Kw - Hp - Ps

[geno8r]

Hi

Just wondering what "PS" is as a power rating?

1 Kilowatt is 1.34 Horsepower, but i see PS too as a power rating?

*Also what is a "2500rpm stall ?????? device, i forget the name of it, what do they do? There was one on that red 8 Sec WRX stationwagon but it was at like 4500rpm.

Cheers,

[Bass Junky]

PS is "French Horsepower"

1kw = 1.359621617

Stall Converter or "High Stall"

[Laurence]

CV (cheval-vapeur) is french horspower dude

PS = Pferdestärke (Horse Strength German) which is Metric Horsepower(probably where you got the French bit from). Sometimes referred to as Power Stroke.

1 PS = 0.735kW

1 hp = 0.746kW

[cul202]

Yeah ps is almost exactly equal to bhp. A page of conversions can be found here:

http://www.citroen.co.uk/conversion/c_conv...converter_rates

Stall/torque converters are the fluid couplings that autos use in place of a clutch. Basically, its an internally finned, fluid filled housing attached to the engine with a fan-like impeller attached to the gearbox shaft inside it. As the finned housing turns the movement of the fluid turns the gearbox fan & inturn moves the car.

Changing the design/size/angle of the blades in the converter changes it's 'hook up' (rpm range where the car begins to move significantly) properties. The idea of a 4500 stally is to delay the hook up till later in the rpm range (circa 4500rpm, but not necessarily right on it) where the engine is making plenty of power. Great for allowing big laggy turbs to spool up but not so practical for heading down to the shops due to you engine having to do 4000-5000rpm constantly to keep the car moving.

Ballpark figure for a std stally would be around 1200-1800 car dependant...

[geno8r]

Cheers, exactly what i wanted to know...

That Conversion page is good but im still guessing on one thing. My dyno read i had 1100 Lb of Torque, I'm guessing this would be Lb-ft? Converted to Nm its like 811. Thats sounds too high for my 218 rwkw car.

Lb-f to Newtons was 247. I read that big v8s have like 400 - 500 Nm, it just sounds a bit crazy that my 2.5 L on 12psi has more Torque *with 811* than those big fat v8s. Have i converted this right? If not how how do i know my Nm. Thanks,

[nmcmahon83]

you have to multiply it by the distance away from the load object... whatever that is... might be the radius of your wheels, but that sounds too low. I've never understood how torque applies to cars... I think its how many apples it can move a metre or something lol...

I'm digressing... basically, the 800Nm is too high, there is a distance in there, hopefully someone else can tell u what that is.

[crack]

try here

[geno8r]

Hmmm ok well my Dyno sheet is here.....

http://www.skylinesaustralia.com/forums/sh...ead.php?t=50725

Maybe someone will understand the Torque rating on the Right hand side...

[Rudager]

Torque on a dyno means shit, unless it's an engine dyno

The gear your in, diff ratios, rims size amount of rubber, tailshaft length all kinds of stuff

Killowatts/HP/PS is the mesure of energy being produced basically how much chemical potential energy (the air/fuel mix) is being turned into kinetic energy, which in turn gets used to spin the crank etc etc.

Torque is a mesaure of the amount of "twisting" force being applied. Cars have gearboxes and diffs to change the torque output becuase otherwise you would go nowhere fast

It's confusing, they sound like the same thing but there not, and i cant think of a better way to explain it (i'm like that i know what i'm trying to say i just cant do it very well )

[geno8r]

Yeh, thats kool, Rudager.... Guess i just dont know my Torque then... Not important, just wouldnt mind knowing it, oww well...

[dojobi]

Have a look at this thread geno8r. I always work my torque out from the power curve.

http://www.skylinesaustralia.com/forums/sh...ead.php?t=49383