about 60psi
The f22b1 is a great engine for boost it has a compression of 8.8:1 and can handle 12.1:1 so you boost about 11-12lbs. On the stock internals no problem.
You can put a supercharger on a stock engine it depends on how much boost you run wether your engine can handle it or not.
8lbs max, anymore and you better cross your fingers.
Stock turbo can run close to 14 PSI...but you can increase as much as your turbo can. The engine will not last as long with higher boost. Upgrading internals such as pistons, rods, crankshaft, camshaft, and valves can allow much higher boost.
Only about 7 or 8psi safely on a stock motor anymore than that your asking for another motor. Experienced this with 12psi was fun lol and I was impressed with how much it held up to.
7 psi is safe to boost on a stock d-series motor
Stock is around 9psi.
8psi
A 2002 Chevy duramax has 300 horsepower stock
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3.8 inch pulley at 7-8psi
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