Stock Dyno thread

Discussion in 'SRT Hellcat Performance' started by HellDoc, Aug 21, 2015.

  1. HellDoc

    HellDoc The Doctor is IN!

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    Can we start a stock dyno thread so we can see variations car-car and dyno-dyno.

    Mustang Dyno, only mod Drag Radials
    631HP
    569TQ

    image.jpg
     
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  2. DB2

    DB2 Silver Member

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    Green air filter, aluminum shaft, drag radials. Mid 70's, Superflow AWD dyno
    20150504_182529.jpg
     
    Last edited: Aug 22, 2015
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  3. B5 Blue

    B5 Blue Platinum Member

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    We can but not sure what good it does with dyno operators that don't know what gear to use, traction control on, smoothing not all at same, manufacture's and whatever else that I've read on here. Me I know nothing about them just do timeslips
     
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  4. Nycsrt

    Nycsrt BANNED

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    Where the tempatures ?? Or maybe I'm
    Burnt and read the wrong dr Seuss hellcat and Green eggs and ham
     
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  5. HellDoc

    HellDoc The Doctor is IN!

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    Do you know what brand dyno?
     
  6. HellDoc

    HellDoc The Doctor is IN!

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    You would not dyno on a train you would not dyno on a plane?

    I'll ask if they can spit out environmental variables.
     
  7. mowe

    mowe Gold Member

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    Stock M6 - SAE - 70 degrees in April

    Dyno jet - the STD numbers were over 700

    686whp / 624 tq

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  8. jpg0511

    jpg0511 Senior Hellcat Member

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    647hp 639tq dynojet 6th gear 93degs and 70%humid
     
  9. Hemi1632

    Hemi1632 BANNED

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    I don't understand the point of this?

    I could care care less if I made a pull and it read 100 hp. All that I care about, is that If I make a change, and the Dyno now reads 105 hp I know that whatever I did just added 5% more power. The Dyno is not a measuring stick to see who has bigger balls. It is a tool to measure how much you have improved or hurt your performance.
     
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  10. HellDoc

    HellDoc The Doctor is IN!

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    When measuring upgrades, absolutely correct. Only matters before and after hopefully same dyno.

    But theoretically dynojet inertia drums and environmental corrections are supposed to have them somewhat standardized and the resistance dyno like mustang have significant variances.

    I was interested in what the spread of dyno results would be on stock (or close) hellcats. It's not dyno queen biggest ball comparison on stock vehicles, just a data point.
     
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  11. Teo

    Teo Judge Yooper

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    Bingo - Exactly! :D
     
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  12. Hemi1632

    Hemi1632 BANNED

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    Well I am not a doctor, but I do like to approach things in a scientific matter. So if your data is derived from different cars, on different dyno's, with different weather conditions, some cars are stock, some are "close" to stock, and let's not forget which correction factor did you use? SAE, STD, Uncorrected.........
    I would like to think that you don't have to be a doctor to realize that data that you are seeking is a little flawed. And to draw a hypothesis from this data would in my opinion not be recommended.
     
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  13. HellDoc

    HellDoc The Doctor is IN!

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    I don't know what your inclination is to create an online pissing match, but if you don't agree in the validity, don't participate. I was interested and posted in case others were interested as well. You apparently have nothing better to do then to disparage a thread that you don't agree with instead of ignoring it. Whats the motivation there? Why going out of your way to create negativity?

    I AM a PhD, coincidentally in data analytics, and if you care to read the dyno manufacturers documentation, companies like dynojet actually brag about their result consistency from dyno to dyno, measuring their inertial drums to a few decimal places and decades of altitude/temp/pressure/humidity adjustments. Regardless this was based on curiosity, not data mining.
     
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  14. rayzazoo

    rayzazoo DRIVESRT.COM Gold Supporting Member

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    For the dynos, in addition to Density Altitude, could we also post the intercooler temperature, engine coolant temperature, and intake temperatures at the time of the runs?

    From what I've seen with other Hellcat dynos and results, the optimal dyno temperatures are:

    Intake temp - 140-160 deg F
    Coolant temp - 190-210 deg F
    Intercooler temp - 116-120 deg F

    Of course, lower intake temperatures will produce better results, however, I think coolant temperature should be within that range.
     
    Last edited: Aug 23, 2015
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  15. Hemi1632

    Hemi1632 BANNED

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    Good questions!

    Oh boy, more data?!? Is this going to skew the curve even more???

    Hey Doc, are you starting to get the point? I guess I should have asked WHY you wanted to compare "car-car" and "dyno-dyno" numbers? Then I could have told you that you are introducing to many variables to make a valid comparison.
    Now as to why I am creating a so called "online pissing match" is because many people that have not owned a Dyno, run a Dyno, understood the use of a Dyno or even had their car on a Dyno. Are going to read this thread and think hey, this looks like good data and draw incorrect conclusions from it.

    I am not pissing, just trying to teach. But I guess that is where I went wrong, I couldn't think of teaching a doctor who went to school, has his PhD and can actually read about a Dynojet Dyno anything!
     
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