I have a stupid question.
The hydro has a stock stroke 454, maybe bored .030, I have never had it apart yet so I don,t know what exactly is in it.
My cranking pressure is 135 - 150 PSI.
The seller claimed 13:1 CR. It has rectangle, open chamber iron Chevy heads. (I do know this much for sure from when I put the Webster girdle on)
Is it possible to guess at actual CR based on this?? I am thinking that I am wasting cash on racing fuel!