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Thread: Dyno Analysis

  1. #1
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    Dyno Analysis

    Hi folks,

    Would be keen to get some comments / analysis on the good, bad or otherwise on this dyno graph.

    I'm pretty happy with both the numbers and the drivability and would be happy to share details of the build if anyone's interested.

    I find the dip in AFR from 2500rpm intriguing and of course can't help but wonder if there's room to squeeze out a bit more

    First Tapatalk, hope I've done it right!


    Sent from my iPhone using Tapatalk

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    Smart like tractor Ben-e-boy's Avatar
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    Does this motor have an aftermarket/custom cam? With the stroker kit? (I saw this graph on FB but didnt read the comments)

    That fuel it is dumping in from about 2700 is abit odd. I have seen a similar looking graph for a td with a custom cam.

    EDIT: scrap that I found and read the post on FB.
    Last edited by Ben-e-boy; 14th February 2017 at 02:48 AM.
    96 GQ coil/Cab
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    Patrol God nissannewby's Avatar
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    Wasnt done at gturbo was it?

    The turbo seems to be struggling to do anything from the peak kw point. Then the fuel pump is pulling a lot of fuel out from like 3400rpm.

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    Patrol God nissannewby's Avatar
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    Quote Originally Posted by Ben-e-boy View Post
    Does this motor have an aftermarket/custom cam? With the stroker kit? (I saw this graph on FB but didnt read the comments)

    That fuel it is dumping in from about 2700 is abit odd. I have seen a similar looking graph for a td with a custom cam.

    EDIT: scrap that I found and read the post on FB.
    Its not so much fuel being dumped but the turbo has run out of legs and cannot pruduce enough air to accomodate the fuel. Probably has a small rear housing to get it to spool and generate the torque early which is restricting the efficiency.

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    Yeah it's running a gturbo bad boy set up mated to an ADS 12mm pump. Opted for the billet stroker kit to be done with the crankphobia.

    Thanks lads, smaller housing theory makes sense in explaining the graph.

    In truth I'm not sure if I'll change it out, pretty rare to need to go over 3000rpm with this tune.

    I'm not running a lift pump yet and had wondered whether it may have been something to do with the pump.


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    Patrol God nissannewby's Avatar
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    Cool. I thought it was gturbo. As long as your happy thats all that counts.

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    Smart like tractor Ben-e-boy's Avatar
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    Quote Originally Posted by nissannewby View Post
    Its not so much fuel being dumped but the turbo has run out of legs and cannot pruduce enough air to accomodate the fuel. Probably has a small rear housing to get it to spool and generate the torque early which is restricting the efficiency.
    Yeah I see better now I'm on my tablet
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  9. #8
    Smart like tractor Ben-e-boy's Avatar
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    Quote Originally Posted by Mr Trol View Post
    Yeah it's running a gturbo bad boy set up mated to an ADS 12mm pump. Opted for the billet stroker kit to be done with the crankphobia.

    Thanks lads, smaller housing theory makes sense in explaining the graph.

    In truth I'm not sure if I'll change it out, pretty rare to need to go over 3000rpm with this tune.

    I'm not running a lift pump yet and had wondered whether it may have been something to do with the pump.


    Sent from my iPhone using Tapatalk
    Do you know what the billet crank and rods weigh compared to standard?
    96 GQ coil/Cab
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  10. #9
    Patrol God nissannewby's Avatar
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    Quote Originally Posted by Ben-e-boy View Post
    Do you know what the billet crank and rods weigh compared to standard?
    And were they balanced prior to installation?

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    Quote Originally Posted by Ben-e-boy View Post
    Do you know what the billet crank and rods weigh compared to standard?
    Afraid not mate, I asked the question but he didn't do a comparison


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