Page 1 of 3 123 LastLast
Results 1 to 10 of 27

Thread: CALC.VET Struggles, VE Values Don't Seem Sane

  1. #1
    Lifetime Member
    Join Date
    Mar 2009
    Posts
    681

    Default CALC.VET Struggles, VE Values Don't Seem Sane

    I'm wanting to do a CALC.VET to my 97 dually in signature. While I live in CO, I'm on vacation in MI at a much lower elevation and would really like to clean up the VE and MAF while I'm here. My fuel trims are typically pretty good, but PE fueling doesn't deliver what's commanded so I need to start here first. The only mods to the truck are a slightly larger cam, 42# injectors, and a Whipple supercharger. I tried a CALC.VET here last year with my 1500 and the MAF correction values came out sane, but the VE stuff was telling me I needed to double or triple my VE values. I know they're not that far off. I'm using the stickied tutorial:

    https://forum.efilive.com/showthread...in-single-log)

    My dually is now telling me to copy/paste with multiply over 3X the present value as well. My OS started life as 12208322, but now is 1270003 so GM.DYNAIRTMP_DMA ought to be defined for it. My Techedge wideband seems to be communicating properly, I put the calc_pids.txt file where I was supposed to, my VE is in g*K/kPa, none of the PIDs have red Xs. . . could this be somehow related to me being 2 bar and not 1 bar? I was able to do this successfully in CO a while ago on my 1500 so not sure what the deal is here today. I've attached a log and the current tune.

    micalcvet1.efi
    MI KR V4.ctz

    Also, here's the calc_pids file I've been using.

    calc_pids.txt

    I've kept the original as well.
    Last edited by Supercharged111; August 18th, 2021 at 07:20 AM.
    1998 GMC Sierra K1500 5.7/4L80E, longtubes, 411 w/COS 5, marine cam/intake, Whipple. 91 octane at 6000'.
    1997 GMC Sierra K3500 7.4/4L80E, 411 w/COS 3, Whipple, small cam.
    2004 Corvette Z06 with longtubes.

  2. #2
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,164

    Default

    I'll take a look, probably something simple.

  3. #3
    Lifetime Member
    Join Date
    Mar 2009
    Posts
    681

    Default

    Thanks. I'm about to flash in the MAF changes. Simple math tells me I'll be pretty close on PE fueling with just the MAF change.
    1998 GMC Sierra K1500 5.7/4L80E, longtubes, 411 w/COS 5, marine cam/intake, Whipple. 91 octane at 6000'.
    1997 GMC Sierra K3500 7.4/4L80E, 411 w/COS 3, Whipple, small cam.
    2004 Corvette Z06 with longtubes.

  4. #4
    Lifetime Member
    Join Date
    Mar 2009
    Posts
    681

    Default

    Joe were you able to have a look? I'm about to set sail back for CO and won't be able to hit all the load cells there I can here.
    1998 GMC Sierra K1500 5.7/4L80E, longtubes, 411 w/COS 5, marine cam/intake, Whipple. 91 octane at 6000'.
    1997 GMC Sierra K3500 7.4/4L80E, 411 w/COS 3, Whipple, small cam.
    2004 Corvette Z06 with longtubes.

  5. #5
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,164

    Default

    In the scantool, on the PIDs tab select the pid CALC.CL and then save the file.

    On the Data tab check that CALC.VET has a values.

    Map should now show values for CALC.VET.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	pids selected.png 
Views:	33 
Size:	121.4 KB 
ID:	23866   Click image for larger version. 

Name:	map calc-vet.png 
Views:	30 
Size:	121.3 KB 
ID:	23867  
    Last edited by joecar; 4 Weeks Ago at 03:56 PM. Reason: typo

  6. #6
    Lifetime Member
    Join Date
    Mar 2009
    Posts
    681

    Default

    Quote Originally Posted by joecar View Post
    In the scantool, on the PIDs tab select the pid CACL.CL and then save the file.

    On the Data tab check that CALC.VET has a values.

    Map should now show values for CALC.VET.
    Oh it displays those values just fine. Truck runs pretty good so I doubt I need to multiply VE by 3 to get it in check. In fact, in SD, it was showing pig rich above 105 kpa as I'd just plugged in the tutorial values. Plug the MAF in and it's right back down around 11.5:1 that I'm commanding, so I know for sure both are wrong as hell but somehow playing nice together. I won't be back at an altitude where I can replicate this until after Labor Day. I'm lucky it will be so soon though.
    1998 GMC Sierra K1500 5.7/4L80E, longtubes, 411 w/COS 5, marine cam/intake, Whipple. 91 octane at 6000'.
    1997 GMC Sierra K3500 7.4/4L80E, 411 w/COS 3, Whipple, small cam.
    2004 Corvette Z06 with longtubes.

  7. #7
    Lifetime Member
    Join Date
    Mar 2009
    Posts
    681

    Default

    I'm in CA now, so can shift some focus back to this. Here's an example from my 1500 that I snagged back in CO. This first shot is after a quick jaunt, the smallest deltas indicate I need to bump around 30-40% while the biggest ones say I need to more than double my VE.

    Click image for larger version. 

Name:	Impact Factor 2.jpg 
Views:	26 
Size:	159.0 KB 
ID:	23874

    So I did a quick 30% global VE bump, went out for another quick rip, and it's now just as bad if not worse.

    Click image for larger version. 

Name:	Impact Factor 3.jpg 
Views:	25 
Size:	167.9 KB 
ID:	23875

    I would have expected to see those values get appreciably smaller but they did not. Something isn't right here, I have had it respond properly on other vehicles. That and there's just no way in Hell that my VE table is half of what it needs to be. Since I'm seeing similar values on the dually when I log it, I figure that I'm experiencing the same thing. 1500 has 12212156 based COS5 and the dually has COS3 based on a different OS.
    1998 GMC Sierra K1500 5.7/4L80E, longtubes, 411 w/COS 5, marine cam/intake, Whipple. 91 octane at 6000'.
    1997 GMC Sierra K3500 7.4/4L80E, 411 w/COS 3, Whipple, small cam.
    2004 Corvette Z06 with longtubes.

  8. #8
    Lifetime Member
    Join Date
    Aug 2013
    Posts
    713

    Default

    I just had a quick look at the log you posted and your IAT values are insane.

  9. #9
    Lifetime Member
    Join Date
    Mar 2009
    Posts
    681

    Default

    Unintercooled twin screw, yeah they get up there for sure. Trucks still pull harder than they do NA. I often contemplate a turbo with an FMIC, but the blower is there and functioning. The dually in my sig just pulled my ~9000# 24' enclosed car hauler from CO to CA through all those hills, most of which were climbed locked in OD with the AC blasting away in the desert heat.
    1998 GMC Sierra K1500 5.7/4L80E, longtubes, 411 w/COS 5, marine cam/intake, Whipple. 91 octane at 6000'.
    1997 GMC Sierra K3500 7.4/4L80E, 411 w/COS 3, Whipple, small cam.
    2004 Corvette Z06 with longtubes.

  10. #10
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,164

    Default

    Quote Originally Posted by Supercharged111 View Post
    ...Truck runs pretty good so I doubt I need to multiply VE by 3 to get it in check. ...
    The CALC.VET map is not the correction multiplier... it is the calculated VE...

    The Calc VET procedure corrects the MAF table and calculates the VE table from it.

    ( you will need to handraulically fill in unhit cells and make other adjustments... eyeball it and use common sense )

    On the map, turn on the Data Units.
    Last edited by joecar; 4 Weeks Ago at 04:06 PM.

Page 1 of 3 123 LastLast

Similar Threads

  1. Replies: 80
    Last Post: April 13th, 2020, 08:43 AM
  2. Did I do calc.vet right?
    By bubba68ss in forum Gen III V8 Specific
    Replies: 10
    Last Post: November 23rd, 2018, 08:19 AM
  3. Calc VET Again
    By pormgb in forum Gen III V8 Specific
    Replies: 6
    Last Post: September 8th, 2013, 02:54 AM
  4. Calc.VET, VET Map Average is all 0.0?
    By n8dogg in forum Gen III V8 Specific
    Replies: 3
    Last Post: July 15th, 2011, 01:20 PM
  5. Some PID's values don't fit in the chart...
    By joecar in forum General
    Replies: 6
    Last Post: March 17th, 2008, 04:00 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •