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Horses - Kilowatts 

 

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 Post subject: Horses - Kilowatts
Posted: Wed Feb 28, 2007 7:09 pm 
Oompa Loompa
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Ride: BF XR6T Ute

Location: Kalgoorlie
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Can Anyone tell me an equation to convert Horses at the wheels to:
1. Kilowatts at the flywheel, AND;
2. Kilowatts at the treads
Any help would be cool. CHEERS
Mitch

 

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Posted: Wed Feb 28, 2007 7:17 pm 
Getting Side Ways
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to convert kW to HP, times by 1.341, divide by 1.341 for HP to kW

 

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Posted: Wed Feb 28, 2007 7:53 pm 
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If you want HP-KW then you can Times say 340Hp by 0.746 which equals to 253.64Kw.

So if you want Hp-Kw its Times by 0.746
& if you want Hw-Hp its divid by 0.746

Easy way to remember which way is which is to think if you want a bigger number to smaller number ie Hp-Kw then you TIMES where as if you want a smaller number to a bigger number ie Kw-Hp then you divid.
Its the backwards way to normal way cos its .746 so its not a whole number.

I prob have confussed you but yea thats it

Griffo

 

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Posted: Wed Feb 28, 2007 8:09 pm 
Getting Side Ways
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Or you could look up CONVERTER on the internet, amazing what you can find.
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Posted: Wed Feb 28, 2007 8:13 pm 
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http://www.wentec.com/unipower/calculators/kw_hp.asp

 

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Posted: Wed Feb 28, 2007 8:15 pm 
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bowsaw wrote:
Or you could look up CONVERTER on the internet, amazing what you can find.


YAAAAAHOOOOOOOOO-OOOooo. :P

phong =P~

 

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Posted: Wed Feb 28, 2007 8:23 pm 
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Just type exactly what you need into google, it has a whole heap of converters: like this

I reckon google will be able to provide HJ's soon. :lol:

 

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Posted: Wed Feb 28, 2007 11:03 pm 
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horses at the wheels is very close to kw at the flywheel, thats the quickest, easiest way to get an idea of the figures

ie 450rwhp is damn near 450fwkw

 

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Posted: Thu Mar 01, 2007 12:35 am 
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so with that how would u convert say 310hp at rear wheels to at the motor??

 

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Posted: Thu Mar 01, 2007 12:39 am 
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that would be approx 310kw at engine
or 415hp at engine
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Posted: Thu Mar 01, 2007 5:28 pm 
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Click this is a good one.

 

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Posted: Thu Mar 01, 2007 6:04 pm 
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Worksheet i posted ages back:

http://www.fordmods.com/forums/viewtopi ... lculations

Just remember that its VERY difficult to accurately gauge power loss through the drivetrain and therefore any calculation of engine HP based on rear wheel output will be flawed.

 

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Posted: Thu Mar 01, 2007 6:38 pm 
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Quick and easy way to convert

HP = KW * 4 / 3
KW = HP * 3 / 4
power at rear wheels ~ power at flywheel * 0.7 (very roughly)

so a car with 200HP at the flywheel...
... has 200HP * 3 / 4 = 150kw at the flywheel
... has 200HP * 0.7 = 140HP at the rear wheel
and 140HP at the reat wheels = 140 * 3 / 4 = 105rwkw

 

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Posted: Thu Mar 01, 2007 7:30 pm 
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find a workshop with an engine dyno when blueprinting. break it in on the engine dyno & get results.

install the engine back on the car then take it in for a chassis dyno run. compare the deference & that should give you your loses.

that is the most accurate way to measure wfkw & rwkw.

 

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Posted: Fri Mar 02, 2007 1:05 am 
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http://www.asknumbers.com/PowerConversion.aspx

That will give you torque and everything else you can think of as well... if it can be converted it'll have it. Now, let's see, do they have one for hot lesbians?

 

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