A day at the Dyno

Discussion in 'UK Motorcycles' started by Molly, Mar 14, 2007.

  1. Molly

    Molly Guest

    When I arrived at "Road and Track Dyno", Chris greeted me with a cheery
    hello Molly, fancy a cuppa?". He made a cup of Earl Grey with a touch of
    sugar, " you can spit it out if you like" he said. Actually it was quite
    delicious. Chris put the bike on the dyno and started to tie huge straps to
    it to hold it in place. I couldn't believe how much preparation work he did
    before he fired the bike up. The first few runs got the base line figures
    sorted out and, as Chris expected, it was running lean. He then set about
    producing a new map and fitting a TRE (timing retard eliminator). I toddled
    off for a cup of coffee.



    I had told Chris that I would love to get the mid range beefed up a bit
    since the ultimate HP was really academic.



    When I got back from coffee Chris had already completed the mods and was
    into producing a new map.



    To recollect what I've done to the bike:

    Pair of Micron Race cans

    Power Commander III USB

    K+N Air Filter.



    Chris came out with a look of disbelief on his face, "It's ridiculous" he
    said, "all that power from a road bike" he continued "it would be winning
    GPs not too long ago." "It's ridiculous". He told me that he had found
    useful gains throughout the rev range and some really decent torque and HP
    increases especially around 7,500 to 9,000 rpm.



    Almost four hours later the peak power is up to nearly 165bhp from 160bhp at
    the back wheel and torque up by 3ft-lbs at 81 ft-lbs.



    See the graph:

    http://sportsbike.org/10r/dyno_run.jpg



    So, did it make any difference to the bike? The figures on the graph don't
    get close to telling the full story; it felt like a different bike. No doubt
    the TRE helped a lot in the lower gears because it's now quite a handful and
    want to stick it's front wheel skywards a lot more than it did before. The
    power delivery is very smooth and controlled whereas before it was a little
    fluffy in the lower rev range. Chris spent a lot of time on ironing out the
    lower fuelling and it certainly paid off. He told me I could expect further
    gains as the engine loosens up. It's only done 1,300 miles, so I might be
    back later in the year and look at some airbox mods. It's not so much how
    much power you have but it's the way it's delivered that's important. And
    does it deliver.
     
    Molly, Mar 14, 2007
    #1
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  2. Molly

    Gyp Guest

    Gyp, Mar 14, 2007
    #2
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  3. Molly

    Molly Guest

    And you've got less cylinders as well.
     
    Molly, Mar 14, 2007
    #3
  4. Molly

    David Thomas Guest

    About 160 more than my old Bullet.

    David
     
    David Thomas, Mar 14, 2007
    #4
  5. Molly

    Timo Geusch Guest

    Fewer.
     
    Timo Geusch, Mar 14, 2007
    #5
  6. Molly

    Bryan Guest

    So... does it still have that buzzing feeling at the top of the rev
    range that you wanted to avoid losing ?
     
    Bryan, Mar 14, 2007
    #6
  7. Molly

    Molly Guest

    When I posted it I thought...shit, I wonder if anyone would notice.
     
    Molly, Mar 14, 2007
    #7
  8. Molly

    Molly Guest

    It's even more bonkers.
     
    Molly, Mar 14, 2007
    #8
  9. Molly

    Bryan Guest

    If it helps, I did but I wasn't going to point it out since I'll
    invariably perform at least as egregious an error within 30 minutes.
     
    Bryan, Mar 14, 2007
    #9
  10. Interesting. A mate of mine has an 06 and I have an 05. We both have
    PCIII and TRE's [1] fitted. He has Acropovic cans and I have a LeoVince.
    However mine is still in stealth mode. We should be getting both of them
    on the rolling road in Swindon soon. It should be interesting.

    [1] I know, they where Christmas presents, OK.
     
    eric the brave, Mar 14, 2007
    #10
  11. Molly

    Gyp Guest

    Who has the dyno in Swindon? And do you happen to know if they know
    their way round Mikuni flat-slides [1]


    [1] Proper carb for proper bikes; none of this injection rubbish
     
    Gyp, Mar 14, 2007
    #11
  12. Yes they do. They spent about a day doing my mate Bealie's ZXR750 with
    flatslides. The guy used to race apparently. Drop me an email and I'll
    get the address off to you. I need to ask Bealie where it is. I would
    just follow him to the place when we visit :)
     
    eric the brave, Mar 14, 2007
    #12
  13. Molly

    Mark Guest

    So can I ask what you were charged for 4 hrs of setup time?

    Mark
     
    Mark, Mar 15, 2007
    #13
  14. Molly

    Krusty Guest

    Looking at the torque between 5-7k, I'd say they need to work on their
    strapping down technique.
    I'll stick with my 169bhp guess for when you have that done.
    Absolutely.


    --
    Krusty
    www.MuddyStuff.co.uk
    Off-Road Classifieds

    '02 MV Senna '03 Tiger 955i '96 Tiger '79 Fantic Hiro 250
     
    Krusty, Mar 15, 2007
    #14
  15. Molly

    MikeH Guest

    No - he got them from Les. It's an apostrophe thats missing.
     
    MikeH, Mar 15, 2007
    #15
  16. Molly

    Molly Guest

    Including the TRE it came to £211.00
     
    Molly, Mar 15, 2007
    #16
  17. Molly

    Tosspot Guest

    It's an apostrophe that's missing.
     
    Tosspot, Mar 15, 2007
    #17
  18. Molly

    Tosspot Guest

    Blimey, thats squids well spent imho.
     
    Tosspot, Mar 15, 2007
    #18
  19. Molly

    Ben Guest

    I'm assuming that's not including the cost of the Power Commander and
    the Microns.

    In which case it's a lot of money for 4bhp.
     
    Ben, Mar 15, 2007
    #19
  20. Molly

    CT Guest

    But the torque, man, the torque!
     
    CT, Mar 15, 2007
    #20
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