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What kind of timing are you guys running on your L92/76 setups with stock bottom ends and 93 octane pump gas.
Timing is far more involved than just the type of head and the fuel used. Since the vast majority of L92/LS3 head users on a LS2 will not want to flycut, the compression will be lower than if you used a bigger cam and ran an 8.7 dcr, you will be able to run more timing than higher compression set-ups. A 232 cam and a 114+2 LSA would be able to run 11.7:1 static compression and not more than 23-24 degrees peak timing. The fastest cars would run more compression and less timing with a big cam. The bigger the cam, the more compression you would need due to the later intake valve closing point. Another factor would be the quench distance. Less quench will run more timing and yet be higher in compression. I have done a few such installs and the lowest compression of 11.1:1 was the same peak timing as the 11.4:1 install and both have 24 degrees peak.
The bottom end, forged or stock makes no difference other than the forged motor would have valve releifs and thus run more compression and likely less peak timing. A higher dynamic compression car will run less timing and yet produce more power through the power band with the same cam.
