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Type: Posts; User: Grant

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  1. Replies
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    I tune on a 2009 manual Challenger PCM, and it...

    I tune on a 2009 manual Challenger PCM, and it definitely does not use Pedal Follower mode. I wish it did! Getting the throttle perfect without PF has been so frustrating I'm looking at standalone...
  2. Turns out I do have 39020 Airflow Max/RPM. Those...

    Turns out I do have 39020 Airflow Max/RPM. Those figures are similar to my limits at lower RPM, but are way too high at higher RPMs. It is definitely not strictly an airflow limit. I halved my...
  3. Whoops, didn't notice hemituna's responses: ...

    Whoops, didn't notice hemituna's responses:

    Yup, I fixed it last night by reverting all TB settings to stock. Thanks! This caused cruised-control problems, and the lightning bolt icon to flash on...
  4. Unfortunately this realization doesn't seem to...

    Unfortunately this realization doesn't seem to have helped me figure out how anything else is working:

    Actual torque -> airflow is still far short (67-82%) of logged Total Airflow.
    Actual torque...
  5. I have figured one thing out: the torque to...

    I have figured one thing out: the torque to airflow equation is definitely as presented by HPTuners: airflow = (torque - offset) / factor

    If I apply the above equation to the Aircharge to Torque...
  6. Thanks for the log. That is very illuminating,...

    Thanks for the log. That is very illuminating, but you can log so much more stuff than me I'm not sure how applicable it is to my old NGC4 PCM. Demanded torque and desired airflow would make things...
  7. 1.5V of sonic airflow airflow yes, but you should...

    1.5V of sonic airflow airflow yes, but you should need much more voltage in real-world conditions (per the phi table). I've modeled all this out and there's definitely a break at larger pedal...
  8. This is not the case with my car. Pedal inputs...

    This is not the case with my car. Pedal inputs which should result in an airflow request of say 127 g/s do not correspond to the 127 g/s throttle body voltage. This is because the throttle body...
  9. I tried two things tonight: 1) Doubling the...

    I tried two things tonight:

    1) Doubling the Power % Request (Flywheel) table. This had no effect on peak part-throttle body voltage for a given RPM.

    At WOT with Pedal WOT = 5 volts, I did...
  10. Yes, an Arrington 90mm on a 449 ci motor....

    Yes, an Arrington 90mm on a 449 ci motor. Smoothness I can tune in, but I have not yet been able to get the throttle to behave in a linear manner at higher pedal voltages (see link above).


    ...
  11. One thing I've noticed is that Calculated Load...

    One thing I've noticed is that Calculated Load quickly hits 100% as you're rolling the throttle on. This seems significant, since the PCM appears to have an artificially low load / airflow limit. I'm...
  12. I tried changing Throttle WOT to it's NGC3 value...

    I tried changing Throttle WOT to it's NGC3 value of ~1.5 V, but that didn't seem to do anything. Same goes for messing with the Power % Request (Flywheel) table.

    Total Airflow's behavior is...
  13. Thanks, do you have any problems with the ETC...

    Thanks, do you have any problems with the ETC doing funny things when you're trying to modulate the throttle in lower gears? Or is it all smooth and progressive?
  14. My car (naturally aspirated) drives like total...

    My car (naturally aspirated) drives like total crap unless the Small / Large Range tables differ from the TB Airflow Model. I need to adjust them to give more throttle on tip-in at low airflows, or...
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    I was trying to write a 2009 manual Challenger OS...

    I was trying to write a 2009 manual Challenger OS onto a Dodge Ram PCM. I eventually just got a Challenger PCM.
  16. Does anyone know how this is done? Does the PCM...

    Does anyone know how this is done? Does the PCM apply WOT VE to the above 19645 table to it to get maximum torque? It doesn't seem to be doing this in my case. I'm having the same problem as HaasExp:...
  17. So it is possible to get these PCMs to drive like...

    So it is possible to get these PCMs to drive like stock with a turbocharger? Or will you always be chasing some drivability issue?
  18. How streetable can you get a 6.1-based turbo build?

    I recently added a manual transmission and larger cam to the 6.1-based 7.4L hemi in my SRT8 Magnum. As I tune out the plethora of drivability issues (mostly with the throttle body range tables), I've...
  19. Replies
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    Is 'write entire' disabled on NGC4s?

    All I see is:

    Write Calibration
    SKIM Disable for retrofit
    Do Not Write

    This is an NGC4 PCM swapped into a 2006 SRT8 Magnum. Everything else works as expected. I do see the option on my...
  20. Here's some relevant passages from the service...

    Here's some relevant passages from the service manual:
  21. Request: a way to disable these TCM codes, enabling LX transmission swaps

    Though I have the following trouble codes disabled in my transmission tune, they pop up anyway. I can clear them with VCM scanner, but they come back each key cycle. They're only visible when...
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    Ok I think I found the problem. I can only get...

    Ok I think I found the problem. I can only get one of the rev limit strategies to work at once. With only spark cut enabled the RPMs are limited to just over the extreme cutoff. If I enable ETC with...
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    Well this was my first attempt at recreating your...

    Well this was my first attempt at recreating your tune 10_SS. The results were the same as my original ones; 5335 RPM peak on a 4000 RPM extreme cutoff. On the worst over-rev, the rev limit flag in...
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    Thanks, I'll try those settings and report back....

    Thanks, I'll try those settings and report back.

    I did start with stock settings; that's how I saw 7600 RPM. The above settings are just where I ended up after a lot of fiddling (none of which did...
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    E38 (2007 Z06) rev limit overshoot

    I have a very light (17 lb) Tilton clutch and flytwheel setup in my C6, and noticed the rev limiter did a very poor job at limiting revs during first gear wheelspin or revving in neutral. I've logged...
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