Is the setup #57 Nitrous & #38 Fuel to rich on a 98Ram Air A4? If so, how much will the #38 fuel hurt my times?

This is on a NX Wet Kit.

Thanks,

Bill

 

Ack, that's WWAAAYYY rich. Assuming you have the same solenoids / fuel pressure as the LT1 setup.

My 150 shot (per NX's recomendation) is a 62 nitrous, 35 fuel.

Running way rich on nitrous REALLY kills off power, and fouls up plugs nicely too. And IMO this jetting is a bit rich as is for me; I'm gonna do some more tuning this week to get mine leaned out a bit N/A and see how rich she is on the bottle again.

 

that is way too rich. I run a 150 hit like Joe,and the 62/35 was way too rich,i had to step down to a 62/33 to get it from laying over on the nitrous.
As far as how bad it will hurt the times? cant predict,but you wouldnt feel much if anything running that rich.

 

I very much agree about running overly rich will just destroy the power output.

This is another big reason bottle pressure is so important (on a wet kit or "fmu-sorta" dry kits. The amount of fuel that goes into the motor will stay constant, but at lower bottle pressures, you get less nitrous. Just the same as jetting too rich.

For instance, I was playing w/ the juice on the highway a couple days ago (just got it going again, and seems to be running well). I was just playing w/ a 100 shot for testing purposes, and at 900 psi, on already rich programming and pretty rich jetting, it just didn't have much of a hit. Bottle hit 1000psi, and it was a significant difference in how hard the nitrous hit. I'm one of those people with a very insensitive seat of the pants meter, so if I notice a difference, it is definately there.

Best thing to do is simply tune the car on the dyno w/ a wideband O2. After the car is where you want it, simply spray it @ your normal bottle pressure (usually 1000psi). Then just lower the fuel jetting (or increase the nitrous jetting if youi are brave like that) to get to an approx 12:1 a/f ratio.