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Delphi 85mm Maf Tables

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Old Jan 18, 2008 | 11:54 PM
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Default Delphi 85mm Maf Tables

When Using A 85mm Truck Maf (not A Slp Modified Maf) On A 02 Ls1 What Values Are You All Using For The Maf Table And How Accurate Do You All Feel These Are?
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Old Jan 19, 2008 | 12:46 AM
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you will want to match the MAF
to the car with tuning.
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Old Jan 19, 2008 | 03:41 AM
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Shoemike, what map do you make to tune the maf??? Ive read several different things.
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Old Jan 19, 2008 | 09:42 AM
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the maf frequency vs. airflow table, log fuel trims for maf frequency and adjust from there
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Old Jan 19, 2008 | 10:04 AM
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Originally Posted by Ryne @ CMS
the maf frequency vs. airflow table, log fuel trims for maf frequency and adjust from there
Yup and will likely need a wideband from greater than somewhere around 7Khz.
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Old Jan 19, 2008 | 10:14 AM
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Frost or Ryne can either of you post a screenshot of exactly what map to make? I made one but just trying to make sure Im doing it right. And am I understanding it right that you do the MAF after you reenable it??
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Old Jan 19, 2008 | 10:49 AM
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Personally, I log commanded AFR and actual AFR to derive AFR % error and log that % error in a table that matches the MAF's so that the % error can be applied (copy and paste-special) directly back against the MAF in the editor.
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Old Jan 19, 2008 | 11:19 AM
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Opk Im Just Using The Gm Truck Maf Values ... My Logic Is Its A Truck Maf Originally So Why Cant I Just Use The Maf Table Out Of The Truck It Came Out Of?
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Old Jan 19, 2008 | 11:28 AM
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because the tables are based on that MAF and how it acts in that OEM truck intake tract.

It's much easier than VE tuning to get it squared away.
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Old Jan 20, 2008 | 12:59 AM
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Yea But What If You Not Sure Your Ve Is 100%

At This Point All I Know That The 2 Together Work Good But I Dont Know If Either One Is Off And Just Compensating For The Other
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Old Jan 20, 2008 | 03:02 AM
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Can anyone just post a shot of the map they use to tune the maf when its reenabled?? Just to make sure im looking at the right things. Thanks
Brian
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Old Jan 20, 2008 | 06:39 PM
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If you're steady throttle and over 4000RPM (which you should be
with the converter) then it's all MAF for airflow. Verify this by the
Dynamic Airflow and MAF Airflow readings being identical. Use the
wideband WOT reading against commanded AFR to judge the MAF
(and injectors, and fuel pressure, etc.) accuracy.

Curved intake tract can bother the MAF, yours isn't but trucks
tend to be. Still I found the truck table put me dead right, back
before I did the cam swap. Then it went a bit to the rich side.
Have not revisited it since the intake swap.
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Old Jan 20, 2008 | 06:44 PM
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http://forum.efilive.com/showpost.ph...77&postcount=9
this is for efilive.
also change {B0120} from 4000 to 400
this way you will be using the MAF only for calculated airflow.
this is not the best forum for tuning info IMO
hang out in the efilive/hptuners forums for better tuning advice.
and don`t worry about your VE not being 100%
there are too many variables from day to day for it
to be perfect each time you log.
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Old Jan 21, 2008 | 12:02 PM
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Shoemike, I have one question about that link you posted. When it says keep closed loop disabled as in autoVE tuning does that mean to just keep the LTFT disabled???
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Old Jan 21, 2008 | 02:09 PM
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Well Rich Is Better Than Lean, Espically Since Im Looking To Use My Maf For Spray Fueling
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