What octane fuel is he running with 230-240 psi?I've got a good friend and customer who builds lots of winning SBC dirt track engines. He always uses a software program to predict the cranking pressure, then verifies it after break-in. He says the software is always within 10psi and a very good "double check" that everything is correct. I don't know what software he's using, but I will find out if anyone's interested. According to him, he has the best luck with 230-240 psi on high compression combos (over 13:1), and shoots for that number when selecting and installing a camshaft. His experience is that engines over 240 get very picky on the tune-up, and under 230 he's leaving something on the table.
I know this is not a drag race application, and a broad torque range is required to pull the car out of the corner. But hopefully you can learn something from his approach and apply it to your application.