ok i got an 89 HO roller motor in my 83 gt with some minor mods the internals are all stock my question is how much of i shot of nitrous can i run and still be safe i was thinking about a 75 hp shot will that be safe? will more be safe?
A 75 Shot will be a piece of cake in the car. The problem is you getting greedy.....now before you say anything....let me say this. You are going to feel a 75 shot about as much as you feel a highway rock hitting your windshield. I know because i started with a 75 and didn't really feel much of a difference in power till i hit the 125-150 shot range. The stock fuel system should support a 125 no problem, however anything higher i would go with a wet kit, and perhaps a nitrous-only fuel pump. Good Luck! And remember, nitrous doesn't hurt your motor, its the greed that hurts it!
He's right a 75 shot won't do much for you and you'll get bored of it really quick. 125-150 is where it starts to get fun, but with nitrous like anything you're going to want more. Just make sure you have no fuel delivery issues, no pinging, and the motor is sound.. how many miles are on it?
i got 60 grand on this current motor so its not high millage. so you think up to a 125 150 shot will be safe without breaking internals, provided i have no fuel delivery issues
i think you should be safe....i did a 125 shot on a mod motor which is a bit weaker (weaker pistons, that is) than a 5.0 and i went through 20+ bottles. Just make sure you install it correctly, and don't cut any corners.