Azn Kenny

I have a pretty complex problem and was wondering if you could help me out. My car was street tuned all motor with CROME and we got my afr to about 14.3-14.3 throughout the rpm band; we only messed with the fuel map and didn't touch ignition timing.

Shortly after, I bought a single solenoid dry kit by NOS with a 0.042 jet. I also got NGK 7 plugs, B&M fpr (set at 45 psi with hose off), and pulled timing by 1 degree. So I hooked up a wideband to it and it runs incredibly rich but has a few lean spots at partial throttle.

When we sprayed at WOT we saw the afr got as high as 35:1 which got me worried, is this too lean for the motor? How can I tune for nitrous? I was planning on tuning for WOT while spraying but does this mean my car will run rich at WOT while not spraying? Thanks for the help.

drumking15

ummm yea are you suing anything to add fuel for the nitrous...usually its part of a kit

Azn Kenny

No it's a dry kit so there's no fuel enrichment with the kit. The only thing I did for fuel was bump up the fuel pressure via adj. fpr. and run premuim gas.

turbolshatch

dry kits usually come with something to bump the fuel up a bit

Azn Kenny

Like what?

Ray-mond

Try reconnecting the fpr.Dry nitrous still come with something to give it more fuel and disconnect the hose that goes to the nitrous solinoed.That should give u an ideal of were ur at.

0xenocron

You sure you didnt have a leak around or near where the WB o2 was placed?

At 35:1 AFRs your car wouldnt be running, and if it was, it would be misfiring like a SOB

drumking15

i dunno maybe this is completely retarded and my late night thinking....if he is running a dry system w/ no fuel enrichment...could he actaully be blowing some remenant nitrous into the exh causing the wbo2 obviously to read a higher oxygen content due to the oxidizer present

Azn Kenny

There's a small exhaust leak AFTER the wideband, doubt that affects it any though.

And drumking you make a good point about the sensor reading the n2o...

Azn Kenny

Any other ideas?

raceACCORDingly

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LS-N &raquo;</TD></TR><TR><TD CLASS="quote">Like what?</TD></TR></TABLE>

the zex kit comes with a NMU box that manipulates the FPR vacuum to increase fuel pressure under spray.

nonvtecallmotor

14.3 A/R on the motor? Thats pretty lean too. You should be more like around 12.8-13.5 and 13.5 is one the high side.

I would make sure that your vacuum lines for the nos kit are connected right. Sometimes the vacuum lines blow off and will cause it to run lean.

And I think a .042 jet is a 125shot on a dry kit. I ran a .036 on my 70 shot dry with no problems.