How much spray on cast pistons???? How much is safe

 

Off the top of my head, you can go 100 and be safe, i see no reason why you couldn't go 150, but correct me if I'm wrong, i have sprayed a 305 92 RS for 1 year with a 200 shot, failure was finally due to fuel pump failure, i thought they were cast, but may have been hypers. i am not 100 percent sure.

 

Thats what I though I am probly going to put a 75 shot of spray on it that way I do not comprimise the life of the engine.

 

I ran a .070 jet on my Camaro since day 1, upped to a .073 this last year, going to a .078 next year; this is all on a stock bottom end with a TON of miles. Really the only limiting factor is fuel and pumping losses. I'de do a 250 plate shot on a single plane carb manifold with a stock bottom end, as long as I had the fuel and exhaust system to support it. I've heard that a stock headed small block will limit itself at around a 350hp shot due to the exhaust ports being incapable of flowing the massive ammount of exhaust gas. Massage the exhaust ports, stick 1.6 or 1.65 exhaust valves in with the 1.94 stock intake valves and you should be able to spray ALOT. Finally you'll crack a piston from ring expansion, or collapse a rod but hey it'll be fun while it lasts.

 

is the NOS tbi kit a wet or dry system?

 

i wouldnt go over 125hp kit, if you do go more watch your fuel pressure.