Nitrous works recommended the use of .052 n20 and .033 fuel jets to achieve a 125 hp shot. However, plugging in the n20 jet and bottle/fuel pressure into an online jet calculator results in a recommendation for a .029 fuel jet. Does the nitrous works recommendation sound really conservative to you and would I stand to gain from leaning it out somewhat? I also installed a racetronix pump so would this fatten up the a/f from the stock pump?

Mike.

 

Nitrous Supply recommended the same jetting combo for their 125 shot. I tuned the N2O on the dyno and with recommended jetting it was REALLY rich. we kept putting smaller fuel jets to get the AFR right. I think they use conservative jetting to prevent someone from killing the motor if their fuel system isn't up to par. funny thing is the HP didn't really increase when we got the AFR's on track, but torque just kept on climbing.

Greg

 

What fuel jet did you end up using???

 

we ran out of small jets, so AFR's are around 10.75 through the rpm's with a 30 fuel jet. we estimate it probably needs a 28 to be dead on.

Greg

 

I use nitrous works and i am using 150 wet kit. I followed the specs and dynoed and it was fine..it was alittle rich but i guess thats fine so i dont have detonation

 

how much timing, if any, did you take out? What A/F ratio were you at w/ the 150 shot?

 

I think i was around 11 on the a/f and i cant tell you exactly how much timing...but its 2 for ever 50 so somewhere around 6