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Author: Subject: Power to weight (laden)
stressy

posted on 2/9/04 at 12:06 PM Reply With Quote
Power to weight (laden)

I couldnt find a previous topic so lets give it a go.

What are peoples power to weight ratios for on the road condition, i.e. estimated power at flywheel (bhp) divided by laden weight (metric ton i.e 1000kg). By laden weight i mean car plus driver plus full tank of fuel.

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sebastiaan

posted on 2/9/04 at 02:34 PM Reply With Quote
i'm a bit pathetic....

72bhp in a 580kg car without driver, so that would be 72/0.66=109bhp/ton.

Who's got a slower se7en? ;-)

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nick205

posted on 2/9/04 at 03:43 PM Reply With Quote
Is that with a 1.6 Pinto?

Assuming 105bhp for a standard (rebuilt) 20. Pinto and a similar weight to yours then 105/.66 = 159 bhp/ton

What have other people got?






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cornishrob

posted on 2/9/04 at 05:14 PM Reply With Quote
my aim is to have a tweeked cosworth engine so 260 ish horsepower
and the bare minimal in the car so with driver 500kg estimates

which would be 520 hp per ton






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stephen_gusterson

posted on 2/9/04 at 10:29 PM Reply With Quote
my tank derivative should be approx 800 kilos with driver, 130hp.

buty thats still a reasonable 162 bhp tonne!

If I get 7 secs to 60 I will be pleased.


atb

steve






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spunky

posted on 2/9/04 at 11:04 PM Reply With Quote
OK I'll go...

car=540, me=82, full tank=23
so 135/.645=209bhp/tonne

John





The reckless man may not live as long......
But the cautious man does not live at all.....

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Graceland

posted on 5/9/04 at 12:09 PM Reply With Quote
i'll have a go toooo

estimated car weight - 600k, my weight - 75k, fuel weight - 25k - so thats 700k

150/0.7 = 214bhp/tonne if i use the V6 engine from the XR4x4

if i use my newly aquired V8 which i hope to gain 200bhp from on a high comp SD1 EFI engine with a few played with items then i'll get this.

200/0.7 = 285bhp/tonne - which is very close to my 300bhp/tonne figure i desire - god i'm gonna kill myself hehehe


and all that torque aswell - georgeus

[Edited on 5-9-04 by Graceland]






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mackie

posted on 7/9/04 at 08:01 AM Reply With Quote
We should have something resembling what you have graceland
All that on 195/60R14 tyres too
Conrod was saying he can spin his rear wheels in 3rd gear in the dry with his boggo 2l pinto.
I think I'd better get some nappies

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kingr

posted on 7/9/04 at 12:08 PM Reply With Quote
Well, here's mine :

435-460Kgs approx (depending on fuel tank filling).
Me 70Kgs.
Power 160 BHP

giving me (with minimum fuel) 160/.505 = 316 BHP/ton

Kingr

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DarrenW

posted on 10/9/04 at 02:54 PM Reply With Quote
Power to weight Laden - sounds like the name of a new kind of tarmac terrorist! Quite appropriate me thinks!

Its Friday - im bored, nearly time to go home!!






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phelpsa

posted on 10/9/04 at 05:28 PM Reply With Quote
Do you think that 450kg is a pretty good guess for a bike engined standard locost with IRS but without all the road legal bits (lights etc.)??

Say 450kg + 70kg for driver = 520kg

130/0.52 = 250bhp per tonne, thats enough for me.






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marc n

posted on 10/9/04 at 11:22 PM Reply With Quote
i think the 400 - 450 guide for a bike engine car is pretty much the norm, our racecar with full cage wet is 437 kilos based on a fireblade, if you went for billet calipers and alloy uprights and an r1 motor i would expect this to drop below 400 kilos, but probably cost you over a thousand pounds to achieve, besides a fireblade in a 450 kilo car is more than enough to get you into trouble

regards

marc

NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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stephen_gusterson

posted on 10/9/04 at 11:26 PM Reply With Quote
phelpsa.... you are a 70 kilo 13 year old?



atb

steve






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phelpsa

posted on 11/9/04 at 06:18 PM Reply With Quote
I will be by the time it is finished. I am six foot and 62kg now!!

Adam

[Edited on 11/9/04 by phelpsa]






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Hugh Jarce

posted on 13/9/04 at 06:54 AM Reply With Quote
quote:
Originally posted by phelpsa
I am six foot and 62kg now!!

Adam

[Edited on 11/9/04 by phelpsa]

I just cut a six foot length off a ball of tarred twine and it weighs nearly as much as you!





The pay isn't very good , but the work's hard.

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