Bandit Posted March 2, 2007 Author Report Share Posted March 2, 2007 that lip you see it machined so the piston wont hit. Quote Link to comment Share on other sites More sharing options...
FireHead Posted March 2, 2007 Report Share Posted March 2, 2007 that lip you see it machined so the piston wont hit. Gotcha. I wasn't paying very good attention. I was just looking that the dome. :thumbsup: Quote Link to comment Share on other sites More sharing options...
Bandit Posted March 2, 2007 Author Report Share Posted March 2, 2007 I twisted steel wool in the dome and what appeared to be cracks was gone. But it does look like i have very small pits in it tho. What causes the pits? I have seen pics where domes have pit really bad. Quote Link to comment Share on other sites More sharing options...
ohiobanshee Posted March 2, 2007 Report Share Posted March 2, 2007 Pits are usually caused from detonation. Run a higher octane gas. Detonation will kill a engine. Quote Link to comment Share on other sites More sharing options...
Bandit Posted March 2, 2007 Author Report Share Posted March 2, 2007 its running 110 octane leaded fuel. Quote Link to comment Share on other sites More sharing options...
yamaha04 Posted March 2, 2007 Report Share Posted March 2, 2007 its running 110 octane leaded fuel. could your domes be like that just from lead deposets? since you have your head off check and see is your piston in loose in the cyilender Quote Link to comment Share on other sites More sharing options...
blowit Posted March 3, 2007 Report Share Posted March 3, 2007 could your domes be like that just from lead deposets? since you have your head off check and see is your piston in loose in the cyilender Listen, fi you have pitting on the top of the piston that looks like sand blasting or a similar appearance on the head, you have detonation and like I said, when the motor calls for 110, you use 110. You should have don't a comp test because this would have told me what I already know. The noise your hear is most likely ping and it will kill that motor in short order. The crack looking vanes you saw in the dome are actually fuel additive deposits and do not contribute a problem. These additives do not burn during the combustion process thus they like to stick to things. Those vanes not an indicator of trouble but pits ARE! You can either rechamber that head to displace more or run the better fuel. Actually if you would do a comp test, I can tell you if you can get away with just a 50/50 blend. You might want to check those rings in the piston about now. They like to seize to the piston which is never a good thing. Quote Link to comment Share on other sites More sharing options...
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