How much nitrous can a 302 take?

[FC_350]

Does anyone have an idea how much nitrous a basicly stock 87-93 HO 302 take? My friends budget is small and he needs max power so nitrous is an easy choice. I'm thinking with the forged pistons it should take 200ish shot hopefully.

[futant]

it will take many 200 shots.
believe it or not a stock block with forged pistons can handle enough spray to reach the block's limit. Although very dangerous with stock rods and crank many ppl have done it with nitrous mules before. It's all in the tuning. I think the highest I have heard is like a 300, but many have done 200 shots for several seasons.

[FC_350]

sweet..thanks

[ARThoMaSVT_5]

yeah.... 302 was made for nitrous... stock bottom end can take most anything you want to throw at it... i sprayed a 200 shot like it was going out of style on a 306 roller with summit rods, stock balanced crank and TRW pistons..

[futant]

yea just don't use hypereutectic pistons. lost 4 of those myself on a 150 shot

[FC_350]

yea just don't use hypereutectic pistons. lost 4 of those myself on a 150 shot

Yeah, I don't have any first hand experience shattering my pistons, but ive read plenty about the effect of nitrous shock wave frequency on hypereutectic pistons. He's planning on using the stock forged pistons that came in the late 80's 5.0 HO's.

On a side note this clown I work with runs nitrous on an engine with hypereutectic pistons. I told him he should be careful, but amazingly he hasent blown his motor up yet, at least not with the nitrous. Now sparkplugs...he has problems with them. A $3000 crate motor later I hope he learned his lesson.

[nastyrx]

i had a 93 302 in my car with a b&m blower and a 175 shot. The 93's had hyperjunks in it,, it lived for 3 years to my and eveyones amazement!,, my last project had a 300 shot on it and lasted all year,, untill the block cracked

[pktrusty]

does anyone know anything? i depends on the compression. Nitrous harder on parts than a turbo. The stress vs strain graph shoots threw the roof since there is nothing gradual about the power. With nitrous comes timing changes. I wouldnt suggest nitrous unless you know how to us it. Or start saving for a rebuild!

[futant]

just to throw this in the mix!

I have read of more than a couple accounts of using stock 10btdc base timing for well over 150 shots. Kinda funny isn't it, but the stock doesn't have a very aggressive curve at all and it seems to be just right.

[Jimbo]

does anyone know anything? i depends on the compression. Nitrous harder on parts than a turbo. The stress vs strain graph shoots threw the roof since there is nothing gradual about the power. With nitrous comes timing changes. I wouldnt suggest nitrous unless you know how to us it. Or start saving for a rebuild!
LOL. The sky is falling.
Nitrous loves compression.
"stress vs strain graph" What do you use to measure that?
I'm fairly certain the thread starter realizes the added pressure on the engine created by higher horsepower levels will shorten its life. Hence the "How much nitrous can a 302 take?" thread we are reading.
What timing you use is a matter of tuning, which is something that should be addressed after any major changes. The addition of nitrous being one.

That said, I would stick with a 150 shot on a stock sb. It'll take the 200, just not for nearly as long. The longer it stays above 500hp the more a stock block wants to split. You'd be better off with a lower plate setup or fogger. If you go nozzle, its generally better to go dry to avoid puddling. I have also seen some pretty trick dry fogger setups that work very well. But of course however you set it up, have the fuel system to match.
Good luck. :thumbsup: