Your all Torque...

[SteveH]

Could anyone shed any light on the difference between Nm and lb-ft, both quoted as vehicle torque figures? (in a similar manner between PS & BHP or completely different??)

[Nige_RS4]

Isn't it like comparing kgs with lbs? Just two different ways of measuring the same thing!

[Paulm]

Isn't it like comparing kgs with lbs? Just two different ways of measuring the same thing!

Hit the nail on the head there

[harry]

I read this somewhere; -

Torque = force x distance

English units of torque are pound-inches (lb/in) or pound-feet (lb/ft).

the SI unit (international measurement) is the Newton-meter (Nm).

Torque counts contain a distance and force. To calc torque multiply force by distance from the center. A car engine creates torque and uses it to spin the crankshaft. This creates torque by applying force at a distance.

HP = 1.36 kW

torque lb/ft = NM/1.36

1 n m = O.74 ib/ft

[SteveH]

Cheers, was clearly having a senior moment there, obvious really its a metric/imperial m/ft thing

[harry]

To convert from: To: Multiply by:

BHP - PS - 1.01387
BHP - Ft Lbs/second - 550
BHP - Watts - 745.7
PS - Kg M/second - 75
PS - Ft Lbs/second - 542.476
PS - Watts - 735.5
Kilowatts - BHP - 1.341
Kilowatts - PS - 1.360
Lb Ft - Nm - 1.356

[simple1]

So NM shows as being higher figure than lbs............ hence why the car industry is quoting NM?

[harry]

Probably Simon yeh but also that Nm is an international figure not just a british measurement

[simple1]

Next you will have us converting to PS instead of BHP............ Being sort of British, can we not stick to English measures.......... or is that not EU compliant.........

[s4woody]

so when someone torques bullshit is that in nm or lb/ft..

[derdle]

I've got a sad Excel spreadsheet that does the conversions for you. Spose I could post it in the downloads section???

Paul

[harry]

[quote="derdle"]I

Do it

[derdle]

It won't let me!

[harry]

You will probably have to submit via the Crew. PM them.

[toasty]

300lbs/ft is near as damn it 400NM which is the torque of a standard B5 S4 - I always remember that and beacuse the numbers are quite nice it makes other calculations fairly intuitive.