[STI-LOS]

My 2005 STi has lasted me since 05' with no problems. The car has 36,000 miles right now. Its been pro-tuned almost all its life. I am about to go with a bigger turbo and alcohol injection.

I want some good power but I also want my internals to last (rings, pistons, etc.)

I know plenty of people (probably many of you all reading this) push about 17 to 19psi on a daily basis and their motors are fine (at least the 2004 and 2005 years). So how much psi is too much for the internals? 22psi? 25psi? No more than 20psi on the stock block? FYI I'm going with a Green turbo.

Thanks.
-Rick

There is alot of variables with this how you beat your car, is it a tracked car etc, how you have maintaned it.. etc.what kind of power your gonna be pushing.. You have been protuned at what boost?. With the Green your gonna want to run more than 20psi of boost which is totally fine for the stock block. Its all in the tune, you can be tuned for 16psi and have your motor blow you know what I mean its not a boost issue. So what you need to do is talk to your tuner its up to you wether you want a conservative tune or a aggresive tune either way tuned right the motor can take the boost so dont worry about that. If your motor is healthy to begin with, do a compression test before the Turbo swap and get it tuned for your goals and your style of driving and have fun our motors can take it..