Can you run my numbers they way you are talking about and tell me what you get?

Like I said, I get 9.95:1 and when I get some time tonight I'll post my math to verify. I'm not too concerned with crevice volume at this point.

I guess my other question is what happens at an NHRA event and you have a pull apart your engine after you set a record or something. Does NHRA calculate crevice volume? Do they just drop the piston .500 and do a down fill and calculate the CR?

I have done the down fill for years and for some reason, I'm way off the reservation on this.

Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston