john says horsepower is horsepower, it doesn't matter how it gets there. turbos are easier during the first 60 feet and then it unleashes a shitload of boost and then it's no different from nitrous or blower boost. typically when a block splits, it is at the peak of the horsepower output, wherever that might be RPM-wise.

to john, the compression isn't as important as the overall cylinder pressure. blowers and turbos deliver just as much cylinder pressure as nitrous.

if john was you, he would start at 150 and see how the car reacts to it. john's chevy II was 14:1 with a 250 shot. each motor reacts differently.