the compression ratio is 21.5 to one. atmospheric pressure is 14.7#/sf at sea level, or 316 psf, less as the altitude goes higher, i dont know what you would get in death valley but it is below sea level so it would be higher.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.