I'm running a nx kit on my car and I'm very happy with it. I have yet to put a perge system on my car and usually just perge it when i do a burn out or just tapping the gas a few times til I release the pressure in the lines. I am gonna put a perge system on it pretty soon, but I was just curious if it was bad on a LT1 to spray without having the perge system. Can it flood the intake? Any help would be appreciated!

 

I'm not sure how bad it is to spray without purging on an LT1....

but i've been doing so...(spraying without purging)...for about 15K miles now....

Car's still running fine...

 

I would not "tap the gas" during the burnout. Only use it with a load on the motor. You can easily over rev the motor this way. Even if you have a spark type rev limiter I myself would'nt want to do this. I dont arm the system until after the burnout just because of that. JMO. And no, you dont have to purge, it is used to get the same bottle pressure for every run, makes it good for bracket racing, being consistant.

 

I have a brand new (still in the package!!) NX purge kit for sale if you need one. I'll give it to you cheap if you're interested, shoot me an email if so. Oh, and I've heard bad things about trying to purge the lines by mashing the throttle during the burnout........boom!! (Just what I've heard, never actually seen it happen). Let me know about the purge. Thanks.

Joe.

 

purging while doing the burnout isnt the best idea,as stated above....but has been done.

Also,Purging will make the initial "hit" harder,gets fresh nitrous up front,some guys like the "softer" hit,lets the tires hook up better.

 

Purge in a burnout, and sooner than later, you will be towing that thing home. Ive seen the intake elbow and everything before it get blown off more than once by ppl trying to purge in a burnout. Just before you do your burnout, stick it in neutral, bring the RPMs up to 3000 and hold them. Spray it once or twice, depends on how the nitrous hits, to purge the line. Then you are good to go. Thats MUCH better than playing with it during a burnout.

Kyle

 

Thanks for all the info guys. I really do appreciate it. I havent had any problems yet and I hope I never do. I'm only spraying a 75 shot right now because I cant get it to hook with street tires. I'm getting my DR's for Christmas and hopefully that will solve my hooking problem. Thanks again!!!

 

uh, no. heres the low down on purging. its one of those things that i keep reffering to as a "safety net". its not nessessary, but it wont hurt either. take that for what you will.

now, first off, a purge, whether performed by a solenoid or by simualtanously(sp) hitting the gas and the nitrous, is somthing that NEEDS TO BE DONE BEFORE EVERY RUN. the point is to clear the lines of any air or vapor. see, whatever nitrous that is left in the line from your bottle to the solienoid after your run, will turn to air or vapor after it sits for a few hours. if this(purge) is not done, it can result in a backfire blowing the TB or intake skyhigh.

i myself dont have a purge. before every run i simply put the car in neutral, bring the rpms up to about 3k, and tap the button. i have had no problems at all doing it this way however thats not to say that others havent. i have thought of getting a purge kit and may do so down the road but right now, thats a 100 bucks that id rather put somwhere else.


good luck and be safe!

 

uh, no, you are wrong. The system is a closed system. No air can get in the line. The only time air is in the line is when you fill the bottle or break the lines loose for whatever reason. Think about it, you are saying that n2o turns into air when not in use? Wrong. How can air or vapor blow the intake off? And no, you dont have to purge, like racingLT1 said people who choose not to do it so it wont hit as hard and give you time to hook up. I'm not sure on the exact physics of n20 but I do know it will not turn into air. Fred, you need to chime in on this with all that knowledge you got!! Not insulting you IQ or anything but I'm pretty sure on this one.

 

Ok,Nitrous doesnt turn into "air"........BUT it will turn into gaseous Nitrous wich is referred to as "air". Purging gets fresh liquid nitrous to the solenoids.

 

thats what i meant. youll notice the word "vapors" in my post. i did say "air", but obviously i did not mean it turns into the same air that we breath or that is outside.

i know its a "sealed" system but if you dont clear that "gasious vapor" THAT IS NOT NITROUS from your line, sooner or later your going to have a BACKFIRE.

do you know what a backfire is? if you have a bunch of fuel going in but no nitrous it can build up or "puddle" and then once that "gasious vapor" IS cleared and the n2o hits it your going to have a small "explosion" in your inatke and break it to bits, or blow your TB off.


please.........

 

actually its just the opposite, the n2o will puddle in the intake tract, thats why people use window switches. If the n2o kicks in,say, 3k or below you have a chance of it puddling. Then as the vac. increases the motor gets a big gulp of n2o. Havent you ever had your bottle just about empty and hit and it falls on its face?its because its flooding out, all fuel and no n2o. I've never seen a n/a car blow the intake off (not the elbow, the intake) but I have seen a couple of n2o cars blow the intake and hood off. I dont believe a fuel explosion could do all that damage. Also that gasious vapor is still n2o but not at the proper state. You can still get a "hit" from this vapor but not like you would a good liquified hit. Like I said before, purging is so you leave the line at the same psi every time. I make sure I'm at least 950-1000, specialy if its a race for some cash, my car is pretty consistant if I leave with the same psi every time, and I couldnt do it without the purge.

 

this is completely wrong. for those that choose to listen to this, thats fine. but you WILL be replacing somthing under the hood eventually. think about it, if there was no need to purge, why would they sell the kits? why would everyone say that you need to clear the lines before your run? why would anyone even mention "purging"?

please, dont take my word for it. read up on it some. youll be glad you did. i think youll find that theres more to it than just "being consistant", and that theres no other reason to clear the lines than that.

 

This thread is turning out to be nothing but a pissing match......


I will post my input though.

There is NO threat to your motor if you do not purge. The ONLY problem you will encounter is your are going to be running rich for the first .5 seconds until the fresh N20 reaches the selenoids and nozzle.



"If your N20 mix is to rich - your floorboard is going to fall off...." (Fast and the Furious)

 

Yes and no. Yes you will be rich till the N2O catches up .......if you'r to rich your engine may stumble which could lead to a backfire IF you dont have a window switch to shut the system down.

And it is fuel that will puddle not N2O(its a gas when not under pressure).