Just pulling your chain Jody.

I just didn't undrstand what you were asking. I never let my truck into OD at WOT so mine may ping as well.

I used Torco as well. I think it's the best additive of that type but, think racing fuel is likely better.

I have run over 20# of boost @ WOT, 22 degrees of timing with no detonation issues using 105 Unleaded.

I think 19-22 degress of timing @ WOT with 20# of boost using racing fuel is common. But as I said Ive never done this in OD.

 

I'm not doing any full throttle overdrive stuff anyway. Mainly trying to find out why the thing died at WOT from second to third gear. You said yours did the same so I'm guessing somehow it hit the limiter which I have since bumped up a bit.

Jody

 

Ive had mine shut off on 2 occasions. First it was due to a diablo chip not being right and second was due to a crimped mass air wire while running Mafterburner. You can only solder PCM wires.

 

Jody,

I presume you are logging your a/f with a wide-band unit. I use the Dynojet unit. Asking because I was wondering how much of a difference you see from the wide-band reading to a tailpipe sniffer on a dyno.

Thanks

 

FYI - The MafExtender comes with crimp-on connectors and it works flawlessly....

Ive extended PCM wires on other vehicles (Non-PI to PI head conversions, etc...) and they have worked fine..

Maybe you had a bad crimp??


Jody - Sorry for the confusion, the way you kept pushing the question on Steve sounded like you were making a stink about it.... I agree with Steve on the booster vs real race gas thing... Ive never had a problem with real race gas, but octane boost as always been 'wierd' for me..

Good luck....

-Dale

 

One dyno place measured virtually identical to what my LM-1 read at the pipe. Usually it seems the dyno guys read .3-.4 leaner than the truck actually is at the pipe versus up front at the O2 sensor. So if the tailpipe unit reads 11.8 A/F you're likely a bit richer than that, probably 11.4- 11.5:1

Jody

 

Jody, thats very similar to my findings.

 

how much fuel did you have ? if it was just under a 1/4 tank that could have been it....

 

What year truck? Also what gap is your plug and which plugs are you running? I need a little more info and I may be able to help you.

 

It's an 03 (nlp2). They are BR7's that the engine builder (Dante) installed. It only happens there, just did it again to me. I'm on my high boost setup, never did it on 16 psi. Wonder if it's too much boost/load at that point with these plugs and gap.

I just spoke with Dante, he said the plugs are gapped at .030". Don't think that's it. I'm now wondering if there's a boost limit in this program somewhere. I haven't seen anything but it appears to be a software issue. When the truck dies the tach and gauges are still working.

Jody

 

This seems to be common on the 03s. Gap your plugs down to .025 and you should be fine. Nothing in the program except if it is running very rich may be doing it also.

 

Thanks Tommy. Is 10.8:1 too rich at that boost level? It did just flash on that right before the shift. Of course 1/2 a point of that is the alcohol. Still I have datalogged this thing with A/F in the 9's and never had it shut off. Then again, not at 20 psi.

Jody

 

Well when you add lots of boost and lots of fuel it is harder for the spark to jump across. Just what I have found, hope it helps.

 

Thanks, I appreciate it.

Jody