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Old 08-27-2018, 05:05 PM   #12
Scooby Newbie
Member#: 221439
Join Date: Aug 2009
Chapter/Region: E. Canada
Location: Quebec, Canada
2004 STI


Originally Posted by Homemade WRX View Post
What did you want to know about revving to 9k RPM?

Also, seeing you're on +2mm rods and Manley "8.5:1" pistons, I'm guessing this was actually an EJ257 designed piston, so you're probably more like 8.0:1 if not worse.
Yep pistons are EJ257 with standard pin position. I did not think about lower displacement, you are right I'm probably lower than 8.5. Doing the math give me around 8.1

For 9k, lots of different info from different people. Nobody was able to confirm what tomei high rev springs would get me too before floating with S1 cams. GSC would say to stay under 7500 rpm with these and stock retainer, we got 8k without any issue, just left to know if this will hold. Some says titanium retainers are not as reliable as stock, some say the other way around. I also heard about timing belt issue at these RPM from the OEM tensioner. Oil pump advice was also all over the place. Looks like not a lot of people have done it and shared the info.
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smoky is offline   Reply With Quote