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Thread: On a Hell Cat is the stoic really 13.85?

  1. #21
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    I'll allow you to do your own testing but I will say this, I did not find any additional power out that lean. I'd rather have the added safety factor anyhow.

  2. #22
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    Quote Originally Posted by curt@injected View Post
    I'll allow you to do your own testing but I will say this, I did not find any additional power out that lean. I'd rather have the added safety factor anyhow.
    Lean is mean. I'm in the same boat, running that lean did not net any or at least not enough power to take the chance.

  3. #23
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    Quote Originally Posted by mxatunerjg View Post
    Lean is mean. I'm in the same boat, running that lean did not net any or at least not enough power to take the chance.

    Actually at 6000 feet DA I ran a best of 10.71 at 131.4 running pig rich. 11.3 on my dash. And yes they are extremely accurate. But that is on a stoic of 13.88.

    So a lambda of around .81. On E10 that would equate to around a 11.5 afr. 11.3 x 14.10/13.88

    Most tuners have the onboard dash readings set to around 11.6 to 11.8. Mine ran better richer.
    Last edited by CactusG8; 08-13-2017 at 08:44 PM.
    2016 Hellcat Challenger, automatic, black on black with brass monkey wheels

    10.13@ 140 DA 5000 feet
    2.75 pulley, tune, drag radials. 10 percent lower od crank pulley, 1050 ix. off road mid pipe. tune

  4. #24
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    yeah my 2014 mustang has stoich set to 14.08 from the factory, with virtually all gas being E10 thats just about right.
    It doesn't have to be perfect, it just needs to be done in two weeks...

    A wise man once said "google it"

  5. #25
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    Quote Originally Posted by CactusG8 View Post
    Actually at 6000 feet DA I ran a best of 10.71 at 131.4 running pig rich. 11.3 on my dash. And yes they are extremely accurate. But that is on a stoic of 13.88.

    So a lambda of around .81. On E10 that would equate to around a 11.5 afr. 11.3 x 14.10/13.88

    Most tuners have the onboard dash readings set to around 11.6 to 11.8. Mine ran better richer.
    I wouldn't necessarily consider that pig rich on a hemi. The hellcats are slightly different but for the most part the hemis tend to like to be a little fatter than any of the ford or gm stuff I've ever done.

    I question whether most of the other tuners have any clue what lambda they are actually commanding out of the car due to the way ds does their pe tables. That and I don't think ds has the widebands mapped in dataviewer.

    Also, I'd say .81 is a pretty good number.
    Last edited by curt@injected; 08-14-2017 at 11:06 AM.

  6. #26
    Why not just leave the everything set up for gas AFR (14.7) and always tune using that no matter the fuel? I have e85 in the tank but it still reads 11.9 at WOT just like it would if I was tuned for gas. Then you only have to remember one setup.

    Or just use lambda obviously. I have never changed my wide bands to say anything other than stoich of 14.7 and have been fine.

  7. #27
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    Lambda.