Newbusa
Zone Head
Posts: 542
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posted May 30, 2009 05:26 PM
full tank or half full?
So when your dragracing do you run a full tank or half empty and why?
  
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Douglas Home
Zone Head
Posts: 710
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posted May 30, 2009 05:36 PM
Five litres does me a test/n/tune!
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Doug Mackay Australia
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Compton
Zone Head
Posts: 969
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posted May 30, 2009 06:09 PM
around a gallon and half in there. less weight. seems to be enough so you dont have a fuel slosh issue. i just fill up as needed.
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b.w.
zx14, little longer, little louder, little lower.
08 Busa, just a little longer and louder and lower than the 14
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14nooby
Zone Head
Posts: 987
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posted May 31, 2009 04:29 AM
Scratch the full tank. Weight = slow
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Shane661
Needs a life
Posts: 11494
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posted May 31, 2009 04:35 AM
A general thought is that 30-35 lbs. = .10 in ET. Gas is 6 lbs. + per gallon, and the tank holds 5.8 gallons. So, by running only 2 gallons you could improve your ET by over .05 compared to a full tank.
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biggmoinc
Zone Head
Posts: 747
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posted May 31, 2009 07:42 AM
Unless u keep losing by .05, who really cares, if ur bracket racing ur really racing urself anyway
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07 ZX14 bmc filter, muzzy m14, 16/44,66",auto shift, 6'3, 204lbs/1.54/3.99/6.03@120/7.8/9.32@147
biggmo@aol.com
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Douglas Home
Zone Head
Posts: 710
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posted May 31, 2009 07:45 AM
Nothing like a P.B. , Stick em on the fridge!!!
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Doug Mackay Australia
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Shane661
Needs a life
Posts: 11494
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posted May 31, 2009 07:55 AM
 Edited By: Shane661 on 31 May 2009 16:02
quote:
Unless u keep losing by .05, who really cares, if ur bracket racing ur really racing urself anyway
Why not just leave the bike bone stock? I'm pretty excited if I can knock .05 off of my ET. Plus, if you are consistent it is important to know how weight affects ET...then you are not scratching your head about why you are running different ET's.
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BobC
Pro
Posts: 1736
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posted May 31, 2009 09:34 AM
Took a look at the instantaneous mpg gauge on the 2 mile runway at Woodbridge last year, up around max rpm in 6th and it said 9mpg. That means I need around half a gallon for a couple of runs plus fuel for the run back on the return road. Lots of stops in the paddock for a top-up in a days racing.
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Candy Thunder Blue 2006 ZZR1400
Stock wheelbase
Max: 205.4 mph in 1.25 miles
2012 ZZR1400 in Golden Blazed Green
Brock CT Full System. etc
Max: 203.1 in 1 mile (so far)
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Shane661
Needs a life
Posts: 11494
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posted May 31, 2009 09:36 AM
I could never run my 12R that low at the dragstrip...it would starve the pump and kill the engine.
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biggmoinc
Zone Head
Posts: 747
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posted May 31, 2009 12:48 PM
i hear u shane, i got friends wit older gsxrs, they got 1 gal fabricated tanks on them wit lectron carbs. I understand u completely! I remember one time my boy didnt refill his tank n after his burnout he stage first set of lights n it cut off, lol. It was still a time run thank god, lol. He was running 9.0s. After i posted that comment i sat here n thought bout what i would give to run a little faster, lol. I had just filled my tank on the way to the track too. that mightve got me in the teens, lol.
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07 ZX14 bmc filter, muzzy m14, 16/44,66",auto shift, 6'3, 204lbs/1.54/3.99/6.03@120/7.8/9.32@147
biggmo@aol.com
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fury
Expert Class
Posts: 427
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posted May 31, 2009 01:26 PM
1 litre.
Does a run and drops weight...
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Newbusa
Zone Head
Posts: 542
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posted May 31, 2009 05:49 PM
I was not thinking of the weight, but the tendency for weight shift if half full helping to cause wheelies?No?Yes? I agree that weight slows you down but sometimes so do wheelies.
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kawasakijockey
Pro
Posts: 1876
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posted May 31, 2009 06:27 PM
No weight shift at half tank. Look how the tank is designed.
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Get on the shortbus boys 'cause its time to get schooled.
2007 ZX-14
1.38 60ft
9.03 @ 149mph
8.95 @153 small shot n2o
8.68 @160mph 5lbs boost
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Newbusa
Zone Head
Posts: 542
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posted June 01, 2009 05:16 PM
Okay,Will have to try it with a half a gallon or so and see how she runs.I have never run near empty at the strip.
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Shane661
Needs a life
Posts: 11494
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posted June 01, 2009 05:20 PM
Half a gallon and you might plant your teeth on the triple clamp. That's how hard my 12R cut out and back in, from starving the pump...
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