Bbc 509cid, 9.6 static comp. 050" 230/236, 0.650"/620" Lift, 112lsa roller cam. Iron heads. How much boost I could use? Procharger D1. I was thinking 4psi max, that should make Well over 600hp from 500hp NA base engine.

6-7psi and I'd watch the timing and knock sensors.best would be to get it on a dyno and watch the egt's to,then sneak up on the timing.you may be surprised what 1-2° can net you.

Sounds too good to be True. Ring end gaps and piston to wall clearances are allready In specs for boost. Only concern is ferrea 5000 series valves, maybe fine for mild boost with good tune @ dyno. 7psi would put over 700hp.

yeah,I'd want inconel exhaust valves for sure.

That doesn't sound like a good cam for a steel head Procharged motor to me, but that's just my opinion. Are you running an intercooler ?

My combo is not build for boost, just curious could I add some boost for it. Camshaft is custom grind for NA combo. I still could retard the cam few degrees, but dont know if I want to do that. I have stock bravo drive so I am bushing it even wit out boost. My friend offered good deal of procharger d1. I was thinking something like 4psi without cooler. Intake valve closing point is 63deg atdc, wich makes 7.7 dynamic compression without boost. I was surprised that it is possible to run the procharger In my combo.

Closed chamber or open chamber head?
Squish clearance?
Intake lobe centerline on cam installation??

Open chamber, ICL 106, ECL 118. Squish 0.034"-0.037", depending a cylinder.

Maybe add an intercooler for safety, are you planning to run a thermostat in the engine ?

Closed cooling with thermotat, at first going to dyno the engine as NA and brake it In.