Whats your bhp per Tonne and bhp per Litre

[drifty325i 0]

idea stolen from somewhere else but it makes more relevance here

my E30 is 340bhp and 1240kg's so that makes mine .Hp is at the flywheel

1. Rileys V8 e30----271.1 bhp per Tonne and 85bhp per Litre

2. Mr e34 stock----M30 131bhp per Tonne and 61bhp per litre

3. Apex Astra----188.32 per tonne and 120.5BHP per litre

4. Simon's V8 E34 about----172bhp per tonne and 72bhp per litre

5. Gus's turbo 318is----212hp per tonne and 143bhp per litre

6. CamB 2002ti----125-130bhp per tonne 62-65bhp per litre

7. BradC 850csi----200bhp per tonne 380hp and 76bhp per litre

8. Morerevsm3 e36----269 bhp per tonne and 113bhp per litre

Edited January 17, 2008 by Drifty 340i V8

[Apex 693]

Jeepers, 340bhp that’s 75bhp more than stock, well done.

Im not sure what the Touring weighs but it feels like it has 75bhp per tone

Astra= 120.5BHP per litre 188.32 per tonne

Edited January 16, 2008 by Apex

[Old_Skool_Bmw 0]

idea stolen from somewhere else but it makes more relevance here

my E30 is 340bhp and 1240kg's so that makes mine .Hp is at the flywheel

1. Rileys V8 e30 is 271.1 bhp per Tonne and 85bhp per Litre

2.

3.

4.

I'm hoping for around 105 - 115hp/litre on the e30 M3 when it's dyno'd in 2 weeks. Not too sure of weight/power ratio.. haven't had the car weighed yet. I'll get actual figures up once it's all dyno'd.

Laurence.

[Guest Simon*]

idea stolen from somewhere else but it makes more relevance here

my E30 is 340bhp and 1240kg's so that makes mine .Hp is at the flywheel

1. Rileys V8 e30 is 271.1 bhp per Tonne and 85bhp per Litre

2.

3.

4. Simon's V8 E34 is about 172bhp per tonne and 72bhp per litre

That's why I've put mine at the bottom of the list

Car weighs about 1660kg and has 286bhp (on a cold day)

How's your traction Riley?

[mr E34 11]

How do you work out flywheel HP? My car had 136.1 kw @ 5400rpm, dynapack hub dyno.

+ 320nm @ 4160rpm.

From memory, i think Gavin said the HUB dyno would read approx 8-10kw higher than ROLLER dyno with tyres.

Edited January 17, 2008 by mr E34

[drifty325i 0]

Traction is not as bad as i thought it would be, i have some fairly grippy tires and decent rear end setup shocks/springs lsd etc.

Havint driven it in the wet yet though

[Guest Simon*]

How do you work out flywheel HP? My car had 136.1 kw @ 5400rpm, dynapack hub dyno.

Boris I've gone with the factory quoted 286 hp for mine - like yours was 210/218 (can't remember which) off the production line - although now that you've had it tweaked it might possibly be a bit more?

[Guest Simon*]

Traction is not as bad as i thought it would be, i have some fairly grippy tires and decent rear end setup shocks/springs lsd etc.

Havint driven it in the wet yet though

Sticking all that power down was always going to to be the hard part!

Nice work - hope it plays nice for you

[mr E34 11]

Boris I've gone with the factory quoted 286 hp for mine - like yours was 210/218 (can't remember which) off the production line - although now that you've had it tweaked it might possibly be a bit more?

Thanks Simon, don't forget those are supposed figures for NEW engines. Some probably +%, some -%.

[mr E34 11]

idea stolen from somewhere else but it makes more relevance here

my E30 is 340bhp and 1240kg's so that makes mine .Hp is at the flywheel

1. Rileys V8 e30 is 271.1 bhp per Tonne and 85bhp per Litre

2.

3.

4.

50:Completely stock M30 with no AFM tune: 131bhp per tonne/ 61 bhp per ltr. ( i guessed 210 flywheel??? & 1600kg)

[Guest Simon*]

Thanks Simon, don't forget those are supposed figures for NEW engines. Some probably +%, some -%.

Yeah I know

I expect a few horses have escaped along the way

But if Riley reckons he's got exactly 340bhp out of his BMoyota then 286 is good enough for me

Eh Riley?

Edited January 16, 2008 by Simon*

[Neal 513]

My e36 325i 192hp ,1240 kg ,77 hp per ltr , 155 hp per tonne (or are these e36's 1340 kgs can't remember)

Wifes e328i 193hp ,1240 kg ? 68 hp per ltr 155 hp per tonne

My 1330 cc turbo mini club car 660kg ( probably lighter )133.5hp @ 15 lbs 100 hp per ltr 197 hp per tonne

Second mini 1000cc 660cg 38hp 50 hp per ltr 50 hp per tonne

My Ducati 750 , 200 kg 130 hp, 130 hp per ltr 650 hp per tonne or 400 hp per tonne with rider

[mr E34 11]

I have put this link up before but some people may have missed it, very interesting dyno figures for a wide range of BMW engines.

Don't get a fright when you see how LOW some can be on older engines.People say HP is bragging rights, sells cars.

http://www.alpinaaustralia.com.au/dyno/dyno_main.htm

Edited January 17, 2008 by mr E34

[CamB 48]

I'll share - about 1000kg (actual weight - nearly out of gas), and I guess 130hp max - the original rated power (102hp at the wheels at Velocity, so probably 125hp), thats:

- 125-130hp/tonne

- 62-65hp/litre.

But I'm happy, coz I did a couple of 1:17s at Puke last weekend

[Andrew 30]

Gus/my old - Turbo 318iS

230 rwhp as measured by Gavins dyno - 25% power train loss roughly so call it 258 flywheel hp.

So 143hp/ltr <- god bless turbos

212hp/ton

Edit: it weighed 1220 kg

[Andrew 30]

Just watched the video of the V8 riley - the turbo is a wee bit slower than that, that must be BADASS

[mr E34 11]

Gus/my old - Turbo 318iS

230 rwhp as measured by Gavins dyno - 25% power train loss roughly so call it 258 flywheel hp.

So 143hp/ltr <- god bless turbos

212hp/ton

Edit: it weighed 1220 kg

Forced induction is bloody good when you see those figures.

I still don't get pwr train loss, say you are developing 200hp @ wheels, you then turbo and you get 300hp @ wheels.

200hp + 25% =250 flywheel

300hp + 25% =375 flywheel

375-250=125, yet my increase was only 100hp, the higher the hp the 25% should be scaled?? I don't know, am i missing something in the equation??Thanks. ALSO, some say 15% loss on manual cars?? Don't know.

Edited January 17, 2008 by mr E34

[drifty325i 0]

Just watched the video of the V8 riley - the turbo is a wee bit slower than that, that must be BADASS

Haha year its bpretty badass, still has more in it to, ill have to get someone to film it,so i can drive better

[bradc 0]

I'm about 200bhp/tonne, assuming 380hp and 1900kg

68bhp per litre

[Andrew 30]

Forced induction is bloody good when you see those figures.

I still don't get pwr train loss, say you are developing 200hp @ wheels, you then turbo and you get 300hp @ wheels.

200hp + 25% =250 flywheel

300hp + 25% =375 flywheel

375-250=125, yet my increase was only 100hp, the higher the hp the 25% should be scaled?? I don't know, am i missing something in the equation??Thanks. ALSO, some say 15% loss on manual cars?? Don't know.

To be fair 25% is a complete guess! Its just what a few dyno operators reckon. No I don't think 25% would scale - that is the nature of percentages.

Your equation makes sense - look at it this way. The car gained 100hp at the wheels but required 125 flywheel hp to show that gain (i.e some was lost in the drivetrain). Not sure if it is accurate in terms of real losses but the math is correct.

[Andrew 30]

I'm about 200bhp/tonne, assuming 380hp and 1900kg

68bhp per litre

Is it really that heavy?! you have to get it weighed.

[Apex 693]

I always as a rough guess just convert wheel KW to BHP to get a rough flywheel figure. Different cars loose different amounts though

I mean my car would put out say 65-70kw at the wheels, so 67is 90hp. So 90 odd KW at the fly. No?

Edited January 17, 2008 by Apex

[mr E34 11]

I always as a rough guess just convert wheel KW to BHP to get a rough flywheel figure. Different cars loose different amounts though

I mean my car would put out say 65-70kw at the wheels, so 67is 90hp. So 90 odd KW at the fly. No?

Dyno figures for your car here. http://www.alpinaaustralia.com.au/dyno/dyn...0i_Manual_2.htm

[CamB 48]

Depends on the weather, the dyno, the transmission, tyre pressures, blah blah blah.

Basically who knows - that's why I put a range, and even then it might be optimistic.

[Apex 693]

Dyno figures for your car here. http://www.alpinaaustralia.com.au/dyno/dyn...0i_Manual_2.htm

I wish