[T3] Wheel weight affecting whp?

[Toby Erkson <air_cooled_nut@pobox.com>]

<x-flowed>In another VW forum I'm in a guy said he lost some whp (wheel 
horsepower) when he installed larger brakes on his [race] car -- this 
included a larger rim/tire as well I believe.  I don't agree with this 
but he said his dyno proved it.  Now, I don't know if there was anything 
else done to the car prior to the 'after' dyno.  Anyway, is it true that 
changing the rotational mass on the wheels will affect whp?  I can 
understand acceleration changes but, like a flywheel, its weight 
shouldn't affect the hp/torque...right?  If I'm wrong please edumicate 
me :-)  If I'm right, what could be some plausible reasons why his whp 
dropped?

--
 Toby Erkson  --  http://www.icbm.org/
 '72 VW Squareback Darksider, 5-speed, 2.0L, rag top
 '72 VW Squareback Lightsider, automatic, FI, sunroof, gas heater
 '95 VW Jetta ~ SCCA Solo 2 EP #3; '73 Porsche 914; '81 Honda Gold Wing
 Portland, Oregon

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