ToxicFormula

I was wondering how much nitrous a stock motor with bolt-ons could take before it decides to self-destruct

LT1MAN

iTrader: (6)

maybe a 75 shot.

WhyHelloOfficer

iTrader: (5)

Usually the ragged edge for a factory short block is around 500hp. Yes some people have gotten more, but some people have also blown stuff up with less power as well.

There are quite a few variables that you have to take into consideration. Assuming you have a tune that is spot on (wideband proven) and the safety equipment to go with the nitrous kit (fuel pressure safety switch, window switch, WOT switch, etc.) you could essentially spray a 75 very safely. A 100 is also very plausible on the factory fuel system.

Once you step up to a 150 and 175, you're going to need to upgrade atleast your intank pump. Even then, you're going to need some time on the dyno to make sure you a/f on the bottle is well within safe limits.

If you do all of that, you'll be able to spray your car safely for quite a long time.

LTwonZ

iTrader: (1)

I have a cam, bolt on's, and 225 pump. I have sprayed a 125 shot for the first two years and last year went up to 150 shot with no problems. As long as you have enough fuel and a good tune 125-150 should be alright.

ZFan88

iTrader: (4)

I'll be running a 100 wet shot with stock fuel stuff. I'll upgrade the pump before I go to 150 shot, also retard the timing a couple degrees

ToxicFormula

I've been sprayin the 100 wet quite a bit already. And I've recently upgraded the fuel pump to a 255 so I can spray the 150 jets but I'm not sure how much more I can spray before **** starts going all over the track

WhyHelloOfficer

iTrader: (5)

Well if you're hitting the bottle with slicks -- you might be kissing your rear end goodbye soon.

I'm at the same position as you where I wanted to step up the spray, but wasn't sure where the limit was. The solution I found (personal preference and opinion) I'm leaning towards a 160 or 170 (dialed in on a dyno) with a progressive controller. That way you aren't putting the stress on it all at once with the big hit. This isn't really ideal for a street racing situation, but for the track it can help with traction, and the stress it puts on the powertrain with such a large shot of nitrous.

Some people can get away with a 200 wet shot. There are just a lot of variables. If you take care of the car, have it dialed in correctly, and spray with caution you've probably got a lot of life left in it with the 150 jets.

I've known people with bolt on L89 motors that ran a 200 wet on the car for a full season. He would change the oil after every track day. And it lasted all year. So who knows.

buttermantoast

I have a stock lt1 with 130xxx miles I am running a 150 wet shot been through quite a few bottles no problems so far runs like a donkey.

4thgenz

check my sig. 150 DRY!!! stock EVERYTHING. runs its *** off!!! two full seasons down...one more to go!