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Stage 1 (OTR / headers) tune results

Discussion in 'VF Holden Commodore (2013 - 2017)' started by Nefarious78, Aug 12, 2018.

  1. Nefarious78

    Nefarious78 New Member

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    Hi

    Got my vf2 6.2l CALAIS tuned w/tri-y 1 3/8 headers, 200 cel cats & vcm OTR

    Havent driven tuned car before but after 6 or so months there are a few things im not sure are in my head, expectations are wrong or just gotten used to.

    Cars auto and wheels dont spin on take off. Torque certainly there around 3.5-4.5rpm but also feel power comes in late (not till at least 120-130 according to graph ;) )
    Anyway anyone who has comments or can show their dyno graph for similar would be great.

    Otherwise might think about second tuners opinion and potential cam upgrade.

    Another note is was tuned 38-40 degrees heat not sure what effect would be.

    Cheers
     
  2. _R_J_K_

    _R_J_K_ Well-Known Member

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    Modern car, would largely attribute it to traction control and anti-abuse.

    Having said that, tuning isn't a tick box exercise, lots of variables and lots of differences between individual tuners. Guessing a lot go for numbers at WOT rather than part throttle response, particularly with Commos. If you're not happy you should see what they can change for you, although six months later might be a bit long.
     
  3. Nefarious78

    Nefarious78 New Member

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    Thanks. Yeah took it back had a hole in left cat so that didnt help. Have shot a msg and will get them to check again.

    Wasnt really asked what i wanted out of it, but being noob wouldnt have known anyway.

    Looking at dyno chart the AFR seems odd comparing to others on dyno thread. The AFR is around 15.3 which seems lean and drops right down to 12.5 over the run.

    Response to me seems poor but its probably the way i drive it. Might be used to the power too. Getting "285rwkw" but that differs on dynos as you noted.

    Reputable tuner i am led to believe though. Not naming them as may come across negative.

    Cheers
     
  4. Tryg

    Tryg Active Member

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    you can expect 285-301rwkw from OTR, headers, full exhaust and a tune.

    you could expect 325-350rwkw with the addition of a cam.
     
  5. Nefarious78

    Nefarious78 New Member

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    Thanks for reply. Yeah considering cam but mostly to get more torque rather than top end rwkw. Supercharger obvious choice but then just moving into crazy territory

    Atm got really poor fuel economy not sure why. Getting less than 400km to a tank driving like a grandma (lot of short trips though) will get tuner to look at it again and discuss cam i think.
     
  6. Tryg

    Tryg Active Member

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    [​IMG]

    Blue line is just OTR, headers, exhaust and tune. The red line is with cam and another tune. 438rwhp and 743nm.
     
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  7. Tryg

    Tryg Active Member

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    You can expect that with a cam and the rest, but you shouldn't be there just yet... I get about 440km/tank with those numbers. Mostly driving in town.
     
  8. Sabbath'

    Sabbath' Redblock Jesus

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    Whose choice was it to tune on a 40 degree day? Tuner wasn't in Carrum Downs was he?
     
  9. Nefarious78

    Nefarious78 New Member

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    Nah wasnt in carrum downs ;)

    Tuner was gonna wait but decided to tune it as it was gonna be hotter next day.

    How much would this have an affect on tune ? Said probably wouldve got 290 rwkw on a cooler day but i just thought was passing comment.
     
  10. Nefarious78

    Nefarious78 New Member

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    Cool thats a decent change. What cam if you dont mind saying ? Lumpy ? Ive still got stock exhast cat back w/bi modals. You have tri-y or 4 into 1's (1 3/8 or 1 7/8)
     
  11. Tryg

    Tryg Active Member

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    I have a full DiFillipo system from Walkinshaw, no bi-modal anymore. 4into1. I think they're 1 7/8". The cam is fairly mild, was a custom grind...because I want it to take on FI at a later stage. Yes, it has a bit of lope, no stall converter required for the slush box.
     
    Last edited: Aug 12, 2018
  12. 426Cuda

    426Cuda SUBLIME!

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    @Nefarious78 before going to the expense and other drawbacks of a cam upgrade, I'd definitely take it back for a re-tune, or seek another good tuners' opinion. From what you describe, it doesn't sound right.
     
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  13. monty_vfssv

    monty_vfssv Active Member

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    Power seems spot on for an auto.. manuals usually see closer to 300rwkw.

    The lean spike in the graph you talk of, is that when you mash the foot to the floor and it stays lean for a second or two then drops to 12.5?? Mine had the same issue so we made this area very rich and it made no difference so put it back to how it was. As long as you aren't seeing any knock i wouldn't worry about that. Have you got a print out of your graph??

    I wouldn't say theres any drawbacks to a cam upgrade, just have to select the right profile for intended use. And its cheap power really, I spent twice as much on my exhaust and headers.

    Thats awesome power on your car tryg. Picked up gains all the way through. Any pushing with the stock converter at all? The good old "secret" custom cam, works well by the looks of things.
     
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  14. Tryg

    Tryg Active Member

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    I don't think it's a 'top secret' cam, more like I just can't remember all the nomenclature of the custom grind...it's not a catalogue item. They made it to perform without surge and to accept FI in the long run. I didn't want to go the stall converter route and I wasn't too fussed about hitting 500rwhp, which seems to be everyone else's goal when dealing with tuning houses. I wanted, and asked for, real...big...tractable torque! Although it now bogs down a fraction more until 2000rpm, as seen in the graph, it gains everywhere else. For me, its a win. But, as Monty says, the right profile is a subjective and entirely personal experience.
     
  15. dimetime

    dimetime Active Member

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    if its a walkinshaw zorst they are 1 3/4 headers into a 3 inch into a 2.5( they go into a 2.5 for drone)
    as for the OP, i think the original power and performace from factory compared to most aftermarket power packs are generally all in the top end, your power figure seems healthy especially considering you still have the stock catback
     
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  16. 07GTS

    07GTS Well-Known Member

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    there is a fix to that lean spike after entering PE, does your tuner use hpt ?
     
  17. monty_vfssv

    monty_vfssv Active Member

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    Efi live i believe
     
  18. 07GTS

    07GTS Well-Known Member

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    ok im not sure if efi live has the setting or not, i dont think it causes damage its a commanded lean spike just dosnt look good on the graphs
     
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  19. Nefarious78

    Nefarious78 New Member

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    Hi monty_vfssv

    Afr shown below. I have no idea what it should be but most graphs i see are much more balanced in the 13 range.

    20180813_215021-1600x1200.jpg
     
  20. 07GTS

    07GTS Well-Known Member

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    looks to be entering PE very slowly or its tuned different, the dyno power run should be full throttle from the beginning so u should be around 12.5 at the start, u will be lacking some torque staying around stoich under load, the delays and ramp in look slow if thats whats happening
     

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