Buschur Racing dyno testing brake rotors?
Jul 10, 2006, 02:29 PM
#32
Originally Posted by davidbuschur
drifto,
My exact point is what you just said. The tires are a huge weight problem. I got light wheels but went to a wider tire and almost lost all the savings I gained.
My exact point is what you just said. The tires are a huge weight problem. I got light wheels but went to a wider tire and almost lost all the savings I gained.
Jul 10, 2006, 02:30 PM
#33
Originally Posted by Drifto
Don't forget to check tire weights as well. Many people don't do this but I think it is more significant than the other stuff due to the tires being the farthest point of rotation. Yokohamas, and Azenis seem to be the heavest I've seen in most sizes. the stock Advan 235/45/17 is 26lbs I believe. Michelins seem to be the lightest that I've found. My 255/35/18 Michelins are 24lbs. Most tire weights can be found on tireracks web page.
1a) Kumho Ecsta V710 245/45-17 (currently using on MR BBS rims) = 25lbs
1b) I also weighed this combo at home (tire+rim) on my home digital scale = 42lbs (pretty good, since the rims are 17.7lbs each)
2) Kumho Ecsta V710 275/40-17 (will use next on 17X9 rims) = 25lbs (same as my current tires, so I lose nothing!)
3) I weighed a 10,000+ mile stock Advan in my garage = 23.6lbs (lots of tread gone, though)
Doesn't look like I will add much, if any weight with the 275s, so if I can reduce weight with my 17X9s, I'll be in great shape.
Jul 10, 2006, 02:35 PM
#34
Evolving Member
iTrader: (5)
Join Date: Jun 2004
Location: VA/KSA
Posts: 256
Likes: 0
Received 0 Likes
on
0 Posts
Would be nice to see the dyno gains (if any) for other rotational weight saving parts, such as a lighter flywheel/clutch combo and a carbon drive shaft.
I also remember a post a while back when DYNOFLASH weighed the Baer brakes and had a couple for sale, he might know the exact weight.
Great find
I also remember a post a while back when DYNOFLASH weighed the Baer brakes and had a couple for sale, he might know the exact weight.
Great find
Jul 10, 2006, 02:41 PM
#35
Originally Posted by Warrtalon
This helps illustrate why the MR BBS rims are so valuable. They weigh 17.74lbs each while the stock Enkeis weigh 20.5 (VIII) and 20.17 (IX), respectively. That's a total of 11.04lbs and 9.72lbs of rotational mass saved. This is why I'm being picky on my purchase of 17X9 rims for racing with 275-width tires. I want a LIGHTER rim than my stock BBS's along with significantly lighter brakes for the reasons Dave has illustrated.
Jul 10, 2006, 02:44 PM
#38
Originally Posted by davidbuschur
I have a set of the BBS wheels here if someone wants to make me an offer. I will have to check what kind of shape they are in. I think they have a set of fairly worn Hoosier's on them now.
Jul 10, 2006, 02:45 PM
#39
Evolving Member
iTrader: (5)
Join Date: Jun 2004
Location: VA/KSA
Posts: 256
Likes: 0
Received 0 Likes
on
0 Posts
I checked my old records (i have a long list of parts and their weight) and found the weight of the front baers to be 15.8 / rears are 11.7, but i am not 100% sure, i got it off the board a while back.
Jul 10, 2006, 02:57 PM
#40
Originally Posted by MR 600
I checked my old records (i have a long list of parts and their weight) and found the weight of the front baers to be 15.8 / rears are 11.7, but i am not 100% sure, i got it off the board a while back.
Dave, I guess there is no need to weigh them if you are getting a set. I hope my scales were correct.
Jul 10, 2006, 04:44 PM
#42
Evolved Member
iTrader: (3)
Join Date: Jan 2005
Location: Somewhere in Oh
Posts: 977
Likes: 0
Received 0 Likes
on
0 Posts
I'm not surprised at all. Someone I knew lost 8 whp because the 18s he put on his RSX weighed a few lbs more than the stockers. The wheels I put on my DSM were one inch larger dia, 1.5" wider, and weighed about 6lbs less each. Friggen stock rims on that car were ~ 22lbs.
Pretty cool test, none-the-less. Nice to see some concrete numbers from a reliable source.
Pretty cool test, none-the-less. Nice to see some concrete numbers from a reliable source.
Last edited by Talon; Jul 10, 2006 at 04:48 PM.
Jul 10, 2006, 06:27 PM
#44
Newbie
Join Date: Nov 2003
Location: Mckinney, Tx
Posts: 97
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by davidbuschur
I find it hard to believe that the Baers are that light, if they are actually that light then I may very well be changing my rotors again.
21 pounds sounds a lot better than 14.9 but it sounds too good to be true. I don't know where you would find that much additional weight without sacrificing something.....
21 pounds sounds a lot better than 14.9 but it sounds too good to be true. I don't know where you would find that much additional weight without sacrificing something.....
Like double cheeseburgers and great Texas buffets. Man, I got about a 1/10 of a second in "fat static mass"
Mike
