Back working bhp from 1/4 times.
Turbo Mini Forums

Allo all. Im trying to backwork my bhp now ive taken off my weber and im back on a mechanical fuel pump.


15.4 @ 90mph measured using a vbox racelogic thing on an abandoned air strip.

The mini is 650kg without my lardy arse in it. Probably 740ish with me in it.

Its a 1293 with a 296sp and a 3.77 diff if thats any help.

Thanks

Sam.

There are so many variables Sam un less you have full traction off the line (we don't) it's not really possible to work out with any accuracy.

Best 1/4 mile 13.2 seconds @116 mph
First 5 port miniturbo to make over 200 bhp on a carb?
First 5 port miniturbo to make over 200 bhp on Injection?

http://www.mattwoodsphotography.com

you may find this flight of fancy interesting sam .


http://www.turbominis.co.uk/forums/index.php?p=vt&tid=140029

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

i have compared the last 1/8th mile of various cars to get an idea of power/weight :)

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

Trap speed and vehicle weight are the important bits...assuming a sensible run with no cocked up gear changes.


ET doesnt really figure in HP calculators...or at least it shouldnt. Trap speed's do generally be fairly consistent for a given power level though ( unless gearing is particularly bad )

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

Second,,,,what Stevie said trap speed and weight

WEST

Got A GTM With A Honda In the Back, and huge Nitrous bottle where the passenger seat should be when racing!

Thanks fellas. Robert i think your graph is a little optimistic.

never diss the graph master!

That graph is nearly spot on with my speed Vs power....even with a 3 sec 6ft!

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www.fusionfabs.co.uk



1/4mile in 13.2sec @ 111 terminal on 15psi

On 13th May, 2009 James_H said:
never diss the graph master!

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Sorry im being dopie i forgot your working with 750kg as your weight.

It did a 14.6 with a terminal of 96 mph at Santa pod. With 118bhp so a power to weight ratio of roughtly 180bhp per tonne.

So take the power to weight and divide it by the terminal time gave me 1.88541666666666.

So

power = ((terminal / 1.88541666666666) / 1000) x weight)

For a 100mph terminal time I’ve put in a 8 percent correction. To take into account of air resistance.

Power = ((terminal / (1.88541666666666 x 1.08)) / 1000) x weight).

So for my car to run 100mph terminal it would need 132bhp. If you look at other fwd cars running that time it’s about 14 seconds over the 1/4. With a power to weight ratio of 203bhp/tonne. I worked out 203.625. So not too far off the mark.

Dont forget to include your weight

Ah true. fuck it. crash course diet then.