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Old 11-22-2009, 12:34 AM   #17
Scooby Specialist
Member#: 191518
Join Date: Oct 2008
Chapter/Region: SCIC
Location: So Cal
2009 STI Hatch


Originally Posted by noonagon View Post
How do you figure? only difference between the two motors is the dish in the pistons, same rods, same crank, different pistons and different heads. the pistons are the same strangth and the heads just have a different chamber. So basically the same engine but wrx's have a higher compression ratio so in turn can make a bit more power.
I'm running 420whp/430wtq on stock internals on an sti, no problems yet and its 50,000 miles strong.

Your tanny is getting close to failure at that power if you do not drive it properly.
Anytime your car is making over twice its original you are gonna run into some problems. I am a "nooby" so I do not know exactly why you would run into problems but I am sure someone more knowledgeable will chime in and answer your question. Personally if I ever went rotated setup I would look into upgrading pistons/rods and retainers + whatever else my tuner would suggest. I know of 2 3g WRX guys who have blown their motor with a stock location turbo but having low compression in a cylinder...
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