hub dyno

hey guys,

my friend just emailed me and said he just got his car dynoed on the hub at 97.5 fwkw. i just wanna know how to convert that figure into a normal dyno like dyno dynamics or something like that. cheers.

if its measured at 97.5fwkw, thats what it should be. the only alteration that should need to be made is if the dyno hasent been tuned in a while, or you are trying to calculate torque.
what is your mates car a vtir teg?

nah civic vtir with cold air + extrators and tune from a vafc..

sounds about right for a vtir teg/civic with those 2 mods.

for instance the b16b type r has 185hp in the engine, how do i convert that into kw at the wheel? cheers

go to google and type:
185 horsepower to kilowatts

remember there is drive train loss, condition of engine and weight of wheels that make a difference.
you will also have massive loss if the car is an auto.

i tried that and that gives me kw in the engine.. ><

i pretty much just wanan know the civic type R b16b engine at the wheel.

sorry for the hassle

i would think about 105-110kw atw tuned, with hd clutch and lightened flywheel.
about 100kw atw with basic IHE.

The general estimation is to multiply by 0.8 for a hub dyno and 0.75 for a rolling road dyno. So 97.5kW is estimated to be about 91.4kW on a dyno dynamics type dyno.

hub produces higher figures as the vehicle doesnt need to spin rollers.

fyi
http://www.autospeed.com.au/cms/article.html?&A=0930

Quote:

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Originally Posted by ACTI0NMAN-1

hub produces higher figures as the vehicle doesnt need to spin rollers.

fyi
http://www.autospeed.com.au/cms/article.html?&A=0930

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Actually, it's because the hub dyno doesn't take into account the weight of your wheels. All dynos measure torque at the rollers/hub, and then calculate the power you make from there. Since the rollers measure the torque after the wheels, it is lower than the hub dyno.