|
|
04-19-2008, 06:38 PM | #67 | |
Brigadier General
127
Rep 4,144
Posts |
Quote:
__________________
2017 F80 YMB.
|
|
Appreciate
0
|
04-19-2008, 10:29 PM | #68 |
Captain
36
Rep 625
Posts |
For a racing wheel you can't beat the SSR Competition (C-RS). They are light and strong (semi-solid forged). The 18" x 9.5"s weigh just 19.6 lbs according to tire rack:
http://www.tirerack.com/wheels/Wheel...All&sort=Brand I have had these for my E36 M3 track car for 4 years and they've been great. I think on the E90/92 M3 you can run 9.5" all around (35 mm offset). What do you think Enigma?
__________________
Driving sideways: It's not faster, but damn it's more fun!
|
Appreciate
0
|
04-19-2008, 10:34 PM | #69 |
Brigadier General
127
Rep 4,144
Posts |
I always liked the SSRs and the Comps are the best. But I have heard that they are not that strong, that you wouldn't want them if you drive where the roads are bad. I almost bought a set for the Miata until I read all of this talk. Comments?
__________________
2017 F80 YMB.
|
Appreciate
0
|
04-19-2008, 10:44 PM | #70 |
Major General
382
Rep 8,033
Posts |
I've been keeping an eye on these on tirerack. What tires would you suggest putting on them for track use?
__________________
|
Appreciate
0
|
04-20-2008, 01:21 AM | #71 | |
Captain
36
Rep 625
Posts |
Quote:
In terms of the strength of the rims, I have driven the SSRs to and from the track for 4 years and they have held up even with race suspension. They probably are not quite as strong as the stock rims since they are so light, but I have not had a problem.
__________________
Driving sideways: It's not faster, but damn it's more fun!
|
|
Appreciate
0
|
04-20-2008, 07:44 AM | #72 | |
Major General
382
Rep 8,033
Posts |
Quote:
__________________
|
|
Appreciate
0
|
04-20-2008, 11:00 AM | #73 |
Brigadier General
127
Rep 4,144
Posts |
e36jakeo,
Thanks for the input about the SSRs. I've read that they aren't strong but then no real episodes of them breaking so I'll place this idea in the category or urban myth. Now, if I can remember how to work Photoshop maybe I can come up with a picture of them on the M3. Oh wait, tirerack already does this. I'll be back. Edit: I'm back. They look good on dark colored cars. Only available in 18" and fairly cheap. Unfortunately, tirerack only has a picture of the 335 sedan, not the M3. And they don't have the Jerez Black color for it either. But it does give you an idea how it looks.
__________________
2017 F80 YMB.
|
Appreciate
0
|
04-20-2008, 11:38 AM | #74 |
Dr. Octagon
265
Rep 1,919
Posts |
I think the consensus is that there is not much to be gained over the stock forged. For an OEM wheel, the 19's are aesthetically pleasing and fairly lightweight.
...Although, consideration of a wheel swap may take center stage (becoming necessary for clearance) pending the final fitment test of the Brembo BBK on the car next week-ish.
__________________
OC ///M
2013 E92 M3 Individual Sold: 2011 E92 M3 SSII | Sold: 2008 E92 M3 SSII | Into a Wall: 2008 E92 M3 SSII | Sold: 2007 E92 335i JB |
Appreciate
0
|
04-20-2008, 11:47 AM | #75 |
Brigadier General
127
Rep 4,144
Posts |
OC kid,
I'm thinking people will replace wheels purely on aesthetics. When you get the BBK let us know how they are wrt the original brakes. Thanks. And don't forget the pics.
__________________
2017 F80 YMB.
|
Appreciate
0
|
04-20-2008, 12:22 PM | #76 |
Major General
382
Rep 8,033
Posts |
I am yet to see a set of aftermarket wheels that look better on the car than the stock 19" wheels. They really look great in person. If you haven't seen one up close, they're worth checking out.
__________________
|
Appreciate
0
|
04-20-2008, 12:26 PM | #77 |
Major General
382
Rep 8,033
Posts |
The 18" SSRs would save about 25lbs over the stock 19" wheels (taking the 18" vs. 19" tire weights into account). That's considerable, provided one can live with the fact that they would be more likely to be damaged than stock...
__________________
Last edited by lucid; 04-20-2008 at 01:47 PM.. |
Appreciate
0
|
04-20-2008, 12:58 PM | #78 | |
Brigadier General
127
Rep 4,144
Posts |
Quote:
Some of the Z4 M owners have replaced the stock wheels with CSL wheels (and also the Continentals with PS2s). It is reported to have made a world of difference in response and drivability. It's worth it.
__________________
2017 F80 YMB.
|
|
Appreciate
0
|
04-20-2008, 01:29 PM | #79 |
Major General
382
Rep 8,033
Posts |
Yes, I am not getting into moment of inertia issue on this thread, but generally speaking for a thin-walled cylinder like mass distribution, I increases with the square of the distance between the wall and the rotation axis. Clearly, unsprung weight would be reduced as well, but I don't know that the effects can be simplied to a linear relationship as that would be a function of the inputs.
__________________
|
Appreciate
0
|
04-20-2008, 01:43 PM | #80 |
Brigadier General
127
Rep 4,144
Posts |
I'm sure the relationship was just a rule of thumb. The idea is that decreasing rotational and unsprung mass is worth more than decreasing weight elsewhere. With the possible exception of driver's weight.
__________________
2017 F80 YMB.
|
Appreciate
0
|
04-20-2008, 01:49 PM | #81 |
Major General
382
Rep 8,033
Posts |
I updated the original post of the thread with a bunch of info on Ericsson CF parts. They are way to expensive, so I wouldn't really consider them, but their advertisements were helpful in that they state weights of stock parts for things like the trunk lid and the external door panels. 33.6 lbs to be saved with CF exterior door panels for $10k (stock ones are steel)! If someone crashes into you, you are hosed though as insurance won't pay for CF door panels. Check it out.
http://www.m3post.com/forums/showthread.php?t=135122
__________________
|
Appreciate
0
|
04-20-2008, 02:22 PM | #82 |
Major General
608
Rep 5,446
Posts |
I think I recall seeing 1# rotational is worth 4# of unsprung. but if its both rotational and unsprung as a wheel is its worth 10# of static wieght.
also for handling its best to remove weight from the top of the car ( 11# CF probably equal to 46# savings in an exhaust) and its worth more in handling to remove it from the ends of the car than the middle (moment of inertia of the car ie turn in).
__________________
Fore Sale Rare 6 speed manual X3 3.oi silver over grey. PM me
|
Appreciate
0
|
04-21-2008, 11:11 AM | #83 | |
Major General
382
Rep 8,033
Posts |
Quote:
http://bmwfans.info/original/E92/Cou...6/ill-26_0239/
__________________
|
|
Appreciate
0
|
04-21-2008, 11:30 AM | #84 | |
Major General
382
Rep 8,033
Posts |
Quote:
Front Disc assembly: 18.784 kg Front Caliper assembly: 13.193 kg (That's 70 lbs per wheel for the fronts!) Rear Disc assembly: 19.102 kg (this is clearly a mistake as they used the same weight for the rear discs as the front discs. I suspect the correct number would be more like ~14lbs) Rear Caliper assembly: 9.963 kg http://bmwfans.info/original/E92/Cou...2007/06/mg-34/ As Swamp was saying you need more thermal mass to balance the lack of massive air flow, but the caliper assembly is probably fair game. It will be costly though. Let's see what Brembo comes up with.
__________________
|
|
Appreciate
0
|
04-21-2008, 02:59 PM | #85 | |
Captain
13
Rep 689
Posts |
Quote:
My new wheels are a 32mm offset.
__________________
Manual gearboxes, the rotary dial of cars.
|
|
Appreciate
0
|
05-06-2008, 10:54 PM | #86 |
Dr. Octagon
265
Rep 1,919
Posts |
lucid:
I'll have the weights for you on the trunk and BBK this week. I'm picking up my OEM brake assembly from Brembo probably Thursday, schedule permitting, and will update you to keep this informative thread going...
__________________
OC ///M
2013 E92 M3 Individual Sold: 2011 E92 M3 SSII | Sold: 2008 E92 M3 SSII | Into a Wall: 2008 E92 M3 SSII | Sold: 2007 E92 335i JB |
Appreciate
0
|
05-07-2008, 05:25 PM | #87 | |
Major General
382
Rep 8,033
Posts |
Quote:
I just removed and weighed the trunk floor cover. It looks like it is secured, but it actually comes off when you pick it up. I bet BMW wanted to give the option of removing it easily. The thing weighs 3.75 kg (8.26 lbs)! Original post updated. I also removed the lining from the trunk lid. Took me 3 minutes to get the plastic rivets out. That weighs about 2lbs, but I don't have a precise measurement yet.
__________________
Last edited by lucid; 05-13-2008 at 07:51 PM.. |
|
Appreciate
0
|
05-08-2008, 02:47 AM | #88 |
Captain
43
Rep 644
Posts |
A street M3 isn't that light...... I nice target for weight loss is the ALMS race M3 at 2530lbs.... There has to be quite a bit of CF in that machine!!
__________________
Brian
2008 E92 M3, MR, DCT, extended BB leather, loaded! 1988 Porsche 928S4, Guards red/Champagne leather 1989 Porsche 928S4 track beast!!! |
Appreciate
0
|
Post Reply |
Bookmarks |
|
|