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Old 12-18-2012, 01:36 PM   #4237
Scooby Guru
Member#: 261612
Join Date: Oct 2010
Location: Minneapolis, MN
2002 WRX - 750WHP
9.5s @ 150mph


For the 20G XTR I think that is mostly unnecessary. It's already running out of breath up top. Maybe some head porting would help, but raising the rev limiter on it's own won't really get you much, especially on meth (vs E85). I don't know that valves/springs would be worth it. I'd discuss this with a more experienced builder though.
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xluben is offline   Reply With Quote