Need help on detonation

See you Sat morning. I have the engine in the jeep with the pistons out and ready to see the damage. The top of the pistons above the top ring are bent upward on several pistons, I am asuming detonation.
 
what were the ring gaps at ?

jameser said:
See you Sat morning. I have the engine in the jeep with the pistons out and ready to see the damage. The top of the pistons above the top ring are bent upward on several pistons, I am asuming detonation.
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Everything is still at Enginecraft, waiting for him to get everything done. Rebuild heads, New pistons, hone, Pistons notched for crank clearance, new rings and bearings. Hopefully wont be to much longer. Ill let you guys know.
 
Everything is back together now. This time running race gas and only 10# of boost for now. I need to get some run time on it and then tune for more boost. Thanks for everyones input.
 
If you need some tunning advice I can help. Let me know.

110 at 10 psi of boost. total timming should be around 21-24 btdc tops. Wanna see the AFR at roughly 11.8-12.1. These are rough starting points. I would tell you to put in a 3928 autolite plug to start or a ngk in a 8 heat range.

If you want to start really conservative 18 total timming at 10psi and afr or 10.5:1. Then use plugs and data from AFr to tune up from there.
 
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