pd100x Posted January 6, 2023 Report Share Posted January 6, 2023 I have 96 shee and it’s got big bore CT racing pistons in it with 19cc domes and billet coolheaded 34 mm carbs brand new fmf pro circuit pipes I have 210 psi compression out of each cylinder my spark plugs keep coming loose can someone please help m Quote Link to comment Share on other sites More sharing options...
T13 Posted January 6, 2023 Report Share Posted January 6, 2023 Your detonating. You need higher octane fuel, less timing or less compression to stop plugs from backing out Quote Link to comment Share on other sites More sharing options...
Tedder Posted January 6, 2023 Report Share Posted January 6, 2023 Better get to the root of the detonation problem before you tear her up. 1 Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted January 6, 2023 Report Share Posted January 6, 2023 “Keep coming loose.”Probably already caused damage. Quote Link to comment Share on other sites More sharing options...
Tedder Posted January 7, 2023 Report Share Posted January 7, 2023 I keep this in my shop to remind me that lean is mean. This damage was caused from light detonation that was felt right away and throttled out. In addition to what you see of this Hot Rod crank bearing a tiny sliver of the race found its way into the combustion chamber and torn up the piston, dome and nikasil. Quote Link to comment Share on other sites More sharing options...
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