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dynos/operators are all not the same

Discussion in 'Dyno Figures' started by hurricane ss, Mar 1, 2010.

  1. hurricane ss

    hurricane ss New Member

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    i have noticed some figures for bolt-on cars are a bit high(happy dynos) ie tie-down techniques and intake temps that are more than ambient temps which all do play a massive part in the dyno result.Which i was told by my tuner in which he doesnt even use the intake temp probe at all and straps down the car in the correct manner which is set out in the shoot-out mode if any of these procedures are not correctly done the power figure will be higher than it really is.ie bolt-on cars 250rwkw yeah right run it down the 1/4 and see what mph you run ,with that sort of power should be running about 113-115mph not the usual 105-106mph(210rwkw).my car "only" made 265rwkw cam/tune etc so you tell me why would these so called bolt-on cars make 250rwkw.The straps on my car were backed off(1 click) and the power suddenly jumped to 279rwkw which looks good on paper but is not CORRECT AND TRUE.The dyno should only be used for tuning cars.Cheers hope i havent upset any-one but thats my opinion thats all thankyou
     
  2. Turd Ferguson

    Turd Ferguson Donating Member

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  3. greenfoam

    greenfoam New Member

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    20 rwkw between figures at those power levels is nothing and quite normal between dynos. Who's going to fight over 20 rwkw on the peak, it's nothing and wont show up much at the track even if there is that much difference. LS1's want good heads to make good power anyway, a cam alone wont do much for them
     
  4. levymetal

    levymetal TURN MY HEADPHONES UP

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    what's this? different dynos show different power figures? you don't say :p

    the difference between mainline and dyno dynamics is crazy. but yeah, the track is the only place to truly gauge how fast a car is
     
  5. gts071

    gts071 New Member

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    Prior to me having fitted a cam my car was bolt ons and tune where I had received these readings:
    245.0 rwkw
    270.4 rwkw
    290.x rwkw

    With the same setup and tune!
    After having the cam fitted I have not re-visited the above dynos but it goes to show these are really just a tuning tool.

    But in saying that same dyno and same day (as long as the operator doesn't fudge the correction figures) it will be a fair reading of all cars as to who has the most power but is may not be an accurate reading... if you know what I mean but all cars should read either hi or low.
     
  6. Timmos

    Timmos New Member

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    That's a huge difference in dynos... I've heard of being a few kw out of place, but never that much..

    Assuming they could always be that out of wack, i'd hate to dyno my car after doing a big performance mod, have it show a totally incorrect number and think it produces LESS power than what it started with..
     
  7. Darren_L

    Darren_L Well-Known Member

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    dyno figures are a good guide, and the power curve is often more informative than the peak figure. But it's a guide only.

    The only time really you could consider comparing one cars figures to another is when they are put on the same dyno on the same day eg a dyno day. As previously mentioned, whether the dyno reads low or high on the day, all the cars tested in that session will be using the same settings (given no foul play from the dyno operator)

    Having said that, I've had my car on 4 different dynos. All readings were within 10rwhp of each other. But strangely always hear people complaining at the dyno days that the dyno is reading too low.... But yeah I've seen some seemingly incredible readings from cars with minimal mods, that aren't consistant with the readings from same cars with similar mods. Shootout mode was originally intended to eliminate the variables, but it's still subject to changes to intake air temps etc by the opeator which can vary the figure.
     
  8. pimpmyvt

    pimpmyvt New Member

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    soooo...

    i have a vt v6 that i bought 1 year ago and it has 4.11 diff, shortly after i had it i put it on the dyno at independent motorsport in morwell vic just to check that it was running fine, i had a read out at 157hp in third and 156 in fourth, witch seems about right for a vt v6, but i keep blowing off v8's no worrys,(not to blow my own horn, i have been out legged by 4x4 diesal turbs lol)(oh and a discovery 3 v8 damn there fast)... any way soo my figure could be higher or lower do ya reckon?? its all stock part from 4.11 diff

    (and yes its my dailey driver, and im in the country and i get on avridge 13-17 ltrs to 100k's soo i dont recomend it 4 everyday use, oh and has a tendancy to blow up tailshafts when ya doing 180k@5500rpm lol)yes i know im ranting now but its my bday happy 20th to me lol
     
  9. Not_An_Abba_Fan

    Not_An_Abba_Fan Exhaust Guru

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    Does it need to be said?

    Horsepower wins arguments, torque wins races.....
     
  10. immortality

    immortality Moderator Staff Member

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    LOL

    i though it was horse power wins sales, torque wins races :D
     
  11. BradSV8

    BradSV8 Nitrous Junkie

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    Um not quite true a cam is much much better bang for buck than heads on an LS1 or any later series of LS engines..
     
  12. lildavo

    lildavo Member

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    iv had my 5L dynoed runned only made a 121.9rwk which was about right for a stock 5l with only a exhaust system added. guy i go use dynometers and seems to be pretty close.
     
  13. Ian Johnston

    Ian Johnston Active Member

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    Just to bring an old thread back to life, had my XR6Turbo ute checked, and then flash tuned, and only picked up 20rwkw, but 65rwkw
    in the mid range. It has mods, and had been tuned, but not since I have had it, so thats why I had it done.
    Completely different "animal" to drive now:blah blah:

    Now, just had daughters 355 Clubby done, and difference between Mainline, and Dynamics dyno was 28rwkw. I like tuned for mid range power, not top end,
    so figures dont worry me that much. Too old to bragg:rofl2:
     
  14. VxSs2nv

    VxSs2nv New Member

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    I had my Vx ss dynoed at Charlestone performance it said 189.3rwkw and that was cat back exhaust and two hole mod intake. Just a power run. Then took it to a family friend Tean Kustoms it said 165rwkw and he maf tuned it and it says now 189.7. Thats 24.7rwkw gain. After i left went back to steve at charlestone and it said there 198.2rwkw. Huge difference wat to believe i dnt know. The car has ran a 13.7 at wsid
     

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