AFR confusion
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AFR confusion
In order to dispel all confusion....
A look up table, compliments of donour and myself...but mainly donour.
A look up table, compliments of donour and myself...but mainly donour.
Last edited by Dustin@Vishnu; Aug 9, 2005 at 01:28 PM.
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i think thats the commslog they were talking about earlier. and i'd like to know where it is too..
EDIT: DONOUR do you have a beta of pyXede ready that will log AFR and Knock for us, so we can forget about this XMap high-speed logging bug
EDIT: DONOUR do you have a beta of pyXede ready that will log AFR and Knock for us, so we can forget about this XMap high-speed logging bug
Last edited by Sackett; Aug 9, 2005 at 03:45 PM.
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Dustin, does the smart fuel table need to be recalibrated? Because between 6-8k it's shooting for 10.0 afr according to that chart. Wouldn't that be a bit low? Or should the analog output on the LC-1 be reprogrammed? Thanks.. just a little confused here...
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Originally Posted by joeycoates
I just downloaded commslog into my Xmap3, will the high speed data logging automatically work now or do I need to do something else?
I'd just run commslog6.exe, don't even open XMap. It has its own standalone interface.
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#8
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Originally Posted by Rushin
just a little confused here...
Rushin, the point of this table is just a reference so that when you datalog AN1 you know what that value corresponds to. Dont go messing with the smart thresholds or LC-1 calibration, you're likely to mess things up further.
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Originally Posted by Rushin
Dustin, does the smart fuel table need to be recalibrated? Because between 6-8k it's shooting for 10.0 afr according to that chart. Wouldn't that be a bit low? Or should the analog output on the LC-1 be reprogrammed? Thanks.. just a little confused here...
Shiv
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There's nothing magical about that table. It's just calculated from the numbers in the LC-1 manual. Where V is AN1 reading (percent of 5v):
AFR = (22.39-7.35)*V + 7.35
That's all she wrote folks. I generated the table simply by writing a program to calculate that on all the possible volt reading in AN1 (there are only 256 total). As I told dustin, you don't need a table if you can remember that ^^^ formula. The table that shiv posted a while ago was taken from the wrong place. It's perfectly correct, just not for our LC-1.
d
AFR = (22.39-7.35)*V + 7.35
That's all she wrote folks. I generated the table simply by writing a program to calculate that on all the possible volt reading in AN1 (there are only 256 total). As I told dustin, you don't need a table if you can remember that ^^^ formula. The table that shiv posted a while ago was taken from the wrong place. It's perfectly correct, just not for our LC-1.
d
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Originally Posted by shiv@vishnu
The SMART fuel table does not need to be recalibrated. It is just fine the way it is since the "zero line" was set based upon the AFR targets displayed on my dyno's wideband (the one I use for custom tuning). The actual AFR numbers are meaningless for the most part. Just shoot for the "zero line" on the SMART fuel table and let the xede do the rest.
Shiv
Shiv
This is what I am wondering about. How do we know where this 'zero line' is, and how far away from it we are?
Do you mean that the AFR numbers in the smart fuel table are meaningless, not the ones datalogged right?
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Originally Posted by shiv@vishnu
The actual AFR numbers are meaningless for the most part.
Shiv
Shiv
My regular fuel table is shooting for 11.1. When I enable smart fuel I can see it adding more fuel, and according to the formula or the table, its "zero line" at 6k is shooting for 10:1. Should we be running 10:1 afr in that range or is smart fuel not calibrated correctly?
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Originally Posted by Rushin
I'm not sure what you mean by "actual afr numbers"
1) The LC-1 is calibrated correctly (the way Innovate intended) and the signal represents actual AFR values. The current Xede firmware may not inpret them that way, but that's what they are.
2) The LC-1 (edit : ) signal range is a narrower band because of calibration. This doesn't matter since the Xede isn't inpreting the signal as true AFR anyway,.
d
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Originally Posted by donour
I echo your sentiment. I see two cases.
d
d
EDIT: oh.. do you mean that vishnu had their lc-1 recalibrated?