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Remapping VN ecu

Discussion in 'VN - VP Holden Commodore (1988 - 1993)' started by Burning rubber, Sep 16, 2018.

Itsva good idea

  1. Heck yea

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  2. F$@K yea

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  1. Burning rubber

    Burning rubber Member

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    Hi guys, I wanna remap my VN ecu so it runs leaner... I want a nice light grey exhaust not a black one... and a heavier pocket
    Is there some way I can remap it or do I need to find an aftermarket ecm?

    It’s a stock SPac V6 sedan with an auto
     
  2. losh1971

    losh1971 Well-Known Member

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    You need your memcal retuned. BTW black exhaust is quite normal since Super is no longer available.
     
  3. Burning rubber

    Burning rubber Member

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    I thought black exhaust was normal on all newer cars
     
  4. immortality

    immortality Moderator Staff Member

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    You'll never get rid of the black exhaust unless you run leaded fuel....

    Remapping is easy enough, get yourself a UV eraser and chip burner. Download Tunerpro and the relevant tune/definition files from the PCMHacking forum and go for gold.
     
  5. losh1971

    losh1971 Well-Known Member

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    then why are you trying for a grey exhaust?
     
  6. Burning rubber

    Burning rubber Member

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    Aeroplanes run a grey exhaust
    Dad has 2 cars and they both have a grey exhaust

    They are both carbureted but that shouldn’t make any difference


    Because I want my car to run lean (grey) not rich (black)
    All new cars are tuned in the name of the environment, but when I look at the exhaust I think otherwise
     
  7. immortality

    immortality Moderator Staff Member

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    Planes still use leaded gas.

    My old 308 loved avgas and got a dose with every tank of the unleaded stuff that made it run like crap. I wouldn't be surprised if your old man is topping up his car tanks at the airfield...
     
  8. losh1971

    losh1971 Well-Known Member

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    Like i said grey exhausts pretty much ended once they discontinued super. Planes run similar fuel to super hence the grey exhaust. If you want grey exhaust then yeah remap your own chip and lean it right out. Once you destroy your engine you will work out that leaning out is actually a bad thing.
     
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  9. Burning rubber

    Burning rubber Member

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    Planes used to run leaded gas... now it’s removed but still a higher octane

    He does top up at the airfield
    But I drove one for over 300kms and used 91 octane and got the same result
    The planes will have a black exhaust if they run rich fuel mixture but we most of the time lean them right out
     
  10. losh1971

    losh1971 Well-Known Member

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    Pretty hard to get Avgas in Australia. Even with a permit to go on airfields they won't let you fill up a jerry can, unless its aviation fuel approved container. Used to be easier to get avgas 15 or so years ago at the race track until they banned the sale.
     
  11. Burning rubber

    Burning rubber Member

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    Such sas much wow

    Leaning an engine right out will destroy it but I’m not going that far
    Leaning it out is better that it running rich like no carbon build up
    And like I said the car I drove, I previously drove (from Sydney to Darwin) with no problem and that grey exhaust
    The same deal for the other car, same carburettor setting for 10 years now and no problems
     
  12. Burning rubber

    Burning rubber Member

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    We drain it from the aeroplane wings when we do fuel calibrations and take it home
    And the only “approved container” I know of is a 44 gallon drum
    Which you can order from shell or BP
     
  13. losh1971

    losh1971 Well-Known Member

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    Ok dude you're the expert...... Weren't you the young bloke that removed the crank pulley on his VN using a big peice of pipe, instead of a proper puller?
     
  14. immortality

    immortality Moderator Staff Member

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    If I'm not mistaken Avgas 100 LL is Low Lead but still has lead in it.

    Yes you can lean cruise a car and many efi cars already do this from the factory, in fact some Holden V6 engines lean out to almost 18:1 in lean cruise mode.
     
  15. losh1971

    losh1971 Well-Known Member

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    Have you even pulled the plugs to see if the engine is running rich?
     
  16. losh1971

    losh1971 Well-Known Member

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    My ute will go into lean cruise and it did that before I had a new memcal fitted.
     
  17. Burning rubber

    Burning rubber Member

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    Improvising will always be criticised
    I didn’t have a puller and I barley had the money for a sensor... sooooo


    But the vn isn’t an efi is it?
    It’s a pretty basic motor
    It still uses more fuel than most of its type
    And I go lightly on the pedal


    The Lead has been lowered to just about non existent
     
  18. Burning rubber

    Burning rubber Member

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    Yyyyyyyeap
     
  19. immortality

    immortality Moderator Staff Member

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    Yep, lean cruise is standard on these models.

    You my young padewan have much to learn....
     
  20. immortality

    immortality Moderator Staff Member

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    Early VN's had a slip fit balancer and can be removed without a puller.... ;)
     
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