[SSSoon]

Originally Posted by JOHNSONROD

SSOON, check out that museum thread of mine. how terrible and ironic that both our engines lasted and blew about the same time. my #7 intake spring broke. the valve dropped and it was over from there. i ordered a GMPP crate engine to swap in for the sept 26th four day event at the new track. my block is kinda ok. a lil scoring in #7.

Hey Johnsonrod - I am so sorry that your engine bought it too! Don't have exact cause yet on what caused mine but the OBD device was showing in real time tons of misfires on #5 and #7 as it finally gave. I wonder if valve springs were at fault. Looks like you found a good solution - happy to hear that. Would love to compare builds when we are both done and back at the track. In the end heat soak was an issue for me that I wanted to solve. Remember me saying I could only get to 135 on the back stretch last time we were at VIR? Sucked.

Originally Posted by 1977and2010

Boy does that sound familiar. Mine started with #7 intake spring also, and ended up taking out the whole motor. There have been too many of us losing motors in the last year or so. I went with a forged 415 ci with a medium cam to boost up the torque so I don't have to rev it so high. It really does pull a lot harder now in the lower revs and all the way up. I hope my thinking plays out. Now after blowing all of my play money fixing it, I need to save up so I can get back out on the track. Good luck fellas

#7 again! Holy crap. You're right, it sounds like it is becoming more common lately for road course guys. What kind of engine is your 415? What kind of power and torque does it make?