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Thread: How much in your tank per lap?

  1. #1
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    13th April 2004 - 13:57
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    How much in your tank per lap?

    looking for a starting point as to how much fuel per lap people use. gonna start running low tanks. cheers people
    I'm off to the pub, I may be sometime.

  2. #2
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    Quote Originally Posted by scroter View Post
    looking for a starting point as to how much fuel per lap people use. gonna start running low tanks. cheers people
    Assuming we are talking about your SV??.You would be reasonably safe at 400mls a lap at Manfeild

  3. #3
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    11th July 2008 - 21:37
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    my little 150 runs on 98 octane fumes on a kart track, but at taupo i go through about 1.5 tanks of gas!! it
    better be going somewhere good!

    per lap id say id use about 150ml's of gas {i am running a bigger carb}
    chuck norris's calender goes from march 31st to april 2nd

    No one fools chuck norris.......

  4. #4
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    Quote Originally Posted by Billy View Post
    Assuming we are talking about your SV??.You would be reasonably safe at 400mls a lap at Manfeild
    yeah, the SV it is. Thanks billy, just wanted a starting point really. 400mls sounds pretty reasonable to me.
    I'm off to the pub, I may be sometime.

  5. #5
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    I've run out of gas (twice ) It is REALLY a bummer and embarrassing
    Err on the side of caution
    "You never understood that it ain't no good, you shouldn't let other people get your kicks for you" - Bob Dylan

  6. #6
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    Quote Originally Posted by wharfy View Post
    I've run out of gas (twice ) It is REALLY a bummer and embarrassing
    Err on the side of caution
    Yup...,
    We actually budget on 800 mls on the long track, and 500 on the short.....

    Then through a bit more in to account for race stoppages...
    The Team Air Force Racing ZXR400 uses quite a bit sitting in the pits at 3000 RPM....

  7. #7
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    Quote Originally Posted by scroter View Post
    looking for a starting point as to how much fuel per lap people use. gonna start running low tanks. cheers people
    Be carefull cutting it too fine! I heard a lot of stressed out people in the dummy grid wanting ti get more gas after a red flag was show in lap 2 of one of the 600ss races at R3 I think it was...they didn't let them get anymore either for sake of time btw.

  8. #8
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    if you made up a fuel tank dip-stick you can judge fuel consumption yourself

  9. #9
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    325ml per lap + alllow for 4 extra laps of consumption over & above the race length + keep one litre in the tank.

  10. #10
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    Quote Originally Posted by codgyoleracer View Post
    325ml per lap + alllow for 4 extra laps of consumption over & above the race length + keep one litre in the tank.
    For my Pro-Twin Sv I have calculated that the fuel consumption averages out at around 9.5Km per litre (using BP 98). This works out to 105mls per km. So it's really easy to calculate per lap fuel requirements for each circuit by simply using track length in km * 105ml

    Manfield normal = 3.03 * 105ml == 318ml per lap
    long = 4.51 * 105ml == 473ml per lap

    As Glen says, allow for warmup lap and lap at end of race and possible extra couple of laps for a restarted race - and definitely an extra litre so the tank does not get too low to avoid fuel starvation after hard braking.

    The only track I allow a little extra is Pukekohe which has a lot of WFO throttle.

  11. #11
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    30th November 2008 - 09:12
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    Any of you 150 riders that are trying to conserve weight by carring less fuel....beware.... if you run them to low they tend to get starvation on long corners(leant over) and thats when they go BANG as it leans them out. Also tends to do damage if it runs out on the straight.........as its not the running out its the lean period just prior that hurts them.

  12. #12
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    thanks everyone.
    I'm off to the pub, I may be sometime.

  13. #13
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    Quote Originally Posted by quickbuck View Post
    Yup...,
    We actually budget on 800 mls on the long track, and 500 on the short.....

    Then through a bit more in to account for race stoppages...
    The Team Air Force Racing ZXR400 uses quite a bit sitting in the pits at 3000 RPM....
    You measure it?About a half a tank does me a while.

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