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 dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on October 4th, 2005 at 07:30 PM |
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Chassis Dyno/Weight/Mph comparisons
I am interested to know who has chassis dynoed their car
and then taken it to the drags and got a MPH.
It is going to take some people to guess their weight I guess.
My car weighed 830kg and ran 114.77mph and with that combo,
had 177hp@6200 at the wheels, corrected for temp of 22 degrees C.
(no other corection data used on this dyno).
More fuel system tuning improved that to 188hp@6700.What will it run?
[ Edited on 4-10-2005 by dangerous ]
| Quote: | Originally
posted by westi
That's mad Alan.
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speedster356
A.k.a.: Peter Mcleod
Custom Title Time!
Plastic not Classic Racing
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| posted on October 4th, 2005 at 08:44 PM |
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Latest dyno run was 238HP @ rw/6200 rpm and the following Wednesday a best of 11.6 @ 125 MPH.
780 kg race weight, that's 1/2 fuel and me @ 69 kgs.
The drag coefficent of the Spyder is quite low as compared to a beetle, somewhere between 0.290 and 0.310
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Spyder-WISD 07-09-05 11.6s @ 125 MPH
Speedster-WISD Nats 05 14.4s @ 89 MPH
Jet cruiser-Coogee 22-09-05 900 deg C @ 110,000 rpm
Weaseling out of things is what separates us from the animals....................Except the Weasel.
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jvl054
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| posted on October 4th, 2005 at 09:02 PM |
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| Quote: | Originally
posted by speedster356
Latest dyno run was 238HP @ rw/6200 rpm and the following Wednesday a best of 11.6 @ 125 MPH.
780 kg race weight, that's 1/2 fuel and me @ 69 kgs.
The drag coefficent of the Spyder is quite low as compared to a beetle, somewhere between 0.290 and 0.310
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Hi Speedster! thats impressive, keep up the good work...JVLRacing:thumb
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bat69
Insano Dub Head
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| posted on October 4th, 2005 at 09:34 PM |
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Pete that thing of yours is a dead set weapon. I was just watching the DVD of your car doing the Hillclimb at Bulahdelah smoking the tyres on the
straights at 130kph. .... ...........Very Impressive!
White Knuckle Racing Team
"Drive it like dirt"
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on October 5th, 2005 at 08:25 PM |
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Anyone else?
| Quote: | Originally
posted by westi
That's mad Alan.
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on October 17th, 2005 at 06:25 PM |
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Well, I guess the weather has more to do with it than I thought, because the ET was way- better but the MPH was not as good as my best(but close).Half
track was better though.
Although, by the track weather station, the difference between my two best MPH's was about 1500ft of relative altitude.
I will keep plugging away to optimise the combo.
| Quote: | Originally
posted by westi
That's mad Alan.
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on October 29th, 2005 at 04:58 PM |
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Hey Pete, what revs were you shifting at with that 6200rpm peak?
What tyres and transaxle?
| Quote: | Originally
posted by westi
That's mad Alan.
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dangerous
A.k.a.: Dave Butler Muffin Man
23 Windows of Awesome
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| posted on October 29th, 2005 at 05:30 PM |
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From the few examples that I have info for,
you can add around 12% and then us the formula to calculate the speed you will run
at the track.
MPH=234 X cubed root of (HP divided lbs)
So if your car weighed say 1850lbs(841kg)
and you made 143 wheel HP (160 engine)
it equals 103.5 mph ....depending on weather.
Anyone tried this info?
| Quote: | Originally
posted by westi
That's mad Alan.
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on February 26th, 2006 at 07:47 PM |
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Latest run with 188rwhp shows about 215 to 220fwhp with the formula.
This is with 1807lbs and 115.95mph.
| Quote: | Originally
posted by westi
That's mad Alan.
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dangerous
A.k.a.: Dave Butler Muffin Man
23 Windows of Awesome
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| posted on April 11th, 2006 at 06:51 AM |
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This one Herman.
| Quote: | Originally
posted by westi
That's mad Alan.
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Adolph
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| posted on April 11th, 2006 at 08:22 AM |
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Thanx
Hermann
2000cc turbo type 4, dragster (325Kw)
2714cc no turbo, no gas, street bug (140Kw)
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