Thanks, that deck height is about what I worked out as well. My issue was also it's a brand I've never heard of and before. Its the only one I can find with that much dish. My head's are 62cc so my compression should be around 8.43 but I'm not sure to use a brand I've never heard of beforeIf you deck the block down .010" then these may stick out the top a tad. Not a killer problem but the installed height would be .005" below a 'nominal' Magnum block height before any decking.
If you you deck the block to where these are right at deck height at TDC (zero-decked), then your Static CR will be right around 8.1 with a .040" thick head gasket. Looks like a decent choice of dish size for boosting.
Don't worry over the 'stroker' item.... these compression heights are right. I'd worry more about the descriptive hype at the bottom, with the repeated use of the word 'extreme' LOL. I don't know a thing about this company, good, bad, or indifferent.
Thanks for your reply, Your numbers are correct . I am using a .040 gasket but can go thicker. I've been running this engine for a couple of years on 15 PSI with a static compression of 9.3. I'm around 645hp at the wheels on the stock old pistons and one finally let go. It was a great setup but I thought while I'm going forged pistons I will try and drop the compression of it in case I want to go up to 20 psi. I wasn't sure if I could run 20 psi on 9.3 compression. these pistons would give me the compression I won't but I just wasn't sure about the stroker comment and the brandAh OK, I used the wrong combustion chamber volume; your numbers are no doubt right. I now get 8.32 with .050" thick head gaskets.
How much boost are you planning? And will this be ECU controlled fuel injection or carbed?
No reason you cannot grind out some cc's from the chambers, and maybe use tulip-headed valves, all the get more volume. I've ground out 8 cc's from chambers before to set SCR with the desired pistons. (But not SBM's so I can't advise on where the thin spots may be).