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

  1. #681
    Joe (Moderator) joecar's Avatar
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    Yes, correct, a placeholder, you can use any logged pid here.

  2. #682
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by pinstripebob View Post
    Alright so I loaded your tune and did some logging. I did three logs (really just two, the first was a quick spin around the block). I wasn't able to get some good time with high load/throttle opening. So today on my way to work, I used a stretch of fairly flat highway to log high load/throttle opening. I got a log there and one back. The log there seemed to give me pretty good data. It looks like my B5001 wants to come down a hair, and most of the data for B0101 wants to bump it up a bit. Can you take a quick look and make sure I'm on the right track with my thinking? I've attached my later two logs, and a modified tune based off the first log.


    First log:
    Attachment 20069
    Secong log:
    Attachment 20070
    Tune:
    Attachment 20068
    I'll take a look at these tomorrow, sorry I'm running behind.

  3. #683
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    No worries! I've kind of gotten addicted to this whole tuning thing. I've attached my latest tune for reference, but now I'm going after knock retard. For some reason I'm getting a few degrees of knock retard kicking in around 2800-3600 and .40-.64 grams/cyl. I've gotten to the point that B5001 is just about 1.00 after some logs.

    Garrett_GTO_tuned_20160821_1.ctz

  4. #684
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    hey guys, I've been MIA, but back into a C5 vette so back into the tuning world! 1 of my LC-1's crapped the bed last night, I'll have to get my 2nd one up and running. I shut the door on the cords and I think I pinched a wire that didn't want to be pinched, darn!

    Anyhow, I question about the Calc Vet VE map. In the how-to it says to use "Calculated VE %, BEN corrected" for the map data. When I use this, I get decimals as data, lower regions are around .5, upper regions 1.0, 2.0, 3.0, 4.0, 5.0. Why? Why isn't it a percentage like the VE table? If I replace "Calculated VE, BEN corrected" with "Calculated VE %", the data shows as it should. But don't I want the BEN corrected VE %?

    If needed, I'll post up my log and PID's when I get home from work.

    Thanks!
    2002 Z06
    Vengeance Racing Stage 5, H/C/I/3.90 diff, 575 hp
    2016 Chevy SS M6 (daily driver)
    Roto-fab Intake

  5. #685
    Joe (Moderator) joecar's Avatar
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    Post screenshots so I can see what is going on.


    Use VE [g*K/kPa] instead for VE (in tunetool go Edit->Properties and set VE units to g*K/kPa).

  6. #686
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    Quote Originally Posted by joecar View Post
    Post screenshots so I can see what is going on.


    Use VE [g*K/kPa] instead for VE (in tunetool go Edit->Properties and set VE units to g*K/kPa).
    Thanks Joe, I figured it out. My OS is not compatible with Dyn Air Temp in the standard Calc VET PIDs file. I had to use the alternative. I did switch the VE table over to g*K/kPa, made life a little easier!

    Question in regards to Lambda/AFR. Stoich setting in the PCM is 14.68 assuming 100% gasoline. We have (up to) 10% ethanol in our gas here. While I'm performing Calc VET tuning do I need to make any adjustments to the stoich/target AFR in the PCM? Or is that irrelevant when we tune the VE/MAF tables for lambda 1.0? Thanks!
    2002 Z06
    Vengeance Racing Stage 5, H/C/I/3.90 diff, 575 hp
    2016 Chevy SS M6 (daily driver)
    Roto-fab Intake

  7. #687
    Joe (Moderator) joecar's Avatar
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    Yes, for E10, set B3601 to 14.2.

  8. #688
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    But in my log Lambda averaged at 1.002. Does this indicate that E10 isn't actually 10%?Nate 02Z Calc Vet 4 18 17.efi
    2002 Z06
    Vengeance Racing Stage 5, H/C/I/3.90 diff, 575 hp
    2016 Chevy SS M6 (daily driver)
    Roto-fab Intake

  9. #689
    Joe (Moderator) joecar's Avatar
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    Yes, correct.

    I'm told that alcohol content in gasoline can be +/-8%... i.e. your E10 can be close to plain gasoline.

    ~ by phone ~

  10. #690
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    Quote Originally Posted by joecar View Post
    Yes, correct.

    I'm told that alcohol content in gasoline can be +/-8%... i.e. your E10 can be close to plain gasoline.

    ~ by phone ~
    Wow! No wonder why sometimes after getting gas it feels like I gained some hidden power! Guess I'll stick to the gas station that yields me the closest to Lambda @ 14.68 AFR.
    2002 Z06
    Vengeance Racing Stage 5, H/C/I/3.90 diff, 575 hp
    2016 Chevy SS M6 (daily driver)
    Roto-fab Intake

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