stressy
|
| posted on 2/9/04 at 12:06 PM |
|
|
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.
|
|
|
|
|
sebastiaan
|
| posted on 2/9/04 at 02:34 PM |
|
|
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? ;-)
|
|
|
nick205
|
| posted on 2/9/04 at 03:43 PM |
|
|
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?
|
|
|
cornishrob
|
| posted on 2/9/04 at 05:14 PM |
|
|
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
|
|
|
stephen_gusterson
|
| posted on 2/9/04 at 10:29 PM |
|
|
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
|
|
|
spunky
|
| posted on 2/9/04 at 11:04 PM |
|
|
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.....
|
|
|
Graceland
|
| posted on 5/9/04 at 12:09 PM |
|
|
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]
|
|
|
mackie
|
| posted on 7/9/04 at 08:01 AM |
|
|
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
|
|
|
kingr
|
| posted on 7/9/04 at 12:08 PM |
|
|
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
|
|
|
DarrenW
|
| posted on 10/9/04 at 02:54 PM |
|
|
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!!
|
|
|
phelpsa
|
| posted on 10/9/04 at 05:28 PM |
|
|
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.
|
|
|
marc n
|
| posted on 10/9/04 at 11:22 PM |
|
|
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
|
stephen_gusterson
|
| posted on 10/9/04 at 11:26 PM |
|
|
phelpsa.... you are a 70 kilo 13 year old?
atb
steve
|
|
|
phelpsa
|
| posted on 11/9/04 at 06:18 PM |
|
|
I will be by the time it is finished . I am six foot and 62kg now!!
Adam
[Edited on 11/9/04 by phelpsa]
|
|
|
Hugh Jarce
|
| posted on 13/9/04 at 06:54 AM |
|
|
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.
|
|
|
