What pressure is everyone spraying at...? I spray at 950 to 1000. Talked to my filler today and he sprays at 1100-1150....?

Just seeing where people are at?



Paul

 

I always ran mine at 1050-1100.

 

950-1000 here

 

850-1000 here.

 

1050-1100 here

 

950 every time...Nitrogen Push

 

1070psi here, dry though.

 

1000-1100psi... I should prolly go a little lower, but it's only a 100shot and I'd rather be a little high than a little low.

 

Robert- I don't ever deal with dry systems and was wondering about the bottle pressure's effect on them. Is there any issues with the car going rich if the pressure is too low (850-900psi)?

 

Same here.

 

No rich, that's one of the beautys of dry, variable a/f through the maf (reads density, temp, velocity), so as the bottle goes empty (all the way no problem) a/f is adjusted as pressure changes to your tuned a/f ratio you set at WOT (setting ltft and recalibrating maf at frequencies n/a and only seen while spraying wot, two tunes in one). Whereas, a wet hit with mechanical fuel jet your stuck with optimal a/f only at full pressure. Wet guys should use the N/X fire and ice heater (only varies by 5lb's). You can have the two tunes in one on pulling timing also. You can tune out the lean spike on initial hit, also. I have a lean spike right now in second when 2nd stage comes in 17:1, but confident I can get rid of it mostly, although no KR anywhere and no timing pulled yet. This currently at 185hp dual stage (working my way back up with tune).

 

Robert- Thanks for the explanation, that's kinda what I was thinking, but wasn't sure about the tuning required throught the car's computer.

 

950-1050 here

 

One more thing to note for wet guys. If you raise your bottle pressure above the manufacture's psi, you've upsized your n2o jet through the added press, so your a/f will be lean. this works great for dry guys as according to track conditions if your dial in time is off bump up the press for added hp. wet you can do also, but more difficult to get a/f correct with also upsizing fuel jet. you can do a spread sheet ahead of time though.

 

1000-1100 here. i had it tuned @1050.