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Old 12-12-2012, 05:43 AM
maxdudy maxdudy is offline
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Originally Posted by brad33478 View Post
fuel was fresh so it must of been timing when i screwed with it. can anyone think of other reasons for this?
I just want to run through all possible causes so it doesnt happen again

thanks for the quick responses
10to 1 compresson would demand premium fule in todays world.
Engine must have been singing to you (pinging/knock).

head design makes alot of difference also. Newer Vortec heads may help because of chamber design but looks like detonnation as stated. Lots of fuel wash indecated by carbon deposits but todays world fuel is very inadiquet for this type of compression. Fuel additives state they may raise octain rating 6 points but in reality it is maybe 1 point at best.