JRracing

iTrader: (35)

I have no presure switch on my bottle because of fitment issues, so I wired it on a switch and relay.
I was letting it heat up before a run and I let it get to 1250 psi on the gauge. It did'nt blow off and the car ran really strong down the track.

Were does it pop off at??
Is this bad. I don't want to see my quarter pannel blown off.lol.
It's a tnt bottle 10lbs.

GM Muscle

iTrader: (9)

I think most companies aim to have them rupture at 2,200-2,500 psi. I really wouldn't be spraying over 1100psi though. It can take a toll on the solenoid and it'll lean you out.

Slow Z28

iTrader: (19)

yep, there's a big difference in how it reacts at different pressures from my experience. but i think it's like what's been said, it's just the overall mixture being a bit "leaner". i made my nitrous passes at 850-900 and see alot of guys saying that's a good pressure, but i've also read people saying it should be up around 1050-1100? hopefully we get more people responding

strokedls1

iTrader: (1)

We run it at 1050 with the nx pressure activated bottle warmer. I think 1200 is a bit excessive. With a big shot it is nice to have 1050 to start because it drops to like 900 by the end of the pass.

MasterMind

iTrader: (-1)

Yeah the pressure definately drops off if your using a big shot. I spray 150 shot wet, with 1100PSI pressure.

GueSS Who

I run 900psi and pill the fuel according.

This way I have no bottle pressure drop throughout the run. Most of the big bottle cars and bikes run them between 8-900psi.

JRracing

iTrader: (35)

I ran it at 900 psi and the run did'nt go very well. It did'nt seem to hit as hard. The time was slower also.

TNTramair

iTrader: (15)

the higher the pressure usually means it'll hit a little harder...but you run the risk of freezing the solenoid or running too lean and hurting something. most companies suggest that their system is most effective at a set determined bottle pressure. TNT i beleive tests their kits at 950psi and state that thats where its best effective which is where i try and get my pressure to stay around when i hit.

goodluck.

Robert56

iTrader: (2)

I run 1150psi, but am a dry hit and fuel ratio will stay the same whether it's 600psi or 1500psi, one of the many benifits of dry. Also, on a dry hit if you up the pressure, it's the same as jetting for a larger hp hit. On a wet kit whether it's a higher or lower press, from manufactures suggested psi, you'll be going lean or rich.
Robert

JRracing

iTrader: (35)

I have a tnt f1 so by upping the presure I'm leaning it out? That don't sound good. I don't want to fry my motor.

strokedls1

iTrader: (1)

My nx jet card was rated for fuel @ 50 psi and nitrous @ 1050. If you use a nitrous calculator you can figure out the fuel jetting. Usually tnt and nx over jet the fuel by 1-2 steps for safety reasons.

Ouija

iTrader: (3)

NX's kits reccomend between 900-1050 psi.

That's why theyr second gen bottle warmer turns on under 900PSI and turns off at 1050PSI.

I know NX's blowdown tubes have a rupture disc which is supposed to pop at 3000 PSI. If Memory serves me correctly tanks are supposed to be capable of handling somewhere in the 5-6k PSI range, but I wouldn't test it.

GueSS Who

Ofcoarse you can't run the bottle pressure at 900 when the system is rated for the fuel pills to be for a 1050psi nitrous pressure. You have to rejet the fuel also or it will feel like a turd. It is getting to much fuel.

Robert56

iTrader: (2)

I am using a NX heater (don't know what gen) and it does much less than a optimum job of keeping it in this range. Yea, it might come up to pressure if you have 45 minutes or more. When you are in staging lanes for hours this is less than ideal. I am looking at the NX Fire and Ice to cure this problem as it will keep it within 5psi of the set pressure.
Robert

JRracing

iTrader: (35)

That would explain the bad run I had with a 900 psi bottle pressure. It fell on it's face on the low end, and then picked up on the higher rpm's.
The next run, I cranked up the pressure and the car felt very strong.

Somebody09

i thought it was 3000 psi... maybe i'm wrong.

-somebody

JRracing

iTrader: (35)

So 1250 psi is not going to hurt the bottle??

Robert56

iTrader: (2)

Nope, a buddy ran a 11.48 on 1500psi bottle.
Robert

CrawlinWS6

iTrader: (41)

I like using mine between 1050-1150, at 900 the hit seems weak with a 150shot but I will not run it over 1200, if its that high, I will purge it a little to lower the pressure some.

XTrooper

NX recommends 1050 psi and their bottle heater transducer is calibrated accordingly.