Reading the plugs.. Porcelain was dark gray.. There is more fine tuning with pressure adjust than changing jets.

 

How dark was it? Seems if the entire porcelain was dark grey, a jet change may have been needed. What does it look like now? Seems like that would require more than 'fine tuning'

How do you know what is too dark? Did you change timing at all?

 

Dirt track racer knows what he is doing. Like the very first post by phantom. A perfect tune up is a clean white plug barely any fuel ring.

He is also running a low pressure setup. Just pulling out 1psi fuel pressure makes a pretty big diffeence in the jetting. Like with mine being high pressure it takes more like 5-10psi difference to get close or be exact.

Every nitrous setup is a lil different.

 

correct thus the reason i run a low pressure system now, its easier to fine tune the fuel PSI than swapping jets, not so easy with a high pressure system.

 

Was that 1.5 psi on a 5 psi set up or on a 10 psi set up?

 

On a 5psi set up.

 

you're on a NOS crosshair, or crossbar right? i'm planning the same plate someday (if i ever finish my truck). i hear the NOS jet charts are pretty far off. how far from the fuel jet/psi did you guys deviate for the final tune?

 

Yea it's a crossbar. I don't know off hand what jets Danny stuck on the fuel side..

 

Please don't pull 1.5 psi from 5 right off the bat and think you'll be ok. I suggest sending your stuff to Monty smith or induction solutions to have your setup flowed so you know what the tuneup should be