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      08-21-2013, 06:51 PM   #23
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Quote:
Originally Posted by SriRamJaiRam
Quote:
Originally Posted by dhirm5 View Post
This thread seems to have wandered from the original question - it can't be that hard to get an authoritative answer to this q... Anyone?
I agree... I just had my BMW sales rep at Crevier check w/ his parts dept. & he's indicating that the the 343 wheel is 2lbs. lighter than the 601 wheel. Seems crazy that a comp package wheel would be heavier.... Thoughts anyone?
That's interesting. It's close enough that I would think the 601M wheel is probably forged. However it also means the 343M is a superior wheel.
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      08-21-2013, 10:02 PM   #24
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Quote:
Originally Posted by stealth.pilot View Post
Regarding the down pipes, hard to say because I haven't seen a car with them. A couple of the guys in our local chapter have them now so I can answer in 2 weeks time. My main hesitations would be (I) warranty, (II) noisy rattle sound from Wastegate, and (iii) cel error.

Muffler delete is probably a good idea. Car is too quiet as is. Best to do muffler delete plus straight pipes.

On the carbon brakes - I like them. The discs are an inch bigger. I haven't measured if that means more braking power but it might be. Need to check the numbers. They are also quieter and cleaner. Squealing is an issue with the standard brakes - some threads on this here. That said, we don't have issues wth brake fade on the streets, so value is not as big as it would be for a track user. In Texas on the f1 track CCB were clearly better, but I don't know if the steel brakes were brand new like the CCBs. Rotor condition and pads come into consideration too. FYI I didn't buy CCB.
Stealth,

Was wondering how many people are experiencing the squeal with the stock brake and were able to fix it through a bed in or if that's even reccomended? I started getting a squeal when coming to a stop, lightly pressing on the brakes. Took it to my dealer and they fixed it or so they said by cleaning the rotors and pads. They further told me the process they used took the brakes back to show room condition and for me to take it easy for the first 200 miles. That was at 2800 miles.. I just hit 3800 miles this week and the squeal is back. Dealer told me this time nothing they can do. Brakes are safe, within all tolerances and are a performance brake that are known to squeal.
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      08-22-2013, 12:19 AM   #25
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Originally Posted by Rich65 View Post
Stealth,

Was wondering how many people are experiencing the squeal with the stock brake and were able to fix it through a bed in or if that's even reccomended? I started getting a squeal when coming to a stop, lightly pressing on the brakes. Took it to my dealer and they fixed it or so they said by cleaning the rotors and pads. They further told me the process they used took the brakes back to show room condition and for me to take it easy for the first 200 miles. That was at 2800 miles.. I just hit 3800 miles this week and the squeal is back. Dealer told me this time nothing they can do. Brakes are safe, within all tolerances and are a performance brake that are known to squeal.
I think my brakes squeal when they are dirty. I usually find I can get rid of it with some hard braking from high speeds, e.g. braking from 130mph to 50mph. Then it comes back later and I have to go do some robust driving again.

Ceramic brake pads would help a lot. I remember my parent's Lexus GS460 had a brake squeal issue. Took it to the dealer, and they replaced it with quiet brakepads which were ceramic pads. Solved the problem permanently.

Issue with the M5 is not many people make ceramic pads, and also I think they may slightly reduce braking power.
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      08-22-2013, 08:02 AM   #26
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[QUOTE=stealth.pilot]
Quote:
Originally Posted by SriRamJaiRam
Quote:
Originally Posted by dhirm5 View Post
This thread seems to have wandered from the original question - it can't be that hard to get an authoritative answer to this q... Anyone?
I agree... I just had my BMW sales rep at Crevier check w/ his parts dept. & he's indicating that the the 343 wheel is 2lbs. lighter than the 601 wheel. Seems crazy that a comp package wheel would be heavier.... Thoughts anyone?
Isn't the 601 wheel 0.5 inches wider? I'm quite ignorant about wheels, but could that be the reason?
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      08-22-2013, 07:57 PM   #27
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Quote:
Originally Posted by stealth.pilot View Post
That's interesting. It's close enough that I would think the 601M wheel is probably forged. However it also means the 343M is a superior wheel.

So my sales rep at Crevier BMW has told me that the following:

The 343M Forged wheel is 11.2 Kg for the front wheel and 11.7Kg for the rear.

The 601M Light Alloy wheel is 13.78Kg for the front and 13.9Kg for the rear

So that's a 5.5lbs difference per wheel. Seems like a lot...
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      08-22-2013, 08:07 PM   #28
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I like the ceramic brakes not only for their superior performance at the limits, but more importantly, for the 42 pound unsprung weight savings they provide. That's a huge difference. Couple that with some BBS FIs and you've got over 60 pounds unsprung weight savings.....that'll make the car feel lighter on its feet.

If i order an LCI, I'm springing for the CCB.
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      08-22-2013, 08:41 PM   #29
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Quote:
Originally Posted by SriRamJaiRam View Post
So my sales rep at Crevier BMW has told me that the following:

The 343M Forged wheel is 11.2 Kg for the front wheel and 11.7Kg for the rear.

The 601M Light Alloy wheel is 13.78Kg for the front and 13.9Kg for the rear

So that's a 5.5lbs difference per wheel. Seems like a lot...
Yes that would suggest to me that the 601M wheel is not forged. The rear wheel is 0.5" wider the front is the same width. However 5.5lbs seems like a lot especially given the slimmer spoke design of the 601M wheel.
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      08-23-2013, 12:46 AM   #30
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Quote:
Originally Posted by stealth.pilot View Post
Yes that would suggest to me that the 601M wheel is not forged. The rear wheel is 0.5" wider the front is the same width. However 5.5lbs seems like a lot especially given the slimmer spoke design of the 601M wheel.
Aren't the 343's and 601's listed as the same specs with regard to width?

I remember reading somewhere that ZCP wheels being 0.5" wider.
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      08-26-2013, 11:43 AM   #31
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Quote:
Originally Posted by stealth.pilot View Post
Yes that would suggest to me that the 601M wheel is not forged. The rear wheel is 0.5" wider the front is the same width. However 5.5lbs seems like a lot especially given the slimmer spoke design of the 601M wheel.

So here is the response that I received from BMW:

Thank you for contacting BMW of North America, LLC.

We appreciate your patience while we researched your request. We are unable to provide a specific weight for these wheels, but we can advise that the 20" 601-M wheel is a casted wheel and the 343-M wheel is a forged wheel and the lighter of the two. We hope this information is helpful.

The BMW Customer Relations and Services Department is available Monday through Friday from 9:00 a.m. to 9:00 p.m., ET. You can reach us at 1-800-831-1117.

Sincerely,

Emily Dunn
Customer Relations and Services
Representative
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      08-26-2013, 11:58 AM   #32
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Quote:
Originally Posted by SriRamJaiRam View Post
So here is the response that I received from BMW:

Thank you for contacting BMW of North America, LLC.

We appreciate your patience while we researched your request. We are unable to provide a specific weight for these wheels, but we can advise that the 20" 601-M wheel is a casted wheel and the 343-M wheel is a forged wheel and the lighter of the two. We hope this information is helpful.

The BMW Customer Relations and Services Department is available Monday through Friday from 9:00 a.m. to 9:00 p.m., ET. You can reach us at 1-800-831-1117.

Sincerely,

Emily Dunn
Customer Relations and Services
Representative
Awesome. Well done. 343M > 601M wheel then. I wouldn't touch the 601M wheel with a bargepole. 20" cast wheel on an M5 is absurd. You would have to go in for wheel balancing every 8 weeks.
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      08-26-2013, 12:00 PM   #33
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I cannot believe they went with a heavier cast wheel on the "competition package". Doesn't make any sense at all.
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      08-26-2013, 12:05 PM   #34
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disappointing
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      08-26-2013, 12:12 PM   #35
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bmw needs to make even $ by cutting corners
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      08-26-2013, 12:14 PM   #36
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Sure is weird that the 601's aren't forged.

Anyone know if the 433M wheels from the M6 GC are forged?
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      08-26-2013, 12:14 PM   #37
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Quote:
Originally Posted by stealth.pilot
Quote:
Originally Posted by SriRamJaiRam View Post
So here is the response that I received from BMW:

Thank you for contacting BMW of North America, LLC.

We appreciate your patience while we researched your request. We are unable to provide a specific weight for these wheels, but we can advise that the 20" 601-M wheel is a casted wheel and the 343-M wheel is a forged wheel and the lighter of the two. We hope this information is helpful.

The BMW Customer Relations and Services Department is available Monday through Friday from 9:00 a.m. to 9:00 p.m., ET. You can reach us at 1-800-831-1117.

Sincerely,

Emily Dunn
Customer Relations and Services
Representative
Awesome. Well done. 343M > 601M wheel then. I wouldn't touch the 601M wheel with a bargepole. 20" cast wheel on an M5 is absurd. You would have to go in for wheel balancing every 8 weeks.
Are the widths the same 601 vs. 343?
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      08-26-2013, 02:05 PM   #38
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Quote:
Originally Posted by SriRamJaiRam View Post
Are the widths the same 601 vs. 343?
No. The 601M on the M5 are 1/2" wider front and back - 9-1/2" and 10-1/2" vs the 343M 9" and 10" widths.
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      08-26-2013, 03:36 PM   #39
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Quote:
Originally Posted by bobblehead
bmw needs to make even $ by cutting corners
This is why I think the CP is a cynical marketing package rather than a real performance upgrade.

Like I said in my review of the CP car the differences are almost trivial, and now we learn that they are using a cast wheel. How is this package supposed to have credibility when we learn this?

I mean at a minimum they could have put wider tires on it. What use is a wider softer heavier wheel with the same tires?

BMW thinks we are a bunch of chumps.
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      08-26-2013, 04:15 PM   #40
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Quote:
Originally Posted by remmib
Sure is weird that the 601's aren't forged.

Anyone know if the 433M wheels from the M6 GC are forged?
433M are cast. There's another thread on this somewhere.
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      08-28-2013, 06:48 PM   #41
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Totally bogus. More horsepower to move heavier wheels...kinda cancels itself out.
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      08-29-2013, 01:41 AM   #42
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Quote:
Originally Posted by Hunter5179
Totally bogus. More horsepower to move heavier wheels...kinda cancels itself out.
I know, makes no sense. Too bad.....
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      08-30-2013, 05:11 PM   #43
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Quote:
Originally Posted by stealth.pilot View Post
This is why I think the CP is a cynical marketing package rather than a real performance upgrade.

Like I said in my review of the CP car the differences are almost trivial, and now we learn that they are using a cast wheel. How is this package supposed to have credibility when we learn this?

I mean at a minimum they could have put wider tires on it. What use is a wider softer heavier wheel with the same tires?

BMW thinks we are a bunch of chumps.

So this is the most recent reply from BMW about wheel widths:

Thank you for contacting BMW of North America, LLC.

We have researched your inquiry and can confirm that the width of the 343-M wheel and 601-M wheel is the same. We hope this information is helpful.

The BMW Customer Relations and Services Department is available Monday through Friday from 9:00 a.m. to 9:00 p.m., ET. You can reach us at 1-800-831-1117.

Sincerely,

Emily Dunn
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Representative
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      08-30-2013, 05:14 PM   #44
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Quote:
Originally Posted by stealth.pilot View Post
Awesome. Well done. 343M > 601M wheel then. I wouldn't touch the 601M wheel with a bargepole. 20" cast wheel on an M5 is absurd. You would have to go in for wheel balancing every 8 weeks.
couldn't agree more
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