[Jay S]

I am not sure exactly which 8VR pistons your running, but if you had it zero decked with those and are wanting to replace them you might be somewhat limited on the replacements because many of the 8VR pistons had shorter compression heights, especially the generic cast pistons. IRC, I have had some that were 1.7 comp height. So some of the replacements will stick out the deck .014+. It might need some sort of forged like a DSS or an autotech versus a speed pro, ross or icon.

Probably might also want to keep in mind the Summit 2801 comes installed at 107 on the ICL, 5 degrees advanced. That 211/221 @ 110 lsa was probably 106 ICL. IMHO, if it had preignition issues with the 211/221 110lsa at 106, the 214/224 112LSA at 107 won’t be much better with the same set up. With the 8VR personally I would stop a 9 SCR with the 2801. If you could run a better piston Probably 9.5 and degree the cam in at 110ICL. I still have a couple engines with that basic cam grind in it, but have used a bunch of them. The most compression I have done was a 10:1 455 Olds with the ICL set at 112. I personally never thought the power gains were worth it to go past 9.5 on any of the engines we have done with that particular cam. Below 9 SCR I leave the cam advance in. My two cents anyway, good luck. Jay