Need help calculating compression ratio
 

Hey guys getting ready to order parts for my build. Broke #7 ringland so now I'm gonna forge the bottom end on my single turbo 2001 ls1. I'm looking at the -3.22 cc flat top wiseco piston with my stock 241 heads and ls9 head gaskets. Does 9.8:1 sound about right on the finished comp ratio? I will be running 91 pump gas with the possibility of meth. Turbo is a 70mm w/.96 ar. Would you recommend the compstar H beam rod or something else? Thanks in advance.

Teach a man to fish and feed him for a lifetime. Google 241 chamber volume, ls9 gasket specs and then compression ratio calculator and plug in the numbers. Good to go.

The big one is also knowing how far above or below the deck the piston is. And I realize it's boosted, but also understanding quench and working with that would be good too.

You probably broke the ring land because your rings butted. Forging everything won't fix that.

Compression Calculator
 

This is what I used.

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