Windows switch would be the eaisest. I am using the Mallory

 

This post made a lot more sense than your other 2 because you've calmed down. But I am still disagree with your RPM theory. When you hit that button, X amount of nitrous is coming out of the nozzle, plate, etc at a constant velocity (exceptions, progressive controller, dual stage, etc). I'm just using this as an example, say when you hit the button, the nozzle is shooting out 8,000 grams per minute of a nitrous/fuel mixture. 8,000/8 cylinders = 1,000 grams per cylinder per minute. So if you're at 1500 RPMS, each combustion stroke of the cylinder will contain .666 grams of nitrous/fuel from the nozzle. At 3000 RPMS each stroke contains .333 grams of nitrous/fuel. The more grams of nitrous and fuel during combustion, the higher the cylinder pressure. Higher cylinder pressure means more wear on pistons, rings, rods, & crank. Maybe someone will step in and prove one of us wrong. I'm not flaming, but I would like to know who is right.

BTW: Torque x RPM/5252= HP off the top of my head

 

I sure don't want to start an argument. If you are new to N2O you can certainly believe whoever you want! But you can take this to the bank: a given nitrous "shot" will have an effect on cylinder pressure pretty close to inversely proportional to rpm. Period. End of discussion. IOW at 1,500rpm there will be twice the increase in cylinder pressure that there will be at 3,000rpm.

Now, does this mean anything of consequence in a given application? Maybe so and maybe not. If the nitrous shot is relatively small and the car has an automatic with a high stall convertor the cylinder pressures may stay low enough not to break anything. But I would not want to try this theory out with my motor (unless we are talking a 5075hp shot of N2O or something like that).

Make up your own mind and good luck

Rich Krause

 

So I guess you're going against CustomN20's theory then? It sounds like you and me are trying to make the same point. This is just my high school mind working and trying to figure it out. Thanks. Later.

 

The theory could almost sound reasonable, but....its not. If you were to injest more nitrous at 6000rpm then at 3000rpm as you stated, then the system would no longer give you only 100hp. It would increase as the rpms went up. Thats not how it works. Do you know what causes the cylinder pressure? and when it happens? The cylinder pressure isnt created by the amount of liquid nitrous injested in the cylinder. If you believe this, then you are going to have problems. Cylinder pressure is created when the O molecule separates from the N2 molecule, creating extra oxygen to promote combustion. Do you believe that nitrous is flamable?
Like I have stated earlier, you dont have to believe me, Im just offering some basic knowledge. Im not gettting paid to do that, just giving some advice. Any real racer that uses nitrous, will always use it right out of the hole. Thats how you will make the most of the stuff. Wether you leave at 1500rpm, or 6000, it will all work. Try it. And about the trannys, why would you even add 150 extra hp without beafing up the tranny. What a waste. If you shut your nitrous off every time you shift, you will lose.

 

I throw in my $.02 What you say does make sense for a full on racer that wants to make to most out of their configuration.

I myself don't. I just want my car to be faster than stock. But also be realiable.

Yes, not spraying out of the hole and not spraying through shifts won't net you the best time. I am not trying to be the fastest. Just faster than most.

You just have to remember that there are beginners here that will listen to you and then when they blow up their tranny or rear-end, be very upset.

 

Hmmm... I dont beleive that's what they were saying at all. I thought they stated that more nitrous was being taken into the cylinder per stroke at lower rpms, than at higher rpms.

 

Right you are!

Rich Krause

 

Well, Im lost in what you are saying then. You are claiming that you will take in more nitrous at 1500 rpm PER STROKE then at 6000rpm. Still doesnt make sense. to make the 150hp, you need a given amount of N2O. The cylinder isnt very efficient at that low of an rpm, which means it wont take in as much as it would at a higher rpm. That is why when you build a small block to be fast, you increase the rpms. The whole issue here is cylinder pressure. What creates this cylinder pressure? Do you know? No one has answered that yet. Maybe if you could answer this question, you would start to realize what is wrong here. I have 4 kits on STOCK LT1 camaros, running 150 hp of NX nitrous, with no timing retard, and stock AUTOMATICS. no problems yet, and they are wooping some serious ***. Had the kits for over a year.....But I guess those 4 are just lucky!

 

Well that's exactly it, as stated before, most of us here aren't REAL 12-point-rollcage pulling-tires-3-feet-off-the-ground john-force-burnout type racers. We just want a faster but reliable car. I am a 17 year old high school junior without a job. I've done odd jobs and such over the summer and saved for quite a while and finally have enough money for it. I'm paying almost all of the exactly $1000+ tag price except for the first bottle refill and wires because i'm broke. I don't have an extra 500-1000 to beef up my tranny.

I will speak on rich's behalf when I say we are not saying more nitrous is injected into the motor with increasing RPM. Maybe we've both gotten too complicated. We're just saying that the lower the RPM you juice at, the more stress you're putting on the motor, and more stress means something is more likely to go. I'm about to call Jon Thompson right now....

 

Hey, like I said before....Im not talking about fast race cars. Race cars wouldnt be anywhere around 1500rpms except at maybe idle. Im talking about stock camaros with only 100-150hp worth of nitrous. If you dont want to do it, then dont. Im just telling you it will work. The backfires some have claimed were caused by the low rpm useage, or using between shifts, is not true. Just trying to help a few people out. If you choose not to listen, it wont hurt my feelings any. But if you are trying to learn, then look at what Im saying, and figure it out. ITs a free country, do as you want.....And who is Jon Thompson?

 

Jon Thompson is the Southeast's NX rep, he is extremely knowledgeable in the N20 area. Many people from around the country have discussed topics with him. I think a while back someone posted about using alky and n20 or something to that effect and they called him and got all the answers they needed. Extremely knowledgeable and friendly guy. I can't deal with this anymore tonight, too busy.

 

CustomN2O,
Here's what happened to me.
I was going around 30 mph. I stomped on the gas to activate the n2o. at the same time, the tranny downshifted. Then bang! So for that split second, I assumed the engine had more nitrous and fuel than it could handle at that time.
I really used to love spraying out of the hole, but I didn't want to risk that again so I went with a dual stage and window switches.

Do you have any ideas as to why that happened? I also have an aftermarket pump and guage. Fuel pressure is at a constant 42 lbs, aftermarket ignition, colder plugs etc.

 

If your engine gets "too much N2O", trust me, the result wont be a backfire, but more like a broken rod out the side of the motor. Not saying it didnt happen to you, but I am saying that it most likely was caused by something else, or a combination of things. Popping in the intake 9 times out of 10 means lean. Popping out the exhaust usually means fat. 100-150 shot of nitrous is very small, and shouldnt have a bad affect on things. Thats why the kit is only adjustable to 150 hp. They have found that to be a safe level for a STOCK 350 chevrolet. I can tell you that we have sprayed 250hp worth of nitrous through cast piston stock small blocks with success, but dont recomend it if you dont really know what you are doing. Anyways, spray safe and have fun.

 

CustomN2O......you ask alot of questions in your posts about certain things. The way you state it is as if you know the answers and want to see if anyone else does. I could be wrong about that, but if you do know the answers to the things you have asked.......please tell us the answer. The rest is a question for everyone. Would a dyno with a nitrous set up to tell you how much HP you are running with N2O in all rpm`s and would that tell you how much N2O you are getting at each rpm? Also, on a dual stage setup. For example: shoot a 150 shot for lower rpms and then shoot a 100 shot o add to it at higher rpms. I am not sure on how to do the daul stage, but if that is right. Wouldn`t the reason they shoot an extra shot at higher rpm`s because they aren`t getting as much nitrous in the higher rpm`s as they do in the lower rpm`s?