At The Fly Or At The Wheels

[tokai]

whats the kw difference between power at the fly or at the wheels .. its like .. 50kw difference? but in which favour?

cheers

Johno

[julion]

whats the kw difference between power at the fly or at the wheels .. its like .. 50kw difference? but in which favour?

cheers

Johno

theres more power at the fly then at the wheels. power is lost due to a whole bunch of things, like friction. i'm sure someone will give you a better answer, but theres my 2 cents.

[mad082]

it takes power to turn the gearbox, diff, etc.

on a stock car a very rough conversion is flywheel kw = rear wheel horsepower.

your average drivetrain takes out about 30-40kw.

[Big Rizza]

You can also have the halfway point and measure power at the hubs, which eliminates power loss through tyre heat/friction, but still has transmission/drivetrain losses, just to complicate things further...

[Freddy Kruger]

it takes power to turn the gearbox, diff, etc.

on a stock car a very rough conversion is flywheel kw = rear wheel horsepower.

your average drivetrain takes out about 30-40kw.

yeah bout 30-40kw is lost from the flywheel to the rear treads.

[tokai]

sweeeeeet thanks guys

picking up my new beast hopefully tommorow and wanna put it in for a good service and tuning soon as possible

cheers!

[MBS206]

It's not a "30-40 KW is lost"

Other wise a car that only pushes say 60KW stock at the fly, would only be 20-30 at the wheels, BUT this isn't so.

What it actually is, is approximately 30% loss in a RWD for an auto

About 25% loss for a RWD in manual

And around 20% is the general give for a FWD car of either manual or auto.

[ronnydotk]

check this out

click!

fairly technical article about drivetrain loss

[Munna1]

http://nissanskyline.6te.net/conversions.htm

[ctjet]

there is a way to figure it out more accurately by using a mathimatical equation... similar to what Munna1 posted

you just times or divide by your figre by 1.35 depending on whether you want to figure out HP or KW