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E-85 cold start problem

Discussion in 'VF Holden Commodore (2013 - 2017)' started by christov, Jul 26, 2014.

  1. Jingle Bells

    Jingle Bells Guest

    You seem to be the last post of knockers....so tell me this....how do you tune a VF SV6 to run on E85...what do actually do....dyno tune sounds all the go ???... but what do actually do you do to the motor....logic says you must re-programme the computer.

    I wait with baited breath....and this will sort out the knockers from the doer's!
     
  2. AirStrike

    AirStrike Administrator Staff Member

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    The threads about a V8..................
     
  3. Jingle Bells

    Jingle Bells Guest

    OK a v8 then...if you know...I am interested.
     
  4. AirStrike

    AirStrike Administrator Staff Member

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    It's retuned via the ECU..........not that hard to understand.
     
  5. one_and_only2004

    one_and_only2004 Turbo L98 FTW

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    You may need to upgrade the injectors to a larger size to compensate for the extra fuel, maybe even the fuel pump. Plug computer in, change commanded afr from 14.8 to 9.7, adjust VE tables, adjust timing to take advantage of e85, Job done.


    If you were really tricky you could wire in a flex fuel sensor like an SS and run whatever fuel you want all the time, otherwise you'd have to run dual fuel (like I used to) and have two seperate tunes. These days you can even use a virtual flex sensor controlled by a toggle switch so you don't even need to flash a seperate tune in, just make sure the tank is near bone dry before filling up and changing fuels/tunes.


    It's not rocket science and you need to stop being so scared of it.
     
  6. 07GTS

    07GTS Well-Known Member

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  7. Jingle Bells

    Jingle Bells Guest

    thanks...now we are getting down to tin tacks....how do you retune the ECU....and what equipment do you need ?
     
  8. one_and_only2004

    one_and_only2004 Turbo L98 FTW

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  9. hotrod

    hotrod Banned

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    ethanol fuel is like comparing light beer to heavy beer , I know which I prefer heavy ., AH......now that's the s@#$ .
     
  10. AirStrike

    AirStrike Administrator Staff Member

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    Because you know about performance vehicles and all.............
     
  11. hotrod

    hotrod Banned

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    yep they all get you to a to b then back again , no matter performance why have all that power and unable to use it , unless you break the speed limit, or be the first to get to the next red light.
     
  12. Drawnnite

    Drawnnite Obviously Unsensible

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    or you know...
    you can go to an official track day....
     
  13. one_and_only2004

    one_and_only2004 Turbo L98 FTW

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    Just for trivia regarding the VF SV6 - straight from the holden page:

    Recommended fuel E85, ULP or PULP


    Looks like you don't need to do anything to run it.
     
  14. Jingle Bells

    Jingle Bells Guest

    Spot on.....what is with all this kurfudle over retunes for VF models is mind bogging....I also note the power and torque figures quoted are using 98 RON (PULP) for all variants of engines both 6's and 8's.....so I am totally confused as to why they would want to retune for E85 and another retune for 98 Ron....the only thing I can envisage their engines are clapped out/vintage...or they want to go from 0 to 100kmh in 2 seconds.
     
  15. duaned

    duaned Active Member

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    You're tripping on fresh air Jingle Bells!
     
  16. Drawnnite

    Drawnnite Obviously Unsensible

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    my understanding is that the OEM tune would be of a compromised set up or not to optimum levels.
    by having it retuned gains can be made and if done properly it can be made to run at an optimum level for the fuel.

    and especially by the sounds of it from others, the e85 tune is not exactly the bees knees from the factory.
    so why not have it retuned for it to run properly?
    consider it like basic maintenance, you don't let your air filter stay clogged, you change it to one that will flow to its proper levels.
     
  17. one_and_only2004

    one_and_only2004 Turbo L98 FTW

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    Worst thing you can assume is that I'm on your side - you have absolutely no idea what you're on about. Even playing with a stock standard VE SS tune with my laptop and wideband I managed to make it a lot more responsive and use less fuel and still run in the parameters of safety. E85 will gain you more power, on average a more agressive tune over factory will net you about 20kw - I know this for a fact.
    I haven't played with an SV6 tune wise yet but I've got one to try on next week, but I'm expecting to find some sort of gains even if it's just down low.
     
  18. Sandman

    Sandman Challenge Accepted

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    What tuning software are you using Julian?
     
  19. one_and_only2004

    one_and_only2004 Turbo L98 FTW

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  20. hotrod

    hotrod Banned

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    buy the real fuel , problem solved or run around like a headless chook to make it run at its peck , wasting money on tuning it to ethanol 85 and for what 5c cheaper at the pump than 91-95% octane fuel . and like you said not all petrol stations stock E-85 so why bother , add a octane booster in the tank .
     

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