Subject	That won't be an efficiency loss though.
Posted by	Marshall on September 11, 2002 at 8:52 PM
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In Reply To	He didn't talk about losses from rotating wheels posted by MikeH(Twin GT35BB Incon Z) on September 11, 2002 at 03:44 PM
Message	Setting a mass into motion is not an energy loss, it is energy storage. Friction is a loss- it turns kinetic energy into heat. But spinning up a flywheel or heavy wheels is simply putting some energy into storage and the result on the dyno would be seen as a delay in the power curve, with the effect diminishing as the RPM's rise. It will decrease the *rate* at which the engine spins up, but it will neither decrease the amount of torque your engine puts out nor limit its rpms, the onset of power will just be delayed. By the time you're at max RPM's, the effect will be barely noticeable on a dyno. I contend that the article is flawed.
Follow Ups	Interesting link on dyno numbers and accuracy. - MikeH(Twin GT35BB Incon Z) 14:46:32 09/11/02 Another site about Correction factors and turbo cars - MikeH(Twin GT35BB Incon Z) 14:54:55 09/11/02 very good article (n/m) - Red Z Boy 4 15:02:37 09/11/02 Interesting read. (n/m) - Spongerider (Soon) 15:04:50 09/11/02 For you Colorado guys who think I am full of it - MikeH(Twin GT35BB Incon Z) 15:06:49 09/11/02 I don't think you're 'full of it', but you single out...>>> - 5150Z 15:40:27 09/11/02 There is very little correction at sea level to - MikeH(Twin GT35BB Incon Z) 15:47:41 09/11/02 Do you know anyone else on this forum who dynoed - MikeH(Twin GT35BB Incon Z) 15:53:26 09/11/02 Adam Alter (Altered BeaZst) got over 380rwhp with - Chip(GinnMotorsports) 20:34:39 09/11/02 You don't have to have intercoolers to use higher psi. - Woody75 (Denver) 21:07:29 09/11/02 Pure Evil... - Woody75 (Denver) 07:00:41 09/12/02 I got 350rwhp too with full cats. I said 370rwhp - MikeH(Twin GT35BB Incon Z) 13:18:03 09/12/02 :sigh: do you think 3 posts on this is enough? (n/m) - Halo Z 15:15:09 09/11/02 That's why there is a track! ;-) (n/m) - Some Dude 15:23:27 09/11/02 I question the accuracy of a few points - Marshall 15:36:28 09/11/02 He didn't talk about losses from rotating wheels - MikeH(Twin GT35BB Incon Z) 15:44:43 09/11/02 That won't be an efficiency loss though. - Marshall 20:52:30 09/11/02 Nissan is known to overrate engines, look at the Q45 - Chip(GinnMotorsports) 20:32:10 09/11/02 I think the Lexus's HP is simply under rated. - Marshall 21:03:59 09/11/02 Have you dyno'd a Q? What is the historical basis for >> - Mike (Austin) 11:20:53 09/12/02 I think it was the Maxima and Altima that had HP #'s revised - Marshall 12:41:56 09/12/02 '02 Maxima and Sentra Spec-V were each rolled back >> - Mike (Austin) 11:19:05 09/13/02 I agree the Lexus GS400 dynos aroun 230rwhp stock - MikeH(Twin GT35BB Incon Z) 13:21:42 09/12/02 Rephrase "Nissan is known to overrate their engines compared - Chip(GinnMotorsports) 15:51:34 09/12/02 Actually, different magazines had vastly different >> - Mike (Austin) 11:34:36 09/13/02
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