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Thread: 4.2tdi dyno run

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    Advanced menis's Avatar
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    4.2tdi dyno run

    Does this look about right fellas? Looks like a fair bit for pretty stock...
    Mods are :
    3" straight through exhaust
    T boost
    Blocked egr and butterfly removed
    And running 305/70-16 tyres

    Sent from my SM-G930F using Tapatalk

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    The master farter
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    Seems about right to me for a near stocky... How does it feel to drive?

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    Patrol God nissannewby's Avatar
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    How boost are you running? JPC do seem to read higher than others but is hard to say without seeing a dyno pre tune as such.

    What isnt right is the dips in the curves someone who doesnt know what they are has played with your injector pump.
    @MudRunnerTD knows all about this on a td42ti engine.

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    Feels heaps better mudski, its a different car!!

    Nissannewby the boost peaks abouts 16psi, the pink is the first run and the blue is after they have tuned it...

    A mate of mine said the probly done the run in 3rd instead of 4th?

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    Patrol God nissannewby's Avatar
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    Yeah they always look like they are done in 3rd but other guys here reckon they get done in 4th but the speed readout says otherwise.

    Do you know if jpc or anyone has adjusted the timing at all?

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    Yeah a mob in bendigo done the timing a few years ago, is that why it dips a bit on the graph?
    Is that a bad thing?
    Sorry i dont know much about it

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    Patrol God nissannewby's Avatar
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    Quote Originally Posted by menis View Post
    Yeah a mob in bendigo done the timing a few years ago, is that why it dips a bit on the graph?
    Is that a bad thing?
    Sorry i dont know much about it

    Sent from my SM-G930F using Tapatalk
    Yes it should be a fairly nice hump sort of look. Or even quite a good rise to your peak number then just tapers off until the end of the run. I will post one up to show you the difference.

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    Patrol God nissannewby's Avatar
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    The dieseltec one is @MudRunnerTD run. You can see the drive in tune (blue line) has a dip in the midrange. The other caboolture one is a bit more setup but shows what Im trying to describe in the power and torque curves. You can also see why the JPC one is most likely in 3rd gear these 2 runs go out beyond 120km/h in 4th.

    IMG_1272.jpgIMG_4926.jpg
    Last edited by nissannewby; 19th July 2017 at 07:46 PM.

  10. The Following User Says Thank You to nissannewby For This Useful Post:

    MudRunnerTD (19th July 2017)

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    Moderator MudRunnerTD's Avatar
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    Yeah it's a shame there is no rpm reading in the Dyno from JPC but peak power at 60km/h is a full gear different I'd say for sure. Makes the power curve nice and steep but reflects a 3rd gear run rather than a bigger 4th gear ratio.

    As Matty says the curve looks pretty lumpy. I note also your untuned run saw mid 70s and factory they generally produce in the 60s especially running 305s.

    I had mine tuned 3 times at 3 different tuners over 7 years and Always had issues with extreme exhaust temps. Watch out for your exhaust temps. Do you have a pyro gauge? If you don't then it should be the next thing you buy! Especially with a tune like that. That's pretty good power out of a stock turbo so I wonder how close to the line your running mate.

    On Mattys advice I paid to have my pump timing done again and it was found that my pump was advanced and made bad power. Resetting the timing to Factory settings and Undoing the half assed tunes done before transformed the car.
    Last edited by MudRunnerTD; 19th July 2017 at 09:11 PM.
    Its a Nissan! =====> Its a Keeper!! ....... Got a TD42 in it BONUS!! ....... I'm a lucky bugger! I've got 2 of em!
    Check out my Toy --> MudRunnerTD's GQ From the Ground Up

    Quote Originally Posted by Rogue Dung Beetle View Post
    Wish it was Nissan though, Toyotas just can't keep up with the Pootrol pace.
    The only good thing about an 80 series is..... the front end?? Wrong!!, the Engine?? Wrong!! the Full Time 4WD system?? Wrong!! Its the NissanPatrol.com.au stubby holder fitted over the transfer lever.
    WARNING: Towballs used for recoveries can, and do kill people and damage property.

  12. #10
    Moderator MudRunnerTD's Avatar
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    Quote Originally Posted by MudRunnerTD View Post
    So here are the tell all sheets!

    All reports show the Blue line as the Drive in Baseline measurement.

    First report is tuned to 108kw and 393Nm of Torque. Note the steady climb in power peaking at 2620rpm. I was making about 60kw at cruising hwy speed of 2000rpm. Not ideal. I'd be forced to tow in 4th just to get into the power band

    First Tuned Run. No pump timing check



    Bit the bullet and retarded the timing back into factory specs.

    Ta Da!!



    Quote "Takes a lot to Impress me..... I'm Impressed!" Completely moved the power curve back into position. Boost came on and stayed!

    Epic!!

    So by now the car was suffering from Heat Soak and every Dyno run was loosing so we had to rest it to cool.

    Bloody happy though.

    Here is my Mock Up of the 3 runs over each other. Sorry I did not get the 16g run but it's basically the same but earlier.



    Holy Bjeezus!!


    Sent from my iPhone using Tapatalk
    Taken from my Upgrade thread
    Its a Nissan! =====> Its a Keeper!! ....... Got a TD42 in it BONUS!! ....... I'm a lucky bugger! I've got 2 of em!
    Check out my Toy --> MudRunnerTD's GQ From the Ground Up

    Quote Originally Posted by Rogue Dung Beetle View Post
    Wish it was Nissan though, Toyotas just can't keep up with the Pootrol pace.
    The only good thing about an 80 series is..... the front end?? Wrong!!, the Engine?? Wrong!! the Full Time 4WD system?? Wrong!! Its the NissanPatrol.com.au stubby holder fitted over the transfer lever.
    WARNING: Towballs used for recoveries can, and do kill people and damage property.

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