T
Hello, i need some help with diagnosing this piston and what failed. My sled is a 09 iqr with a 2011 pro 800 engine with a 2013 silber journal bearing turbo kit. Has the bullydog controller as well. I just got the sled running and it was running good except i had major over reving and hitting the rev limitor. I put about 30 miles on it just testing it out. I did multiple pulls up to 8300 rpm but couldnt hit it hard because it would over rev. Afr was 12.3 when the piston blew. It almost looks like a cold siesure but i ran it for quite sometime before this happened so it couldnt be that? Water Temp was 125, the tops of the pistons look fine, good wash with no sign of det. The worst side is the intake and then the second pic is the exhaust side. I ordered all the new parts but i wanna figure out why this happened so it dosnt happen again......any ideas???
Thanks!
Thanks!