Nitrous question

[My68myway]

I just bought a NOS sportsman fogger set up for my car. The motor is a .040 over 350 with a comp magnum 270 cam, headers, intake, 9.375 comp ratio, stock rods, and 4 bolt mains. Nothing radical i know, I had planned on running the nitrous set up on the motor once it got a major overhaul with forged internals etc but i got this system new for a steal. I cant stand just looking at it sitting there anymore. My question is how much nitrous do yall think that motor can take before i have to start worrying about messing anything up?

[Blown353]

If the motor is still somewhat stock-ish and the ring gaps haven't been opened up I'd probably throw no more than 150-175hp at it. It should live a long and happy life at that level with proper fuel & timing.

Heck, earlier this year we took a 1955 283 shortblock that was never gone through, threw a used cam in it, used Vortec heads and an intake on it and sprayed 180hp to it. The car went from 14.3 off the bottle to 10 flat on the bottle going through the traps at 7300 and we ran it nearly 4 dozen passes until we put a 350 in it-- another used "donation" of course!

When we pulled the 283 apart all the bearings looked good but the ring gaps were nearly .085. The valves were lightly tapping the pistons too! We were all waiting for it to grenade and it never did.

[My68myway]

Was that a wet or a dry shot yall used? i still drive this car almost every day so i really dont want to mess anything up, ive only got jets for 150hp and 250hp and i know that the 250 is way to big of a kick in the pants for my motor. my fuel system does need an upgrade before i do anything though because it already drops off alot in the upper rpms and i think thats because of a fuel starvation problem but im not sure but an upgrade in that department sure wont hurt anything.

[Blown353]

Wet shot (carb'd car.)

I have another friend with an 89 Trans Am with an L98 in it that's had a 150 shot on it for over 10 years now; still runs great both on and off the bottle.