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    1 out of 1 members liked this post. Yes Reputation No

    Only dynoed 304.9whp on DD

    Got my car dynoed for the the very first time at Rogue Engineering (thanks for getting me in Ben :thumbsupClick here to enlarge ). I've seen most cars dyno at around 320-340 stock. Best results with my car was 304.9 on a dyno dynamics. I'm stock except for my eisenmann race and running 93 octane.

    Fan was running but the hood was closed if it makes any difference. I asked for the file, but Ben said it's not available, so this is all I have:

    Click here to enlarge

    Is this normal? Should I be concerned? I'm getting a compression and leakdown test soon.

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    I wouldn't worry about the numbers too much, don't be concerned at all.

    DD's read different depending on the settings. Ask them what they set their multiplier at, that should explain everything.

    If you are really concerned about it just go dyno on a dynojet.

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    Thanks Sticky! I knew I could count on you.

    I'll ask Ben tomorrow about the multiplier. Anything else I should ask him?

    So if my compression/leakdown tests are fine I should be good to go with the SC right? Btw, what should I expect for compression/leakdown results?

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    Click here to enlarge Originally Posted by gixxer_kidd Click here to enlarge
    I'll ask Ben tomorrow about the multiplier. Anything else I should ask him?
    I think he will know what you are getting at with that. Just ask him how their DD compares to a dynojet, likely reads about 15% lower which would put you at about where you should be.

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    Click here to enlarge Originally Posted by gixxer_kidd Click here to enlarge
    So if my compression/leakdown tests are fine I should be good to go with the SC right? Btw, what should I expect for compression/leakdown results?
    Your compression and leakdown tests will be fine and yes, you will be good to go with an SC.

    Not sure what the numbers should be on an S65, I can find out though.

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    I think he will know what you are getting at with that. Just ask him how their DD compares to a dyno dynamics, likely reads about 15% lower which would put you at about where you should be.
    Do you mean compared to a dyno jet?

    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Your compression and leakdown tests will be fine and yes, you will be good to go with an SC.

    Not sure what the numbers should be on an S65, I can find out though.
    If you could find out the numbers that would be great. Thanks in advance!

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    Curve looks fine. That's what a real un $#@!ed with dd dyno will read.

    BG

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    Click here to enlarge Originally Posted by gixxer_kidd Click here to enlarge
    Do you mean compared to a dyno jet?
    Yep, sorry, meant compared to a dynojet, yes.

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    Click here to enlarge Originally Posted by BrenM3 Click here to enlarge
    Curve looks fine. That's what a real un $#@!ed with dd dyno will read.

    BG
    Exactly.

    Do you know what his compression/leakdown results should look like?

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    Click here to enlarge Originally Posted by BrenM3 Click here to enlarge
    Curve looks fine. That's what a real un $#@!ed with dd dyno will read.

    BG
    That's good to know. I'm so clueless when it comes to this stuff. Feel like such a newbie. hahaha

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    Click here to enlarge Originally Posted by gixxer_kidd Click here to enlarge
    That's good to know. I'm so clueless when it comes to this stuff. Feel like such a newbie. hahaha
    You will learn quickly, right place for it.

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    Yet to see a compression that was low on a stock or bolt on car. Just a poorly tuned s.c car Click here to enlarge

    BG

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    Click here to enlarge Originally Posted by BrenM3 Click here to enlarge
    Yet to see a compression that was low on a stock or bolt on car. Just a poorly tuned s.c car Click here to enlarge

    BG
    Yes, but what should the numbers be so he knows what to look for?

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Yes, but what should the numbers be so he knows what to look for?
    Also should these tests be performed while the engine is hot or cold?

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    Click here to enlarge Originally Posted by gixxer_kidd Click here to enlarge
    Also should these tests be performed while the engine is hot or cold?
    Warmed up.

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    Just talked to Ben, they don't have the values stored. =/ Next time I'll make sure to record all these values.

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    They don't have the values stored? That's weird, they should simply know unless they are changing them daily.

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    yeah its either ben has no idea how to run the dyno, OR odds are its an unmolested DD so it reads like that - just like Gintani's.

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    Click here to enlarge Originally Posted by BrenM3 Click here to enlarge
    yeah its either ben has no idea how to run the dyno, OR odds are its an unmolested DD so it reads like that - just like Gintani's.
    To be fair, I think Gintani has used various multipliers.

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    Click here to enlarge Originally Posted by BrenM3 Click here to enlarge
    yeah its either ben has no idea how to run the dyno, OR odds are its an unmolested DD so it reads like that - just like Gintani's.
    do you lose the values after you shut down the machine? i have no idea how this works since this is my first dyno. next time, i'm going to record everything.

    he did mention that i'm inline with other m3's that they've dynoed. also on another forum, a few people are saying gintani's dyno is yielding similar results on stock cars.

    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    They don't have the values stored? That's weird, they should simply know unless they are changing them daily.
    from what i was told, the values are entered manually from the weather station:

    Barometric Pressure = BP
    Relative Humidity = RH
    Ambient Air Temperature = AT

    according to him it changes everyday which makes sense. i thought the dyno would at least store that information with my run.

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    Click here to enlarge Originally Posted by gixxer_kidd Click here to enlarge
    from what i was told, the values are entered manually from the weather station:

    Barometric Pressure = BP
    Relative Humidity = RH
    Ambient Air Temperature = AT

    according to him it changes everyday which makes sense. i thought the dyno would at least store that information with my run.
    Yes, it corrects based on weather but the output can still be changes with a multiplier which the operator sets.

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Yes, it corrects based on weather but the output can still be changes with a multiplier which the operator sets.
    so they enter the 3 values and then they can also overrride it with a multiplier? do they have to enter the multiplier? i guess this is where an operator can fudge the numbers? either way it seems like the number can be fudged if they change any of the inputs.

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    Click here to enlarge Originally Posted by gixxer_kidd Click here to enlarge
    do they have to enter the multiplier? i guess this is where an operator can fudge the numbers? either way it seems like the number can be fudged if they change any of the inputs.
    Yes, the operator can easily change the numbers.

    This why they provide dyno dynamics with a shootout mode where it can not be changed but no one uses it.

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Yes, the operator can easily change the numbers.
    Now I see why having the correction factors are important.

    Seems like there are too many variables, that even the same car on the same dyno on different days would produce different numbers.

    With my number being so low, I'm afraid to find out what my numbers will be after the SC. I guess I should focus on the % change vs the absolute whp #?

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    On that kind of dyno - all you do is hit control Z and input the number(percentage) you want over the baseline.

    Gixxer - don't read so much into this, life is short man lol. Go on a dynojet if you want to compare to everyone else.

    Sticky - The only other multipler I've seen them use was pre-software, wasnt a multiplier but an old version of software. They aren't afraid of low numbers.

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