Just installed my kit (nitrous express proton plus). I have it jetted for a 100 shot (.052n/.028f). I noticed on my wideband that it went to around like 10.1. Should I put a smaller fuel jet in to raise the afr? In doing a quick search I’ve seen that an appropriate afr is 12.1.13.1ish. Running br6ef plugs gapped to .032. Small cam, headers, intake, tuned, stock trans. And FYI I’m a nitrous newb who popped his cherry with this kit. Appreciate any input.

 

You would need to switch your jets or have the tune request less fuel under WOT and have the fuel jet make up the difference that you need.

If it was tuned for say 12.5AFR before the bottle, you'll never get it to stay there with adding a nitrous wet kit without altering the tune again.

Try going way smaller on the fuel jet and see if you get a lot closer to 12.0.

 

Well I feel like a retard and shoulda posted this a day earlier. I put in the 3177’s today with new wires also. That low afr was on the old plugs. I just got done doing 3 rolls against a challenger and didn’t see my afr go below 12, so I’d say it was just a plug issue. The old plugs were overdue to be changed, and had a large gap. They were ngk tr5ix I believe. Truck has the br6ef in it now.