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Old 12-18-2012, 01:46 PM   #4238
rsutton1223
Scooby Specialist
 
Member#: 280744
Join Date: Apr 2011
Chapter/Region: South East
Location: Alpharetta, GA
Vehicle:
2009 CTSV 6MT 537whp
Black Raven

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Quote:
Originally Posted by xluben View Post
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.
There are benefits to headwork outside of power such as throttle response and overall smoothness of acceleration among other variables.
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