Is wide band O2 sensor enough/useful for setting up N2O system?

I have NOS Cheater (plate) system running 63N/73G jets on a Ford 460. I have dedicated fuel pump for N2O set at 6psi.(deadhead).
Based on O2 sensor, at WOT I'm getting a reading of about 13:1 on the meter. I increased the Fuel jet size from instructions (63/63 to 63/73) until I got "rich" on the meter.
Is this enough to tell me I'm set up right? I don't see any issues with the plugs (maybe it's too early to tell).
I also retard ignition 4 dgrees on spray.
Feels strong. I don't have access to dyno or strip for testing/setup.

wow that has to be fat as hell, I'd think it would run stonger w a 73n 63f......................the plugs will tell the tale, but street driving is gonna make um look fat anyways.

What fuel press?

with that cheater kit ....try 63n and 53 fuel , 5.5 psi , make a couple of 1/8 blasts and ck the plugs

richter69 wrote:wow that has to be fat as hell, I'd think it would run stonger w a 73n 63f......................the plugs will tell the tale, but street driving is gonna make um look fat anyways.

What fuel press?

I think I go the number backwards - I was going from memory. I'm running 6 psi to plate.

Is using the wide-band O2 sensor a reliable way to set N2O/Fuel jets? Do I want 12.5 to 13.0 air/fuel ratio on spray (if everything is correct) or is reading the plugs the safest/best way to tell?
Thanks.

Use the plugs.... A o2 will only tell part of the story.

i run a 65n 52f 5.5psi fp 26* total timing i take a little more timing out bc of my cast piston

The most accurate way it to read a combination of the plugs and the time slip..

A/F meters don't know anything about what's going on IN the ENGINE. They only know what they see OUTSIDE in the EXHAUST.

Taking a rich tune and adding timing to burn the fuel will trick and A/F metter into somewhat reading correctly in many cases. On the other side of the coin, a lean engine that is undertimed can look OK as well..

Bottom line an A/F cannot tell the difference between lean/rich and overtimed/undertimed.

Also, most only have one in a single pipe or one in the collector "averaging" four cylinders ?? Just a lil food for thought... Thanks, SJ