Running pig rich, increase the nitrous jet or reduce the fuel jet? Nano user

[Blackbirdws6]

Took a run in the Bird today and with a full nitrous and NANO bottle.

75HP - Nitrous
100HP - Fuel

Reduced the nitrous jet for the NANO but my wideband simply read "RCH" the entire pull. So its off the charts rich. I wanted to stick to a 100HP shot since I am on the stock shortblock with the heads/cam.

Would you recommend increasing the nitrous jet or reducing the fuel jet?

[Chris@NitroDaves]

I would jet down a couple of jets on the Fuel side

Ex.. 46 ( Current jet ) I'd go down to a 44 ( Depending on how rich the AFR is on the current hit )

[vetteguy130]

more fuel = safe in my book

[Brad@NANO Direct]

Do you know what your flowing fuel pressure is?

Which NANO system do you have?

What is your stock jetting?

What nitrous system do you have?

Where was your afr before NANO with the stock jetting?

[ATVracr]

Originally Posted by vetteguy130

more fuel = safe in my book

Your book sucks and hopefully noone reads it.

Nano isnt going to change it much if you have the right pressure to start with. on a 75-100 shot it will matter even less.

We are spraying around a 400 shot and see less than 100psi drop in the 1/8th.

If you want to be safe put the 75n 75f in it and see where its at first then go up from there when you get the 75 dailed in.

[Blackbirdws6]

Originally Posted by Brad@NANO Direct

Do you know what your flowing fuel pressure is?

Which NANO system do you have?

What is your stock jetting?

What nitrous system do you have?

Where was your afr before NANO with the stock jetting?

- Pressure goes into the 60's on the spray - Ford SVO #30 injectors/Racetronix FP with harness

- I have the 4500 NANO system. I'm not blaming the system for the rich condition, it was rich before I installed the NANO.

- Stock jetting was the 100HP jets (2- 22 Fuel, 2- 31 N2O) - TNT F1 LT1 system. AFR before the NANO was still pretty rich 10.0+ range which still wasn't good.

Since I want to keep the shot at 100HP and the NANO is said to flow more then I think I will leave the 75HP jets in and work on the fuel side. Make sense?

Here is a video if you are bored. You can tell when the juice hits if you listen closely.

http://www.youtube.com/watch?v=_hpaSiLdSN4

[BobDoLe]

Originally Posted by ATVracr

Your book sucks and hopefully noone reads it.

Nano isnt going to change it much if you have the right pressure to start with. on a 75-100 shot it will matter even less.

We are spraying around a 400 shot and see less than 100psi drop in the 1/8th.

If you want to be safe put the 75n 75f in it and see where its at first then go up from there when you get the 75 dailed in.

that's what i would do.

i went off nano's suggested nitrous/fuel jetting and ended up rich. then went with fuel setup for a lower sized shot in order to get my afr in the mid 11's. my 150 shot is possibly more like a 140 shot when using .057 jets (rated for 125 shot) at 11.5 AFR. i say this because in order to get that AFR, i have my hsw interface add enough fueling for a 140 shot. no way of knowing unless i put it on a dyno though.

my guess is if you kept the fuel jet the same, you'd probably be good with an 85 rwhp nitrous jet.

[spaz1]

I just watched the vid, that's some nice shifting, I'd drop the fuel jet down 2 sizes and see what happens.

[Blackbirdws6]

^ Thanks.

Just to answer the question I posed. I popped in the matching fuel and nitrous jets and the A/F was between 11.5-11.8 the entire pull. Felt a whole lot better as well.