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Thread: Calc.VET: correcting MAF and calculating VE (in single log)

  1. #171
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    Will do. Thanks again Shawn. I will let you know when I start tuning.

    One thing that did cross my mind last nite. Because I am going to be starting from a stock 02 file with my 402. Should I add 15% to the whole ve table just to be safe like the auto ve tutorial states? I think I would be a little leary of doing any wot stuff till the part throttle stuff is pretty close with my setup being so far off from stock.

  2. #172
    R.I.P Shawn, 1956-2011 WeathermanShawn's Avatar
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    Len you don't need to add 15% to the VE Table in this method..

    As long as you are closed-Loop and MAF..here is what you do. Add any precautionary Airflow (resultant increase in fueling) of ~10-15% through the MAF Table B5001. I.E. add that % to the entire MAF Table.

    If it is too much Airflow you will Trim out any excess. That should prevent any PE/WOT problem. The formula will automatically calculate any increase/decrease in your VE Table.

    Again, assuming you will keep the MAF and closed-loop..
    2002 Black Camaro Z-28 M6 Hardtop 11.0:1CR 425HP/410TQ SAE (400TQ@3500RPM)
    200cc Heads, 228/232 110+2 Cam, 1 3/4" LT's w/catts, GMMG, Koni Shocks, Hotchkis Springs, 35/21 Sways, 17" ZR1's, 3.90 Gears Roadrunner PCM LM-2 Serial Wideband
    EFILive Closed-Loop MAF/SD Hybrid Tune..


  3. #173
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    Sounds good, I will def keep the maf and closed loop.

  4. #174
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    Im running a 383 with an FJO wideband (not via serial cable)

    I believe everything is correct since i have ran 2 logs now and posted to my current tune. According to the wideband, I am dead on 14.7 and STFT look about perfect!

    Anyone care to check my PIDS?
    Attached Files Attached Files

  5. #175
    R.I.P Shawn, 1956-2011 WeathermanShawn's Avatar
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    Yes thats the calc_pids.txt you need to run.

    You can always post up your log, but if you did everything right it can be done in 1-3 runs..
    2002 Black Camaro Z-28 M6 Hardtop 11.0:1CR 425HP/410TQ SAE (400TQ@3500RPM)
    200cc Heads, 228/232 110+2 Cam, 1 3/4" LT's w/catts, GMMG, Koni Shocks, Hotchkis Springs, 35/21 Sways, 17" ZR1's, 3.90 Gears Roadrunner PCM LM-2 Serial Wideband
    EFILive Closed-Loop MAF/SD Hybrid Tune..


  6. #176
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    Sweet! Much easier to work this according to your directions!

    Only problem i am working to resolve is hard start issues and idle when cold.

    When its warm, it runs pretty sweet! Just can hit the 12.2 AFR yet but am working on it

    THANKS to everyone who makes this work!!

  7. #177
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    Sounds like good results onegonewild. I will hopefully have some if the weather shapes up around here. Last summer when I did the calc ve I fine tuned my maf table to get the wot fuel spot on with a maf commanded vs actual table, but worked best was taking the log, higlighting the frames where the air fuel was off then,

    if the air fuel is richer than commanded divide actual by commanded and subtract from 1.0 ie:12.0 actual / 12.84 commanded = .9345 -1.0= .065 so in those cells you are .65% richer than commanded in tunetool take corresponding maf hz cells and decrease by .65% then I do a little blending to make it a smooth transition.

    If the air fuel is leaner than commanded you divide commanded by actual minus 1.0. Same thing.

    Maybe this isnt the way everybody does it, but it works awesome for me to really fine tune the wot air fuel

  8. #178
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    Shawn, I set up my maps and pids this morning. I had to select Calc.Ven (not corrected) to make calc.vet a valid pid. I didnt see that in the setup pid selection. Just kinda curious bout that. I selected the afr veiwing pid for 14.68 that Joe had set up. Other than that I should have everything ready to go.

  9. #179
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    Thanks for the pointers! Had a few days of 70 degree weather so i did get to test out this new tuning ability. All has been working well but now our area is stuck in the 30s.

    Soon as the weather breaks i will critique WOT and idle airflow! Cant wait to drive this little s10 with a 383!

  10. #180
    R.I.P Shawn, 1956-2011 WeathermanShawn's Avatar
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    Quote Originally Posted by rpmauto View Post
    Shawn, I set up my maps and pids this morning. I had to select Calc.Ven (not corrected) to make calc.vet a valid pid. I didnt see that in the setup pid selection. Just kinda curious bout that. I selected the afr veiwing pid for 14.68 that Joe had set up. Other than that I should have everything ready to go.
    Len, there are about 3 of these Pids that are sequential. I.E., you need PE Mode to make CALC.VEN to make CALC.VET work..etc. Remember we are in sort of a transition on Pids that ultimately will make all of this more clear. I updated Page 1 of this thread that now shows CALC.VEN, etc. Also, if you go to the PDF version of the CALC.VET Quick Start Guide, I give a little more detail on some of the filters etc.

    The bottom line is you sound like you did everything right. CALC.VET is what you are after..Glad to hear you are making progress!
    2002 Black Camaro Z-28 M6 Hardtop 11.0:1CR 425HP/410TQ SAE (400TQ@3500RPM)
    200cc Heads, 228/232 110+2 Cam, 1 3/4" LT's w/catts, GMMG, Koni Shocks, Hotchkis Springs, 35/21 Sways, 17" ZR1's, 3.90 Gears Roadrunner PCM LM-2 Serial Wideband
    EFILive Closed-Loop MAF/SD Hybrid Tune..


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