my car could only handle a 110 shot of nitrous because of air/fuel being to high with a 150 & 125 shot. we used a 150 fuel pill & a 100 nitrous pill. will there be any bad long term effects of using this setup?

 

I see something strange with this set up! How did you monitor the A/F ratio?
my opinion is you have a regular a/f gauge instead of using a wideband! a regular a/f gauge is almost useless and just an annoying light show.....
i have used a 150 shot for years,from stock to wild set ups with NO a/f issues like you have. can you elaborate a bit more about your combo and such?

 

it was done on a dynojet, it was 13.5 with the 150 & 125 shots & fell to 12.6 with the 110 shot.

 

What was the fuel pressure saying? You should be about 11.8 on the airfuel with Nitrous..
Dave

 

air/fuel was in the 13 range with a 150 & 125 shot, it fell to 12.1 with the 110 shot. what can i do to lower my air/fuel?

 

would a walbro 255 help my situation?

 

anyone?

 

this will depend on whether or not you are not holding fuel pressure.

If the fuel pressure is steadilly dropping during a run you will need a higher flowing pump to keep up with demand.

Now if fuel pressure is steady all you will need to do is adjust the fuel jetting. A large jet will richen the car, a smaller jet will lean out the car.

To really be able to tell you what is going on we need to know:

Fuel pressure across the pull
A/F ratio across the pull