1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Rolling road

Discussion in 'General Chat' started by woking rob, Jan 15, 2012.

  1. woking rob

    woking rob Member

    Joined:
    Jan 8, 2012
    Messages:
    111
    Likes Received:
    1
    Just a couple of questions about them

    First off how do they work out flywheel power from wheel power?

    And does it matter wot gear your in when testing for power? (as obviously lower gear ratio will b easier to put out the power)

    Thank u rob
     
  2. Advert Guest Advertisement


  3. sportstractor

    sportstractor Chugger

    Joined:
    Nov 25, 2009
    Messages:
    2,709
    Likes Received:
    34
    From what iv been told when at rolling road days, they calculate your transmission losses when they do the coast down part after, and this arrives at a flywheel figure. I'm fairly sure they usually do it in whatever gear is 1:1, usually 4th on a 5 speed, not sure about a 6 speed
     
  4. woking rob

    woking rob Member

    Joined:
    Jan 8, 2012
    Messages:
    111
    Likes Received:
    1
    Cool thank you
     
  5. superkarl

    superkarl MAN OF STEEL

    Joined:
    Mar 28, 2010
    Messages:
    9,213
    Likes Received:
    2,251
    depends what dyno it is as to how its calculated.
     
  6. jojo

    jojo Looking for Boost!
    Staff Member Moderator Team Daytona quattro Audi S3 Audi A6 Audi Avant Owner Group

    Joined:
    Sep 4, 2003
    Messages:
    28,760
    Likes Received:
    3,429
    Depending on car and the type of power it has, I think you will find cars with more power will use a higher/longer gear for the RR. So the rollers can get a more accurate readout of power delivery, than a quick run in the lower gears.
     

Share This Page