papa_smurf49319 Posted May 30, 2007 Report Share Posted May 30, 2007 Im 853 ft above sea level run 93 octane, how much should i shave my stock head? And will it be noticible, make it heat up any faster, or any other downfalls. Quote Link to comment Share on other sites More sharing options...
Bansh-eman Posted May 30, 2007 Report Share Posted May 30, 2007 you can get away with 20 thousandths most of the time. but the only 100% way to know for sure is a compression test. Quote Link to comment Share on other sites More sharing options...
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