I am buying a motor with these.
Diamond 13.0:1 nitrous pistons with l92 heads 69cc
What will the compession be with my stock "01 lq4 heads?

Thanks.

Also what fuel will I need to run with this compression? If i am correct 11:1 is about the limit for pump gas and I will probably always run 110 seeing is 90% of the time this motor will be on juice. Obviously if needed I will run higher.

 

I think we need more details on the motor. Is it stock stroke? What bore? Piston cc?

If I did it right, (364 with .05 head gasket) it has +15cc pistons Which brings you to 12.4 with 72cc. But for some reason I don't think I did the math right. I have never seen an lsx piston with that big of a dome

 

Sorry.
It is a 408 stroker.

 

Does anyone have a good idea or do I need to post more info?

 

more info