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Discussion in 'VF Holden Commodore (2013 - 2017)' started by Wayne001, Jul 24, 2018.

  1. Wayne001

    Wayne001 Member

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    Hi all thinking about getting a tune done on my vf 6ltr L77 calais . My motor is stock except for a set of headers of a hsv , any way was told by a company that does post tunes i can expect 350kw from there tune does this sound about right . I think my calais produces 270kw now and if it does that tune would produce another 80kw . Any input ?
     
  2. daves8

    daves8 Active Member

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    I have a 2015 calais with L77.

    I have a custom tune, headers, full exhaust and cold air intake and made 250 rear wheel kilowatt, which would be close to that figure of 350, maybe marginally less....... so 350 is optimistic.
     
  3. Forg

    Forg Well-Known Member

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    Wheel & chassis dyno’s are notoriously inaccurate, as they’re often calibrated somewhat high to make the customer (ie. the car owner) feel good.
    350kW flywheel guesstimated from wheel output of a tuned car would make sense, but largely because the wheel dyno’s probably reading 20-30 kW higher than real output.
     
  4. Wayne001

    Wayne001 Member

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    This is for a post in the mail tune .
     
  5. Pablito

    Pablito Active Member

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    I guess as a comparison.......... Walkinshaw claim 310kw for their L77 upgrade package. To get to that they install a full exhaust system, an OTR and a tune.
    I've seen other shops advertise an approximate 10% power increase from a tune alone.
    80kw seems an over inflated claim from what I've seen and read over the years anyway.
     
  6. vr304

    vr304 Well-Known Member

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    350 kw would be with an Otr headers and high flow cats also either 2.5 inch or 3 inch exhaust system to go with the tune
     
  7. Tryg

    Tryg Active Member

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    Not a chance...

    They’re quoting something difficult to measure.

    Stick to rear wheel dyno measurements.
     
  8. Forg

    Forg Well-Known Member

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    Is that because you don't need to change anything in the engine to get a "genuine" 400kW ATW, you just fudge the dyno instead?
     
  9. Tryg

    Tryg Active Member

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    It’s because the magical ‘at flywheel’ number can be magically inflated...how will you tell if the tune works without comparative before and after dyno runs?

    80kw with no mods and a tube in the post...keep believing it.
     
  10. Not_An_Abba_Fan

    Not_An_Abba_Fan Exhaust Guru

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    I will say yes, it's possible. The tune is what makes all the difference, but I would be wary of an 80kW increase without other mods, you can lean it out to produce more power but it's not very good for the engine. More peak kW doesn't necessarily mean better or faster. If you were to go with a mail order tune, I would recommend MACE, they also offer data logging and a free touch up tune.
     
  11. Wayne001

    Wayne001 Member

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    Sent them a email , they do not do mail order tunes for my car .
     
  12. Tryg

    Tryg Active Member

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    Are you against the notion of a proper dyno tuning? Personally, I would wait until you have done the breathing, in and out...then go get a good custom tune. Costs more than magic boxes, but the difference is night and day,.
     
    426Cuda likes this.
  13. Not_An_Abba_Fan

    Not_An_Abba_Fan Exhaust Guru

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    I thought that they would be by now, a few years ago they didn't do them but planned to.
     
  14. John Revill

    John Revill Active Member

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    Spot on @Tryg . You have to get a before and after. My old LS1 got a full tune on the dyno and before they started got 160kW. Once they had finished they got 227kW. If you work that out, it's a 41.9% increase. If you take the stock tune as factory stated at 225kW at the engine, that makes it about 320kW at the engine.
     
  15. Smashfist

    Smashfist Active Member

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    Yep you need before and after. My VF1 SS on the same dyno at the wheels made just over 280hp stock (~210kw), 350hp with bolt ons and dyno tune (~260kw), and 440hp (~330kw) with a 232/234/114lsa/.600lift camshaft.
     
  16. revster

    revster Active Member

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    I think I have mentioned this before. Not only do you need before and after but which before? My car which was spending its life in city traffic and driven conservatively usually, gained around 30-40 rwkw over 4 runs. Each run gained around 10rwkw. This was purely because the Ecu was readjusting after each pull and blowing away my sedate driving from its memory. The tuner made no changes at all.

    Since fitting the W557 and now knowing what I saw on the dyno, my driving habits have changed :)
     

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