Ok, let's take a Stock L98/700r4 Setup. '87 SLP 5/8 Headers Flowmaster American Thunder 3 inch Exhaust MSD 6AL Accel Super Coil K&N's Air Foil Spohn SFC's Spohn Adjustable Panhard Rod Spohn Adjustable LCA's TPIS Adjustable Fuel Pressure guage @ 48psi 150 shot of NX Nitrous What would my quarter times be on and off the juice. And, what would my HP and Torque be. again, this is just theory since different IROC's can run different times. The factory truly made some of these cars better than others.

id put you on the back of a flat bed, just kidding, I have no idea, but I don't know if I'd use nos on a almost stock 350. then that flatbed would not be to far away. I blew an engine with a 50 shot once, now I just stay away from the stuff. but that engine had 70k on it already.

Are you kidding... you blew an engine on a 50 shot?? you must have been running way to lean and had way to much timing. A stock L98 is a pretty strong engine, easily handling 350 horsepower plus! In fact, i know a guy who builds these things up and he runs 10's with a stock bottom end. The only thing he changes are the pistons to handle his boost. A 150 shot is more than safe for a stock engine. Do a search on this board, you will see many stock 305's and 350's with hundreds of N2O runs on em.

I already have and most have one thing in common, rebuilds at least once a year. and under enough boost to run even close to 10's he must have changed rods, and some head work. nos is a funny beast, see you can run a crap engine with 500 shot no problem, then one day boom, or you can have a new engine with a 100 shot cook on you. sorry but I like having my car in running condition, if I ever use it again it would be no more then a 25 shot. not to say you can't run it successfully, but I do know my friend spent almost 9k on a 455 big block for his old vette, it made 6 runs on 150 shot, then boom.

Well, give me this... you must have done something wrong then. N2O is just as safe a mod as adding exhaust, but you have to know when to use it. That is why you install safety equipment, like throttle switches, fuel pressure guages, and solonoids to turn off the nitrous if timing or fuel pressure is not adequate. Don't you agree?

you are correct, and the system was working fine. only used on the track. but like all things a engine is only as strong as its weakest parts, so one slight defect and boom, plus my 350 was all stock, and nos is not as safe as adding an exhaust system, they are not even comparable(spelling), one is just bigger pipes and the other is a fireball waiting to happen.

YO, stop scaring me... i am getting juice for my car, and i don't want to blow up my engine, because money is very tight now. Everyone whom i have spoken with, except you, says that if my engine is running good (it has 40,000 miles on it), and if my timing and fuel is fine, ill be fine. This is true, right?

No, NOS is not for stock engines or cast pistons at all. In fact my cousin roasted an LT1 really quick with a 100 hp shot and it was set up professionally, not by him. If you want to use nitrous, build an engine to withstand the punishment, because that is exactly what it is.

D a m n you all!!! Now my car will never beat that goddamn turbo and nos honda POS that kicked my ***!!! Please, someone else reply and tell me it aint so.

What gears do you have in the car. If 2:73s then, I'd say get some 3:42s and higher stall TC and you'll knock a full second off your time.

I have 3.27's in my 9 bolt posi. That full second off would obviously be off the juice, right? If so, that would put me in the High 12's on a great day and low 13's on a bad one, right?

Without the juice and with a 60ft time I'd say high 13's at best. Your really haven't done much to the engine besides exhaust.

I know, that would sound right, but this car ran 13.9@101 with nothing more than the cat back, coil, and sticky's. I figure i should be at 13.4 or so with the headers and the fuel pressure adjusted right. This car is FAST from the factory, very weird for an IROC

ehh... nos is crap... too hard on the motor... if i wanted to go w/ a power adder, id just do a blower... more predictable, ill be it just as dagerous if tuned incorrectly

Don't be so weary of the nitrous... It's not as bad as everyone is making it out to be.
DON'T think its cheap though. It is NOT cheap. (compared to a turbo, and some superchargers yes.. but if you want one of those just save your money, it won't take much longer if you really want them)

Anyway, I dont know how the HELL this guy managed to blow a engine on a 50 shot. Must have been running MAJOR timing and crappy gas. I've ran 3 or so bottles through my ZZ4 (hyper. pistons) at 50-100 shot. The time in my sig was made with a 75 shot with about 600psi (rich)
What you have previously heard is true. If your timing is set correctly I'd say around stock or retarded a couple degrees for a 100 shot, depending on what gas you run. I always run 93.
Oh yeah, while youre at it, grab a laptop and some diagnostic hardware... MONITOR your runs and make sure your A/F is where it should be.

If you have any more questions about basic usage give me an email.



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1988 IrocZ
ZZ4 Crate motor, Stock TPI, 2.77 9 bolt, Exhaust.
12.96 @ 106 with 1.9 60ft 75shot n2o

Hey man, thanks a lot! I will contact you as soon as i have the money to buy the kit. As far is it being expensive... how do you figure. The kit is about 500 and some accessories maybe another 100. Turbo's and blower's require a 2500 + part, plus a built engine right??

Don't do it, you will regret it. The reason so many people say NOS is hard on an engine is because it is. Stock engines with stock pistons hyperteutic or cast will fail after repeated use of nitrous, this is not a toy for stock engines. If you won't believe any of us call up the companies that produce the nitrous setups and ask what they recommend. If in the end you decide to try it then that is your decision, but you will regret it if you care at all about driving your car constantly. Besides, why would we all lie to you about the adverse effects of NOS, its not like we are paying for you car just trying to prevent a mistake and help you out. Good luck!!

I dont regret it.


Nitrous is just like a turbo or supercharger.
It may put a little extra strain on the motor, but unlike a supercharger its not creating boost ALL the time. It's there when you need it.

Insurance.

Guys, thanks for your advice. I am still undecided though. Thank you for your concern for my car