I knew some Car-bi-nator guys would be along to help :)

One day I am going to convert, actually already started, but those $200.00 each Moran injectors is a hard pill to swallow..:bigthumb:

Yes but it is the last injector you will have to swallow :).. adjustable FTW just got me some 220's.. and man the spray pattern is B-E-A- utiful, compaired to the 160 bosh/ford CNg injectors I was running.. and the flow rate isn't all fubared around 1-3ms, ahh they are nice.

How much for the 160's if they are still good?

I am running 7 lbs of fuel pressure. I have a oil filled fuel pressure gauge mounted at the outlet of the regulator.
I am going to change the carb to a 750 vac secondary and see how it runs.
It use to run fine with the 750 vac secondary on it before.

Electric fuel pump? If so, does it have a return to the tank?

stock in tank electric fuel pump with return line

7lbs could be a little high. Try 6 and run it. If that doesn't work try 5 lbs. I wouldn't go any lower than 5lbs though. Anywhere in between thouse #'s will work also to fine tune it.

Are u driving it back to the pits and checking the plugs? If so, of course they are going to be black. If u want to read your plugs you need to shut it off as soon as you go through the traps and tow it back.

Kill it at the eighth let it coast pull a plug swap a new one with it. Drive it to the trailer. Read the plug. Adjust.

x2, every serious nitrous user I know does it this way while tuning it. :cheers

If you are going to do it this way, I would pull atleast 2 plugs. One from the front and one from the back.

Yeah, the only way to tune off a set of plugs is to have a fresh set of plugs and shut it off as soon as you go through the traps. Otherwise, you are trying to tune for WOT off a set of plugs that are showing you your idle and part throttle.

That's why i have a 4wheeler at the track. when we make changes up or down in jet size she gets towed back and plugs read. :cheers

so did you fix your problem