30years Posted April 14, 2014 Report Share Posted April 14, 2014 Was hoping someone could help out in describing what has happened in the pictures. Was running in cold weather at the ice drags. I thought I had it tuned in for the cold. Is this typical of detonation? Something else? Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted April 14, 2014 Report Share Posted April 14, 2014 How cold? What was the temperature? Quote Link to comment Share on other sites More sharing options...
BANSHEE HP Posted April 14, 2014 Report Share Posted April 14, 2014 Most of us switch to gas when ice racing Quote Link to comment Share on other sites More sharing options...
RadarRacing Posted April 14, 2014 Report Share Posted April 14, 2014 Looks like detonation damage to me. It also looks like the rings are melted into the piston and then maybe part of the ring is either gone which scarred the piston up or metal of some kind has hit the piston. Either ring piece or crank bearing. There is detonation damage there too from high temps but detonation marks are mostly on the squishband area of dome and piston. You have that plus what looks like ring hitting piston. Detonation causes temps to skyrocket very quickly which probably ended up doing the frint side of the piston where the ring is melted into it. Quote Link to comment Share on other sites More sharing options...
Finch Posted April 14, 2014 Report Share Posted April 14, 2014 looks like one of my pistons! deto and heat like he said ^ 1 Quote Link to comment Share on other sites More sharing options...
camatv Posted April 14, 2014 Report Share Posted April 14, 2014 check the edges of the outsides of the base gasket.. would have been good to do a leak test before tear down BUT it needs to completely come apart. check crank or replace if needed. Quote Link to comment Share on other sites More sharing options...
BUILDER Posted April 14, 2014 Report Share Posted April 14, 2014 Looks like you need to check crank really well to me!! Quote Link to comment Share on other sites More sharing options...
J-Madd Posted April 14, 2014 Report Share Posted April 14, 2014 Crank bearings. Quote Link to comment Share on other sites More sharing options...
30years Posted April 15, 2014 Author Report Share Posted April 15, 2014 It was in the low 20's. I forgot to mention that the plug strap on that cylinder was gone after that last fatal run. The base gasket on that side looked fine. By the way. Anyone have really nice cylinders for sale? Quote Link to comment Share on other sites More sharing options...
Finch Posted April 15, 2014 Report Share Posted April 15, 2014 can get your cyls fixed cheaper then another set would cost Quote Link to comment Share on other sites More sharing options...
30years Posted April 15, 2014 Author Report Share Posted April 15, 2014 Where would you suggest having cylinders replated? I found a place called Kustom Kraft that charges $400 with pistons. Quote Link to comment Share on other sites More sharing options...
uman1030 Posted April 15, 2014 Report Share Posted April 15, 2014 http://www.mt-llc.com/cylservice.php Quote Link to comment Share on other sites More sharing options...
sheerider11 Posted April 15, 2014 Report Share Posted April 15, 2014 Power seal USA http://www.powersealusa.com Quote Link to comment Share on other sites More sharing options...
mailman Posted April 15, 2014 Report Share Posted April 15, 2014 I think an intake, base gasket, or left crank seal is most likely the cause since the right side piston looks fine. This assumes the jetting is the same on both sides. Quote Link to comment Share on other sites More sharing options...
camatv Posted April 16, 2014 Report Share Posted April 16, 2014 millennium.. Quote Link to comment Share on other sites More sharing options...
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