Nitrous on stock motor
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Originally Posted by ToxicFormula
I was wondering how much nitrous a stock motor with bolt-ons could take before it decides to self-destruct
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.
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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.
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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
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Originally Posted by 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
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.