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AFRs and Timing advance/retard

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Old 07-29-2009 | 01:29 AM
  #76  
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JOKA,

Why couldn't you have gone Vitesse so you could fine tune mine?????


Damn you....
Old 07-29-2009 | 02:51 AM
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Originally Posted by JohnKoaWood
I'll take pictures of it when I pull it out... WOW THAT SOUNDS DIRTY.....
forever
Old 07-29-2009 | 04:37 AM
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Originally Posted by CPR
JOKA,

Why couldn't you have gone Vitesse so you could fine tune mine?????


Damn you....
I offered... How's it coming BTW?
Old 07-29-2009 | 08:19 PM
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Update sort of have not disabled the N/B yet but drove it today. Did not data log, I thought I could read the A/F at WOT! Uhh wrong, I have to watch where I' am going!

I had it in 4th and 5 th at the legal limit 45 and 55, straight road for 25 miles, so I am at around 2100, 2300 rpm. If it's running rich at WOT which it is, it's dumping fuel when I open it in that range, it's does not bucket or surge but it is very laggy, it hits 3000 and it takes off.

My question is if I have a boost leak, how come I can set the boost and it holds? I have not checked for a boost leak yet but that is my question. Anyone?
Old 07-29-2009 | 08:28 PM
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Originally Posted by schip43
Update sort of have not disabled the N/B yet but drove it today. Did not data log, I thought I could read the A/F at WOT! Uhh wrong, I have to watch where I' am going!

I had it in 4th and 5 th at the legal limit 45 and 55, straight road for 25 miles, so I am at around 2100, 2300 rpm. If it's running rich at WOT which it is, it's dumping fuel when I open it in that range, it's does not bucket or surge but it is very laggy, it hits 3000 and it takes off.

My question is if I have a boost leak, how come I can set the boost and it holds? I have not checked for a boost leak yet but that is my question. Anyone?
Disconnect the NB, get a data log, with idle, part throttle and WOT... post the results, OR if rich in all modes your chips need to be redone... try FQS position 3 for 0 timing -3% fuel and see what change it makes to your mixture with the NB disconnected... record data for all of this... I have Zietronix SW and can look at your data logs directly if you want... just e-mail them to me at johnkoawood@aol.com... My bet is your fuel and timing maps are not set for the car as it is now... and I am willing to bet you are rich across the board without the NB input to the DME...
Old 07-29-2009 | 08:32 PM
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Ok it will take me a day or two to get to it but thanks.
Old 07-29-2009 | 09:47 PM
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Hmm, I'll have to check my notes... But IIRC with a disconnected NBO2, the will assume you are lean and enrichen the AFR.


-Rogue
Old 07-29-2009 | 10:40 PM
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Originally Posted by Rogue_Ant
Hmm, I'll have to check my notes... But IIRC with a disconnected NBO2, the will assume you are lean and enrichen the AFR.


-Rogue
Hmmm.. interesting, no NB mine idles at 14.7:1 and maintains it at cruise... only goes rich when throttle is applied, or WOT where it will hold rich... if below 60% it will normalize at 14.7:1 even with the NB unpluged...

Runs MUCH smoother with NB connected, but will run with it disconnected... IF it goes too rich without the NB (10:1 or so...) wouldn't the engine die premature death when the NB fails? this is how I tuned my idle and PT fuel maps...took me 2 runs..now the WOT map and timing maps have been what I have been playing with since...
Old 07-29-2009 | 10:51 PM
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Well I disconnected the NB or so I thought the ARC ONE slowed down at idle the, WB showed steady at 14.7 did not dither. Just drove around the block, down the highway.

Nothing seemed diffrent, is the Zetronix WB tied into the NB? I did not install it.
Old 07-29-2009 | 11:02 PM
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If you tapped it into the NB input it does, but this isn't automatic... your behavior should be different without the NB connected.... But you're still WAY rich WOT, but normal all other throttle positions?
Old 07-29-2009 | 11:08 PM
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OK, I think that's what he did. I'll give him a call Friday and confirm.
Old 07-29-2009 | 11:43 PM
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If the Zietronix is tapped into the NB O2 circuit, you can change the switching point... but that won't fix your WOT richness... I still think you need your chips re-imaged...
Old 07-29-2009 | 11:49 PM
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I have two Max chips one for the AFM and one for a MAF. If they were mixed at install, think that would cause the problem? It is only rich at WOT.
I am running the AFM and it's suppose to be the AFM chip. He took off the MAF to pass smog which it did.
Old 07-30-2009 | 12:00 AM
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You might have the wrong chip in... try swapping chips, OR the ones you have out of the car should have a code written on them, Russel Berry can tell you which one isn't installed...
Old 07-30-2009 | 12:02 AM
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Phone call sounds easier.
Thanks


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