Power to weight ratio of your car?

[TW]Fox · 7 Jul 2011 at 23:22

jaybee said:
Exactly...what? Is it against the law to throw money at a car to make it go faster than yours?

Foxtrot hasn't spent £5k tuning his Cupra. If he had then I'd not be raising my eyebrows at the power figure.

Fett · 7 Jul 2011 at 23:27

mk1_salami said:
I've heard this argument put forward a few times but it still remains largely a redundant / useless fact. Back in the real world (back roads, cheeky blasts to 120ish,slip roads), or round racetracks, the lower weight, high power car will always be quicker.

I'm not really sure that is the case. The power to weight ratio is just one small part of a huge amount of vehicle and enviromental variables. Unless of course you are comparing identical vehicles bar their weight and power, in which case, ignore. A bhp/tonne list is not a list of fastest to slowest.

Wizardskills · 7 Jul 2011 at 23:33

Z4 coupé - 265/1.390 = 191Bhp/t

Triumph GT6 Mk1 95/0.89 = 106Bhp/t

Not bad for a 43 year old car

Liquidfox · 7 Jul 2011 at 23:40

jaybee said:
Exactly...what? Is it against the law to throw money at a car to make it go faster than yours?

I think he means the obscene amount of money for an extra 75bhp.

Yes it sounded very nice, yes it went like stink, but £4-5K for it, i'm not so sure. He since sold up and bought a 645i

Chris. · 7 Jul 2011 at 23:46

147.45 Bhp/tonne at the moment which isnt great, but I'm 22 with 4NCB so when i get 5 years I'm looking at something a fair bit quicker lol

Gaijin · 7 Jul 2011 at 23:46

ScoobyDoo69 said:
Gaijin.. what bhp and weight are you using?

355bhp and 1400kg - why do you ask?

Its not a competition darling

EDIT/ Are Blobeyes really 1495kg?

turbotoaster · 7 Jul 2011 at 23:47

rx7 twin turbo 400/1 = 400bhp/t

at the end of the year ill be fitting my big turbo and methanol and going up to 700bhp/t

Chris. · 7 Jul 2011 at 23:48

turbotoaster said:
rx7 twin turbo 400/1 = 400bhp/t

at the end of the year ill be fitting my big turbo and methanol and going up to 700bhp/t

Been looking at FD's myself, cant find a decent one though

Princey · 7 Jul 2011 at 23:49

Christopher your sig is too big hun.

400x75px and a max of 20kB.

Gaijin · 7 Jul 2011 at 23:56

You tell him sugar

Scania · 8 Jul 2011 at 06:32

Liquidfox said:
A friend had a 1.8T Audi TT. 295bhp with Dyno print out. Cost him around £4-5K for the work though! Stock internals, stock turbo.

Stock internals, Stock turbo? WTF was the £4-5k? spent on then? :confused:

Flukester · 8 Jul 2011 at 06:44

R420LA6X2/4MNA said:
Stock internals, Stock turbo? WTF was the £4-5k? spent on then?

halfords wiper spoilers... good for 100bhp at the wheel

Mr-White · 8 Jul 2011 at 09:08

Audi A4 2.0tdi 167bhp 1450kg 105bhp/ton

MW

alx · 8 Jul 2011 at 09:15

Ford Ka

69bhp 871kg so 79.1bhp/tonne

Dave M · 8 Jul 2011 at 09:25

R420LA6X2/4MNA said:
Stock internals, Stock turbo? WTF was the £4-5k? spent on then?

I'd hazard a guess, assuming he's right, that the turbo housing is stock but internals changed, intercooler, exhaust, mapping, fuel pump, fpr, injectors (maybe).

He may have done other things like suspension and brakes which are not directly related to power (but a good idea none the less).

NathanE · 8 Jul 2011 at 09:41

-Neil- said:
Custom map, larger injectors, 4-1 manifold, de cat, back box, larger inter cooler and a TRD airbox.

I've also taken quite a bit of weight out of the car, lighter wheels and the whole exhaust system is so much lighter.

Neil.

Exige is about 980kg stock. So minus 5kg per wheel, and minus about 20kg for the 2bular manifold, cat and silencer. That equals 940kg.

271 / 0.94 = 288bhp/tonne ?

Scania · 8 Jul 2011 at 10:05

Telescopi said:
I'd hazard a guess, assuming he's right, that the turbo housing is stock but internals changed, intercooler, exhaust, mapping, fuel pump, fpr, injectors (maybe).

He may have done other things like suspension and brakes which are not directly related to power (but a good idea none the less).

Yes, it depends greatly on what he deems internals....

That kind of figure - just on the engine - struck me as very very high for what seems not that much more power.

Brings back memories of Turbosystems & Sierra Cosworths, the price re power hike seems very low, especially given what similar money did to a Sierrra RSC.

Pete19s · 8 Jul 2011 at 10:55

R420LA6X2/4MNA said:
My trucks figure is fully freighted at its Max Gross weight (44t), just the Cab (Tractor) part weighs just shy of 7.5tons. - 58BHP/ton ish I think?

Thus, it'll still beat NathWraith's VW Polo 1.2 @50BHP....! - Fancy a race upto my speed limiter (55mph) mate?

In therory,I think the Scania would win???

Reminds me of when my brother had his Punto. Got totally owned by a truck from a standing start, I had not laughed so much for a long time.

NathWraith · 8 Jul 2011 at 11:00

R420LA6X2/4MNA said:
My trucks figure is fully freighted at its Max Gross weight (44t), just the Cab (Tractor) part weighs just shy of 7.5tons. - 58BHP/ton ish I think?

Thus, it'll still beat NathWraith's VW Polo 1.2 @50BHP....! - Fancy a race upto my speed limiter (55mph) mate?

In therory,I think the Scania would win???

Probably would be a close one

The Polo is a truely slow car.

Mucky_Pup · 8 Jul 2011 at 11:04

R420LA6X2/4MNA said:
Stock internals, Stock turbo? WTF was the £4-5k? spent on then?

Hairdressing supplies to weigh it down more to get more grip on the dyno