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Old 12-05-2016, 01:43 PM   #15
duncan351
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Join Date: May 2003
Location: Lewisville,TX
Age: 46
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Quote:
Originally Posted by KAT-PWR View Post
Okay Dunc, good to see you on zilvia.


I'm guessing because cylinder pressures and his continued head light issues?
yea, its really the cylinder pressures and adjusting the timing properly. I finally cured my head lifting issues by using washer inserts. But I detonate on E70 fuel compared to E80 and higher. I have heard so many posts and people say " I run the same boost and timing regardless. It doesn't matter." Maybe because they are all low compression motors. I can only speculate. But for my high compression motor. I had to pull 5* timing out of the motor to keep it from knocking and even then I just stopped at 23psi. Don't feel comfortable trying to push the motor any more on such crappy fuel. Once the summer blend is back. I have no issues with knock. All honesty if I had to do it all over I would have gone 9.5:1. Gives you cushion for knock thresh hold.
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Last edited by duncan351; 12-19-2016 at 05:21 PM..
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