how much nitrous is too much

[tim haynes]

ok i have a 2000 pontiac grand prix gt 3.8 na
basicly the same motor .

i notice a lot of camoro people run nitrous this is good. not mant gps run it.

anyways my question is how much nitrous can i run before parts start breaking .i plan on getting forged pistons but dont know how the bottom end will hold up i thoug some of the more experienced people in here could help me with this.

[Dan M]

Great question, lets shoot it over to the N2O folks, eh? Moving this post to the nitrous board!
[img]graemlins/fluffy.gif[/img] (fluffy moves my posts for me)

[12secondv6]

OK, well since this was sent over to us nitrous junkies I deleted the duplicate post :D
How much is too much???
It could be as small as 20 hp or as much as 120?
If the engine is running in poor condition it might grenade w/ a 20 shot.
If it is running in tip top shape and you have a good enough fuel system to support it then maybe 120?
I stayed w/ the 120 hp dry shot for a very long time.
I had kenne bell boost a pump, afpr, reprogrammed computer to help my fuel needs.
85 hp dry (typical level for nos kit 5175) is a 'comfy' or 'safe' level on a good running engine.
Is there a 100% guarentee that the engine will not grenade, nope, it might.
Hell you might even be able to do a 150 hp or even a 175 (wet) shot once down the 1/4 :D
How much is too much is a kinda open ended question :D
I'm a nitrous junkie, I'm never satisfied :D

[tim haynes]

i understand theres no guarantee, i was just saying i was wondering with a motor in good condition if any of you guys have or no of anything breaking under nitrous like rods ,crank , block,etc and at what hp level what shot level i mean.

[southern94]

NEVER there is NEVER too much lol


i am not familur with the grand prix engines but i know on a 3.8 you can run 85-100 shot and be ok and on the 3.4 around 85 this is with stock internals like you stated prob not much help but i tried ;)

[wheeldog63]

since his is a Grand Prix, couldn't he do a little more stock seeing as some of his components are forged? Just my $.02

[mike malloy]

min has been running a 150 shot for over 6 months. the only thing i can think of is that he had that nasty backfire

[pgriffith]

I thought only the GTP grand prix had the forged. He said he has a GT which should be the same L36 in our cars. I have the Nitrou Express Wet kit. I run a 75 shot. I have put only 1 bottle though it and had it for 5 months. I dont use it that much because its winter in utah. With no fuel upgrades and stock motor I feel comfortable with a 75. If I were to upgrade the fuel pump and maybee retard timing I would probly run a 100 shot. But i have had no problems with 75. I am running NGK TR6 spark plugs.

[12secondv6]

GTP's have the stronger internals
GP's don't

[tim haynes]

ok well no forged internals that i know of same motor as u .but i guess no one has broke any internal parts here so u cant help me , i guess ill just start at 75 and go up till something breaks , then ill no the limit.