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03-31-2010, 01:59 PM
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#1 |
 ULTIMATE
Drives: 07 Yaris Turbo Join Date: May 2007
Location: Canoga Park, CA
Posts: 14,859
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91 with water/meth injection. Should be able to run 25 psi on pump gas.
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Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific. |
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03-31-2010, 02:23 PM
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#2 | |
 
Drives: Vitz RS Turbo Join Date: Nov 2008
Location: ML
Posts: 577
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Quote:
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03-31-2010, 05:28 PM
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#3 |
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Don't drive it, RALLY it!
Drives: 1999 echo PRC rally car Join Date: Oct 2008
Location: Joyner, Brisbane
Posts: 321
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Stock valve springs are designed to work with the stock rev limit and the stock lift and ramp angles on the cams. If you change any of those, only then do you need to look at a heavier valve spring.
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