Nitrous Oxide - How to set up a/f shutoff?

Ok I ran through my setup to make sure all my spray stuff is working correctly.

Right now i have torquer v3, full boltons, racetronix, green tops, HSW wet plate kit, tr-6s.

I just put a warmer in and have all the safety stuff.

I am running 12.8 a/f and 23* timing n/a.

I have the recommended jets in for the 75 shot. The timing on the 75 shot is 20* and whatever fuel it adds itself on top of the 12.8.

What should I aim my a/f to be and how should i set up my a/f shutoff? I believe i can set rich cutoff, lean cutoff, and time to cutoff in tenths of a second.


Whats the best rpm to start the spray? I think i have it set for 3500 right now.

Im gonna learn to read plugs to fine tune things.

bump please

Hit up one of the HSW guys on here, theyll be able to lead you in the right direction.

OK so I have a p series nitrous gauge with the a/f shutoff and a plx wideband.

I have a harris speed works wet plate kit up to 150 shot.
Ive been told my a/f should be between 11 and 12.5.

I see the gauge's formula for analog in is a/f=2*volts+10 and the plx gauges output formula is a/f=2.5volts+8.75.

I calculated it out and it looks like the plx will give off 1.5 volts for 12.5 and .9 volts for 11.

So does that mean i should set my a/f cutoff at 11.8(.9v) and 13.0(1.5v) on the gauge and then make the delay 3/10s of a sec.

Or should I set it up differently?

OK so I have a p series nitrous gauge with the a/f shutoff and a plx wideband.

I have a harris speed works wet plate kit up to 150 shot.
Ive been told my a/f should be between 11 and 12.5.

I see the gauge's formula for analog in is a/f=2*volts+10 and the plx gauges output formula is a/f=2.5volts+8.75.

I calculated it out and it looks like the plx will give off 1.5 volts for 12.5 and .9 volts for 11.

So does that mean i should set my a/f cutoff at 11.8(.9v) and 13.0(1.5v) on the gauge and then make the delay 3/10s of a sec.

Or should I set it up differently?

Give yourself a bigger window than that for the rich end of the spectrum. Honestly, everyone's car will be set up different so there won't be any 1 program that fits everyone's needs. For starters you can try that, but I think you'll have better results opening the rich end up a little.

Rick