But yes, what issues led you to want to check compression? And well, it's not that it's usually a small cam, but it does have an intake closing of 63 degrees. Assuming you're at average altitude of 250 feet of elevation in NJ, the figures show with a 7.1 inch rod and a 4.25 inch stroke, and an average of 190 PSI cranking PSI, that if the cam is installed "straight up", you have 11.2:1 compression, on the nose. And even if it's worse case scenario of the cam having been installed four degrees advanced (I would certainly hope someone installing a cam in stroker wouldn't advance it, it's not like it's going to need any more bottom end torque with a 230 @ .050 intake duration!) it would still have 10.8:1 compression. But it can be premium pump (preferably 93 or 94 octane) compatible with efficient closed or heart shaped chambers. I've seen 11.2:1 with the same cam and similar (195) cranking pressure in a 391 stroker 318 with Edelbrock heads, and with enough tuning, it ran well on premium pump 93. What intake, cam, and carburetor will be dependent on what it weighs, and what gear, transmission, and converter, if applicable.
