et difference between............?

casrak7 · 05-11-2012, 03:31 AM

steel wheels (15x8 rear, 15x7 fronts), and Draglite style wheels, (15x8 rear and 15x4 fronts). Is .05 reasonable to expect from that loss in rotating mass?

casrak7 · 05-11-2012, 03:36 AM

Im sorry....Im sure alot of this depends on the current et of the car in question......Currently low 11's at close to 118. 3150 w driver and the steel wheels. 350 chevy w cast crank and junk PM rods, 10-1 compression, 251/258@.050 solid flat tappet, .582/.560 on a 105lsa. Older mildly warmed up brodix -8 heads, holley strip dominator intake manifold, junk 1 5/8 headers with a couple smashed tubes, 4 feet of 3" pipe with 2 chamber mufflers, 820 cfm holley, 4.88 gears, 28x10.5 m/t slicks, 5300 8" tci converter, 36 degrees locked, shifts at 7000, crosses at 7100.

rallye bob · 05-11-2012, 06:10 AM

Quote:

Originally Posted by casrak7

Is .05 reasonable to expect from that loss in rotating mass?

I'm going to say, yes....

GTX JOHN · 05-11-2012, 06:55 AM

Easy...... Car will be about 25 - 30 lighter as well as rotating improvement.

tj310 · 05-11-2012, 08:48 AM

I use a rule of thumb of 2 to 1 for rolling mass vs stationary in drag racing . Racing where you have to start and stop is more sensitive to changes in rolling mass . I predict some one will tell you it's 10 to 1 and your car will go so fast you'll have to add a chute. ---Trevor

05-11-2012, 03:31 AM	#1
casrak7 Junior Member Join Date: Jul 2011 Posts: 63 Likes: 0 Liked 3 Times in 2 Posts	et difference between............? steel wheels (15x8 rear, 15x7 fronts), and Draglite style wheels, (15x8 rear and 15x4 fronts). Is .05 reasonable to expect from that loss in rotating mass? Last edited by casrak7; 05-11-2012 at 03:38 AM.

05-11-2012, 03:36 AM	#2
casrak7 Junior Member Join Date: Jul 2011 Posts: 63 Likes: 0 Liked 3 Times in 2 Posts	Re: et difference between............? Im sorry....Im sure alot of this depends on the current et of the car in question......Currently low 11's at close to 118. 3150 w driver and the steel wheels. 350 chevy w cast crank and junk PM rods, 10-1 compression, 251/258@.050 solid flat tappet, .582/.560 on a 105lsa. Older mildly warmed up brodix -8 heads, holley strip dominator intake manifold, junk 1 5/8 headers with a couple smashed tubes, 4 feet of 3" pipe with 2 chamber mufflers, 820 cfm holley, 4.88 gears, 28x10.5 m/t slicks, 5300 8" tci converter, 36 degrees locked, shifts at 7000, crosses at 7100. Last edited by casrak7; 05-11-2012 at 03:42 AM.

05-11-2012, 06:55 AM	#4
GTX JOHN VIP Member Join Date: Jun 2009 Location: Boulder City, Nevada 89005 Posts: 2,725 Likes: 2,775 Liked 2,445 Times in 690 Posts	Re: et difference between............? Easy...... Car will be about 25 - 30 lighter as well as rotating improvement.

05-11-2012, 08:48 AM	#5
tj310 Member Join Date: Sep 2009 Location: Dresden On. Canada Posts: 460 Likes: 0 Liked 0 Times in 0 Posts	Re: et difference between............? I use a rule of thumb of 2 to 1 for rolling mass vs stationary in drag racing . Racing where you have to start and stop is more sensitive to changes in rolling mass . I predict some one will tell you it's 10 to 1 and your car will go so fast you'll have to add a chute. ---Trevor