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Originally Posted by scoobanader
That thread cleared up a lot of my questions. Thanks. So.... now that i know you have to port your wastegate do you think that would be the safest and wises thing to do?
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Yes, to be absolutely sure that boost creep won't kill the engine, porting the wastegate is the only way. It is a safe mod that works. I would definately do it if I planned on tuning the engine that far.
Now as far as who I'd have do it? I'm not sure...I don;t have the tools to do it myself, and I'm not sure who does work like that. I'm sure most engine shops that work on heads could handle it.
As far as the actual spec, I don't think there is an exact spec required. I've seen that people are opening the hole up and polishing the inside of the chamber to help the air flow.
I would take advantage of NASIOC.com and I-Club.com. If you check out the 2.5L forums and use the search, you'll find a ton of discussion, pictures and ideas regarding this subject.
My only real recomendation is...do your homework before deciding, the 2.5L in our cars is a great engine, it can make a ton of power, but make sure you base your decisions on power AND reliabilty.
I'm looking forward to the work you'll do on this car,,it should turn out to be a track beast.
Just a note,, Check out esxmotorsports.com. They built a customer's STi to run track days. It is VERY well sorted in all aspects of suspension, power, brakes and tuning. It has a lot of mods, including turbo upgrades. m I don't think it's on their website, but I checked it out at buttonwillow. You can call them and ask them about "Russ's car". And tell them what you are looking to do.