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Transmission power loss ?

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Old 12-20-2010, 01:17 PM
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Default Transmission power loss ?
Hey guys,

What sort of percenatge in power is lost through the F20 and its OEM drivetrain.

I have the figures at the wheels but am curious at what they are at the fly wheel.

221bhp
143ft/lb of torque

This isn't for science just out of interest really.

Cheers .
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Old 12-20-2010, 01:20 PM
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An efficient RWD tranny like the BMW could be as low as 11% on a 6MT.
15% is often punched in on the Dyno Dynamics tests I have seen for S2000.
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Old 12-20-2010, 01:49 PM
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Typically 18%, on the dyno i use 18% IIRC on my S.

Depends on the dyno type (load, internia etc), tyres, day, correction factor i could go on and on.

221BHP @ Wheel is pretty high IMHO.
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Old 12-20-2010, 02:22 PM
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Originally Posted by Irvatron,Dec 20 2010, 02:49 PM
221BHP @ Wheel is pretty high IMHO.
This is my graph from the MASE visit on Friday.

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Old 12-20-2010, 02:47 PM
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Sorry to burst your bubble Suits, but 221.7 at the wheels would be around 260 flywheel. Unless your S is turbocharged for a 10 year old car that's not going to happen, it only left Japan with 238 horses max.

The graph you've got is more likley at the flywheel, see my M56 cars chart below



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Old 12-20-2010, 02:49 PM
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Originally Posted by richmc,Dec 21 2010, 12:47 AM
it only left Japan with 238 horses max.
Unless it was a JDM spec
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Old 12-20-2010, 02:53 PM
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Originally Posted by Ultra_Nexus,Dec 20 2010, 03:49 PM
Unless it was a JDM spec
Even so that would be 247 horses flywheel around 202 at the wheels, and like I said 10 years later and how many miles?
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Old 12-20-2010, 03:00 PM
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It's a JDM with 61'000 miles a AEM EMS, Mugen Filter, Ricks Racing Header, decat and a Mugen exhaust.

Mapped by MASE.

Don't worry, you won't burst my bubble.
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Old 12-20-2010, 03:06 PM
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Originally Posted by Suits,Dec 20 2010, 04:00 PM
It's a JDM with 61'000 miles a AEM EMS, Mugen Filter, Ricks Racing Header, decat and a Mugen exhaust.

Mapped by MASE.

Don't worry, you won't burst my bubble.
So not bog standard then?
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Old 12-20-2010, 03:12 PM
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Originally Posted by richmc,Dec 20 2010, 04:06 PM
So not bog standard then?
No, I never said it was.

It had nothing to do with my question.

Your right though, I worked it out at about 255 at the flywheel.
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