Subject	Actually:
Posted by	therinL on June 30, 2003 at 9:03 AM
	This message has been viewed 32 times.
In Reply To	well... posted by degradated on June 30, 2003 at 01:57 AM
Message	Removing that rotating mass wont decrease spool time. What your actually noticing is that the car, since lighter, has less inertia and therefore responds more rapidly to transients. So the car willa ccelerate a bit faster which means it will wrap up quicker, ie youll hit boost sooner. So your turbo is not actually spooling any earlier based on RPM. But it is definitely documented that decreasing rotating mass makes a huge difference. Take a look at the kinematics equations... Later Josh
Follow Ups	Do lighter wheels make a noticeable difference in accel? - Bobby12many 23:57:41 06/29/03 A good friend of mine once told me...he has a civc.. - Red ZX (SoCal) 00:09:22 06/30/03 thats funny... - the3z 00:16:41 06/30/03 Big diff... - Spiff187( Calgary,AB ) 00:25:41 06/30/03 Turbo or Sport compact did a dyno test and found that - teambushido 00:28:00 06/30/03 bigger wheels actually do make you lose hp? - RaBBiZ 07:16:17 06/30/03 Ok, I could be way off here, but.. - D.E.S.A.T.S. 00:34:14 06/30/03 Well, centrifugal forces dont really exist :) - Bobby12many 00:38:37 06/30/03 lol.... sounds good to me! (n/m) - D.E.S.A.T.S. 00:39:58 06/30/03 Centrifugal force DOES exist, just stated incorrectly - therinL 09:13:24 06/30/03 Well, if it matters..I think I have something related... - Don-94FD 09:53:26 06/30/03 maybe more rolling momentum = more torque? (n/m) - Bobby12many 12:45:24 06/30/03 Thats what I was thinking maybe (n/m) - Don-94FD 22:52:39 06/30/03 I know a guy around here with the same exact car as me...... - creamofthecrop7 00:52:44 06/30/03 Odds are the wheels are heavier than stock and... - Bobby12many 01:01:58 06/30/03 well... - degradated 01:57:56 06/30/03 Thanks for the reply :) - Bobby12many 02:06:02 06/30/03 A rule of thumb from a race book - Blipman (Australia) 03:03:45 06/30/03 THanks a ton. good info. (n/m) - Bobby12many 03:08:31 06/30/03 Actually: - therinL 09:03:45 06/30/03 I realize that :) - degradated 21:57:15 06/30/03 If you talk to serious (or nutty) bike riders, - dlinn 04:26:57 06/30/03 it does hold for cars, but not as strongly - ZEngineer 04:35:56 06/30/03 Bikes gain not by small HP, most push more per liter - RT 09:25:33 06/30/03 My last car was an '01 Audi S4 - the stock wheels weigh in - Paul_ 07:11:45 06/30/03 Dont know much about S4.. - Sh0wty 09:07:03 06/30/03 LOL... - Paul_ 09:40:47 06/30/03 my tt runs slower times with the stock wheels - stepn2ya 07:50:29 06/30/03 traction maybe,? lighter wheels are better (n/m) - RT 09:23:27 06/30/03 Any hot rodder will tel you the best way to improve - RT 09:22:43 06/30/03 I had two friends who had an Integra Type R and a Prelude SH - boileralum 10:38:53 06/30/03 1lb Unsprung weight (wheels) = 4-5 lbs curb weight (n/m) - 90PearlYellowTT 12:03:38 06/30/03 Yes, I went from 28lbs per 18" rim to 17lbs per 18" rim - 1BADTTZ 15:20:00 06/30/03 It makes a HUGE difference. I went from stock to 18">>> - georgeu2000 22:15:24 06/30/03
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