I might Use NEX Nitrous if I can

[john_V63400]

Im thinking of adding Nex Nitrous to my set up. But I want to get some feed back first. I have a 01 GA GT 3400 w/RSM 8psi SC, headers, catback, milzy stage 1 SC cam, 62mm throttle body, ported intake plenum, .030 bore, arias forged pistons. and some

I'm thinking of adding 100 shot, just to get that faster accell from a roll or when I want to race my friends 06 GTO. basically a back up in case I start loosing a race.

My question is what should I use, wet or dry. Is a 100 shot ok. And will it even make my car faster. Or should I even use it at all. And what should I do to my engine to make it handle the nos safely.

[jp_grasshopper_007]

wet
100 shot with the right tune should drop a sec. off your 1/4 mile time

[IsaacHayes]

Wow you have a lot of mods. What quater do you run?

You don't use nitrous out of the hole, you can't spray at low rpms, not 100 shot anyways!!! I wouldn't go with a 100 shot since you already are running boost. That may be too much power, but you have forged pistons, but still... Maybe a 50 shot would be better to start with, 75 if you feel lucky...

Others might know more, this is just what I feel.

[john_V63400]

I have no Idea what my quarter is, I blew 2 stock pistons 3 months ago with my setup, even though RSM states that 8psi of boost is ok for stock engine internals, so I never got a chance to get to the track. I'll be done with my rebuild in about another week or so, hopefully I can tune it right, then I will take it to the track and post my time slip. BTW Ive raced several 14 sec cars and have won with my old set up, such as saturn Ion,Cobalt, 350Z, and lightning. And that was with everthing except the forged pistons and the cam. Im hoping I can make a big difference with the cam and nos. For the record, I baught my car with the sc on it, most of the work was allready done except the forged pistons and cam, it only had 28,000 miles. I put less than 2000 miles on it and the engine blew. The guy before me never raced it, it was just a show car. I believe it was RSM shitty programing.

[IsaacHayes]

How did the pistons fail? Did you chip a hole in them? If so you have detonation and need to get that cleared up first. Forged can withstand it more, but you do not want knock. The cam will help with knock, but you need a good tuner (DHP) so you can scan with it and tune. You NEED a powertuner. I suggest to 1st get it tuned and running perfect. With that cam you'll probably be a lot faster, especailly with a good tune so the computer isn't pulling timing to prevent knock. If you thirst for more I'd go with headers, that will help with knock too. One power adder is pretty good, I don't think you need two. I would be worried about your trans though!!

But do what you want. It's your car.

[john_V63400]

Well thier dishtop pistons and the egde around the pistons were broken off. I'm sure detonation was a problem but im not so bright on how to fix it. What can I do to get rid of detonation, (and did you say the cam would help reduce detonation)

[tejohnson]

Get powrtuner, reduce the timing in the higher cylinder pressures, add more fuel, and put the MAF sensor back into the plumbing. RSM removes it, so your car has no sense of how much boost you see and you only have a 1bar map sensor.

You can also optionally swap in a 2 or 3-bar map sensor...

[IsaacHayes]

Yes, a cam will reduce detonation. If you read the GTP forums (clubgp.com is good) then you can get an idea of how those guys deal with detonation. It's commonly refered to as KR (knock retard) as the computer retards your timing when it detects knock in an effort to save itself. When it does that you also loose power.

If you free up your exhaust flow, and make your engine breathe better, that is the main way to avoid knock. Since you don't have hot exhaust gases left over in the chamber, that's less heat, and less stuff taking up space when the boost comes in. If you have left over gases, then you just compound your pressrure higher. A cam helps the motor breathe so it helps. Boost stacking happens when your motor can't breathe well enough for the psi youre throwing at it. If you open up the motor to breathe, you'll notice that your max PSI drops. This is good because it means you are moving more air out faster, and that means more horsepower, and also less stress on the motor.

Also you want to run colder plugs if you are not doing so already. And a lower temperature thermostat will help as well. If you can do custom stuff, this isn't too hard, but you could try to find a way to put a front mount intercooler and run the charge piping to that and then back to your TB. This would further cool the air and reduce detonation chances, while giving you cooler denser air. Intercoolers help a lot.

If you can put in a 2 bar map and then use a powertuner to add tables for boost (perhaps drag over, or look at tables from a gtp .bin file) that would be the best way to tune as your computer would be able to control everything better. This would take some time and knowledge though.

[JMo60]

in my opinion a 100 shot with a blower is too much for your engine.. im running a 75 shot and shaved almost 2 full seconds off of my NA time.. I am running a 3400 with stg 1 NA cam. if you would go 100 shot you deffinately need to retard your ignition, especially with the boost... I wouldnt run any more than a 50 shot... Be careful, if you already have detonation problems, nitrous detonations are much more intense.. i blew a throttle body to pieces and grenaded my air box...

[IsaacHayes]

lol that's quite an accomplishment! Blowing a TB to peices!!

[JMo60]

blew a throttle body to pieces, plus i have a cute little dent in my hood from the flying debris.. BTW what is NEX nitrous? and if you go to any other forum, just for your own good, dont call it nos... they will laugh and not help you at all...

[blackbombshell95]

blew a throttle body to pieces, plus i have a cute little dent in my hood from the flying debris.. BTW what is NEX nitrous? and if you go to any other forum, just for your own good, dont call it nos... they will laugh and not help you at all...

Fuel puddling in the intake???? Any way to prevent that?

[tejohnson]

blew a throttle body to pieces, plus i have a cute little dent in my hood from the flying debris.. BTW what is NEX nitrous? and if you go to any other forum, just for your own good, dont call it nos... they will laugh and not help you at all...

No, I think they prefer the term "NAWZ"

lol

[Nightingale]

I like the idea of adding an intercooler or water/methanol injection to cool the charge. After that I'd get a smaller pulley and up the boost, and do some tuning.