safely. im pretty sure (based on pure speculation) that the engine will handle ~450 pretty safely. the trans is a beast, also. wrc racers have swapped out their dog box trannies for the sti 6spd. cant wait till the good stuff comes out (engine management and bigger injectors).
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