Can you do that without replacing all the internals. I am prob buying a 91 GTA in the next couple of weeks with a 305 and want to know how long would it last supercharged. What needs to be replaced if anything? Whats a safe amount of psi to run? How much power roughly do you gain with each psi turned up? Any help would be appreiceiated.

 

how many miles?

 

160,XXX kms , but most of them are highway miles...

 

around 100,xxx miles right? i'd say if the motor is in good shape (no blowby, not leakind like a siff, no knocks) then you should be alright. replacing engine parts is never a bad idea. seals, springs, cams, and stuff like that wears out. try to replace whatever you can (as far as money will go ) and put a charger on it. prolly keep boost down to 6 or 7, not sure though. as far power per boost, depends. cam, heads, compression, intercooled. too much to guess. shoot out some more specs. (ie: model of blower)

 

A little more info would be nice yes. But as far as the amount of boost goes if you follow what nitrobreth said and check for leaks and knocks I dont see any reason not to run 9 lbs at your 9.3:1 compression ratio.

just my .02

 

Can you get a supercharger small enough to fit under the stock hood?

What kind/series of super charger would be goodfor a 305 TPI, auto. Ask any questions at all if you need more details. It already got flowmasters, and headers and a few other mods.

BTW; i'm making my offer on the car tomorrow, so wish me luck!!