| For both, if a properly selected cam is in them that will work for pump gas, 160-185 psi.
Or the same #s for a 8:1 motor, or 9:1, for that matter.
It's more important that they are all about the same (within 10psi or so of each other) than what the actual psi is.
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Numquam ponenda est pluralitas sine necessitate.
— William of Ockham, from Quaestiones et decisiones in quattuor libros Sententiarum Petri Lombardi
Roughly paraphrased into modern English, and applied to figuring out what's wrong with your car:
The simplest explanation that fits all the facts is probably the right one. | 
