How much boost ?

[steel town]

Hey guy's any ideas on how much boost my friend can run in his 3.8 Ford supercharged V6 on 94 octane this is a street car but he wants to run the most boost he can with just pump gas .The engine is all good aftermarket parts . He has it at 13 rite now can he go more ?

[Monty Mikho]

Keep cranking the boost this the head gasket blows.. Then back off 1 PSI.. :-D This question is probably better asked to the LS-1 / Mod motor guys below...