www.robietherobot.com/NitrousJetCalculator.htm
if using methanol for enrichment do the gas jetting x 1.4 for your jet size

will you actually see much gain from using alky as an enrichment vs gas? or is it mostly out of convenience for those who run alky in the motor?

no gain over gas it is just convienient

i have used both and they ran about the same.

Do u know what the fuel pressure is for the NX Kit?????

Five psi

Here you go......

This calculator is not even close for those that run low pressure nitrous (regulated down pressure)
See what happens when you tell it you have half of that 900psi.

not to sound stupid but why would you reg. it under 900?

Just some info. first 2 pic are what happens when you are way rich. 3 pic is little to no fuel, lean. this is on gas.


A rich condition is what caused his problem, but this explanation is not exactly what happens. Lifted ringlands are caused by fuel wash from a rich condition. The fuel washes all the oil from the cylinder wall. This allows the rings and bore to be metal to metal. The ring friction builds tremendous heat(killing tension) and transferring that heat to the piston. The ring land is the weakest part of the piston, especially at the pocket. The heat weakens the piston in the lands, basically allowing the lands to move back and forth. Eventually the top of the piston lifts and breaks part of the pocket out, the second ring sticks where the land pinches it...and then, oil is sucked into the chamber past the stuck second ring and you get the burned piston, that everyone thinks is lean. What you see is actually an oil burn, caused by the oil that is bypassed into the chamber, which results in detontaion because of the diluted charge. 90% of nitrous related incidents can be related to a rich tune up and/or too much timing. A lean condition is VERY seldom the cause. You will never, I repeat NEVER, get a square, 2 or 4 pill spread on a fogger clean enough to run multiple kits, without going to crazy low fuel pressure, like below 3 psi. I don't like pressure that low, so most of my tune ups are 6, 8, or 10 jet spreads for foggers. On the average plate tune for a race car, I am 10-20 sizes larger on the nitrous side, depending on the tune.