BIGONTS Posted October 22, 2012 Report Share Posted October 22, 2012 10mm cub motor is melting o rings on the intake side of the domes of both cylinders after a few hours of duning.tried everything in the book and still no luck.anybody ever had this problem???banshee down:( need help Quote Link to comment Share on other sites More sharing options...
stroked Posted October 23, 2012 Report Share Posted October 23, 2012 Make sure your using viton orings. Sounds like detnation Quote Link to comment Share on other sites More sharing options...
BIGONTS Posted October 24, 2012 Author Report Share Posted October 24, 2012 tried every o ring available,why detonating though?octane,compression,squish,jetting,leak down,timing is good and still no luck.would issues with the crank cause this problem???? Quote Link to comment Share on other sites More sharing options...
WINDYCITYJOHN400 Posted October 24, 2012 Report Share Posted October 24, 2012 Sounds like you need to come put it on the dyno and get that detonation dialed out of it. Quote Link to comment Share on other sites More sharing options...
BIGONTS Posted October 25, 2012 Author Report Share Posted October 25, 2012 who and where ru.im in chicago,windy city??? Quote Link to comment Share on other sites More sharing options...
WINDYCITYJOHN400 Posted October 25, 2012 Report Share Posted October 25, 2012 LOL You already PM ed me remember. I invited you out to dyno but it was a little bit far. In the long run it will end up saving you parts, money and frustration. Plus you will make great power when we're done. ILLINOIS POWERSPORTS Quote Link to comment Share on other sites More sharing options...
Glenyboy Posted October 25, 2012 Report Share Posted October 25, 2012 I wouldn't take it to John he knows jack shit!! I'd use trinity. Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted October 25, 2012 Report Share Posted October 25, 2012 You shouldn't need a dyno to figure out the problem. What are all of your mods, elevation, temp and jetting? Quote Link to comment Share on other sites More sharing options...
WINDYCITYJOHN400 Posted October 25, 2012 Report Share Posted October 25, 2012 LOL. Trinity FTW! YEAH when it comes to experience with blown O-rings.....Trinity is #1. Quote Link to comment Share on other sites More sharing options...
mike0chek Posted October 25, 2012 Report Share Posted October 25, 2012 You shouldn't need a dyno to figure out the problem. What are all of your mods, elevation, temp and jetting? i agree, dyno for this seems over the top. Quote Link to comment Share on other sites More sharing options...
camatv Posted October 25, 2012 Report Share Posted October 25, 2012 if everything is actually right you shouldnt have a problem. sooo you have a problem.. DONT use just any and every o-ring you can get your hands on. use VITON. jet it so rich and back all your timing out of it and see if that helps. if your squish is around .45 its to tight! run more like .50+ if you want it to live. then next time you have it off check the head AND cylinder for warp. make sure you have good studs on it and your fuel/ oil mix is right... i agree you shouldnt need a dyno to fix this issue. might see what the motor is capable of timing/ tuning wise that day in those conditions with a dyno.. Quote Link to comment Share on other sites More sharing options...
J-Madd Posted October 26, 2012 Report Share Posted October 26, 2012 Sounds like an issue with the trueness of the cylinder deck or head. Quote Link to comment Share on other sites More sharing options...
BIGONTS Posted October 26, 2012 Author Report Share Posted October 26, 2012 Im done dealing with trinity!!!! mods are 10mm cub,alcohol,39mm pwk,c.p.i.- b.b.- i.f,new noss head and decked cylinders,billet crank ,v.f.2 reeds,500 ft above sea level,+7 timing etc. Quote Link to comment Share on other sites More sharing options...
mopar1rules Posted November 2, 2012 Report Share Posted November 2, 2012 Are you using a trinity head? If so the problem lies in the squish band angle being negative to the piston crown angle. I had to remachine a set of trinity domes for a guy locally. Trinity sucks!! Quote Link to comment Share on other sites More sharing options...
Machwon Posted November 3, 2012 Report Share Posted November 3, 2012 Talk to your engine builder, head/timing issue/detonation. Does the dyno guy have the gizmo and even if he does can they fix the head if its not timing? Quote Link to comment Share on other sites More sharing options...
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