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      10-16-2021, 03:47 PM   #1
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(This is my reply in another post but wondered to post separately so that more people will see the info. )

There were several m2/m2c/m2cs/m2csr on summit point main circuit with BMWNCC. We took advantage on the scale for club racing and actually compared the weight difference between m2s. No info on m2 and m2csr.

Big surprise is m2cs is only 80lbs lighter than m2c. Both stock manual and about half tank gas.

3587lbs: DCT M2C
(no stock seats, Half cage, bucket seats, Apex ec-7 wheels, half tank gas)

3563lbs: Manual M2C
(everything stock, half tank gas)

3479lbs: Manual M2CS
(everything stock, half tank gas, no picture)

2845lbs: Manual 135i
(no interior, no stock seats, bucket seats, half cage, half tank gas)
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      10-16-2021, 04:10 PM   #2
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Did the CS have steel or ceramic brakes?
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      10-16-2021, 05:46 PM   #3
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So if you go for some 763m on the comp that will drop a few more pounds. I really think bmw did not put the CS on the diet they shoulda have.
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      10-16-2021, 08:50 PM   #4
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Quote:
Originally Posted by ///M2C View Post
Did the CS have steel or ceramic brakes?
I didn't check but I think it's steel brake. The owner tracks the car pretty often and ceramic brake will cost a lot…
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      10-17-2021, 04:44 AM   #5
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I assume the stock M2C is a slicktop?
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      10-17-2021, 04:46 AM   #6
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I assume the stock M2C is a slicktop?

Also, it's highly likely the CS was standard 2NH brakes like the M2C as only 134 CS' were optioned with 2NK CCBs (for US market).
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      10-17-2021, 10:43 AM   #7
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Here is my stock M2C, manual, no sunroof, 788, executive package, full tank of gas.

3559lbs


I only compared the F31 awd wagon on the same scales, and it was heavy, but still very well balanced.
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      10-17-2021, 02:12 PM   #8
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None of these numbers mean anything unless you have all 3 cars there, bone stock, and all have a completely full tank of gas. Every gallon of gas is 6 lbs. Different scales, different days, etc.
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      10-18-2021, 06:48 PM   #9
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Quote:
Originally Posted by VisualEcho View Post
None of these numbers mean anything unless you have all 3 cars there, bone stock, and all have a completely full tank of gas. Every gallon of gas is 6 lbs. Different scales, different days, etc.
First of all, This is not a scientific measurement. We did it just for fun and curiosity.

All measurements were done inbetween club racing session on same day.

Gas weight should relative the same since we all top of tank in the morning and run the same track with same track time(you could argue one never lift throttle).

The manual m2c and m2cs are all bone stock.

The reason I share is pretty rare to have a lot of m2s meet at same time with a scale.
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      10-18-2021, 06:55 PM   #10
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Quote:
Originally Posted by r3awak3n View Post
So if you go for some 763m on the comp that will drop a few more pounds. I really think bmw did not put the CS on the diet they shoulda have.
this is really the only conclusion i can make here... maybe 60 lb difference between m2cs and m2c w 788m's...

So i guess thats from the CF hood and removal of a few of those basic interior components.
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      10-18-2021, 07:01 PM   #11
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Quote:
Originally Posted by ASAP View Post
Quote:
Originally Posted by r3awak3n View Post
So if you go for some 763m on the comp that will drop a few more pounds. I really think bmw did not put the CS on the diet they shoulda have.
this is really the only conclusion i can make here... maybe 60 lb difference between m2cs and m2c w 788m's...

So i guess thats from the CF hood and removal of a few of those basic interior components.
Compared to the M2 Competition, the BMW M2 CS does get additional weight savings from the carbon fiber hood and carbon fiber roof, but it gets the Adaptive M Suspension as standard which likely adds some weight to the car.
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      10-18-2021, 07:56 PM   #12
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Quote:
Originally Posted by butraymond View Post
First of all, This is not a scientific measurement. We did it just for fun and curiosity.

All measurements were done inbetween club racing session on same day.

Gas weight should relative the same since we all top of tank in the morning and run the same track with same track time(you could argue one never lift throttle).

The manual m2c and m2cs are all bone stock.

The reason I share is pretty rare to have a lot of m2s meet at same time with a scale.
I can appreciate that, I'm just saying that with such small differences in weight between the cars the details really count.
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      10-18-2021, 08:03 PM   #13
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dct and half cage really beef up the weight of that OG m2
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      10-18-2021, 09:26 PM   #14
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Weight difference between M2s

788 = 101.8lbs
763 = 85.06lbs
So wheels are 16.7lbs difference.

Interestingly enough Car & Driver reported "A carbon-fiber hood and roof help the CS weigh 83 pounds less than the M2 Competition."

So the measurements seem pretty spot on.

Roof and bonnet take weight from higher points of the car and the supposedly added weight from active suspension moves it lower.

All academic really. The car feels pretty light to drive. in 10 years time as cars get heavier and heavier it will be classified as light weight anyway.
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      10-18-2021, 09:31 PM   #15
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Quote:
Originally Posted by r3awak3n View Post
So if you go for some 763m on the comp that will drop a few more pounds. I really think bmw did not put the CS on the diet they shoulda have.
The reduction in overall weight of the car will be minimal - but it's the unsprung weight reduction that matters and will actually be felt. I wish we'd have gotten the "old" blue caliper smaller brakes as standard on the M2c, as they are a lot lighter (again unsprung weight) than the massive 6/4-pot Brembos on the M2c, while being plenty adequate for a street car. If I were tracking the car, then I'd perhaps opt for the big boys. But given a choice, and for my driving, I'd have gone for the "old" setup.
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      10-19-2021, 05:42 AM   #16
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Quote:
Originally Posted by KevinC View Post
Quote:
Originally Posted by r3awak3n View Post
So if you go for some 763m on the comp that will drop a few more pounds. I really think bmw did not put the CS on the diet they shoulda have.
The reduction in overall weight of the car will be minimal - but it's the unsprung weight reduction that matters and will actually be felt. I wish we'd have gotten the "old" blue caliper smaller brakes as standard on the M2c, as they are a lot lighter (again unsprung weight) than the massive 6/4-pot Brembos on the M2c, while being plenty adequate for a street car. If I were tracking the car, then I'd perhaps opt for the big boys. But given a choice, and for my driving, I'd have gone for the "old" setup.
On track some people do swap back to blue caliper, it's a pretty decent brake for stock power m2/m2c and with more choices on brake pad, and also be able to downsize to 18"wheel.
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      10-19-2021, 07:26 AM   #17
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Quote:
Originally Posted by Davil View Post
788 = 101.8lbs
763 = 85.06lbs
So wheels are 16.7lbs difference.

Interestingly enough Car & Driver reported "A carbon-fiber hood and roof help the CS weigh 83 pounds less than the M2 Competition."

So the measurements seem pretty spot on.

Roof and bonnet take weight from higher points of the car and the supposedly added weight from active suspension moves it lower.

All academic really. The car feels pretty light to drive. in 10 years time as cars get heavier and heavier it will be classified as light weight anyway.
They're all pigs really, an ode to the posh brand. It's ok though, it is what it is.
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      10-19-2021, 10:43 AM   #18
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They're all pigs really
Hold my beer

-The future of automobiles
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      10-19-2021, 02:11 PM   #19
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I lost 20lbs. The car is the same lmao

My M2C is now faster.
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      10-19-2021, 02:40 PM   #20
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Quote:
Originally Posted by Moflow View Post
Hold my beer

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Dude, soooo true.


Quote:
Originally Posted by ChrisK View Post
I lost 20lbs. The car is the same lmao

My M2C is now faster.
It adds up to....feeling faster. It's all about the feel IMO.
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      10-19-2021, 03:11 PM   #21
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Quote:
Originally Posted by VisualEcho View Post
Quote:
Originally Posted by Davil View Post
788 = 101.8lbs
763 = 85.06lbs
So wheels are 16.7lbs difference.

Interestingly enough Car & Driver reported "A carbon-fiber hood and roof help the CS weigh 83 pounds less than the M2 Competition."

So the measurements seem pretty spot on.

Roof and bonnet take weight from higher points of the car and the supposedly added weight from active suspension moves it lower.

All academic really. The car feels pretty light to drive. in 10 years time as cars get heavier and heavier it will be classified as light weight anyway.
They're all pigs really, an ode to the posh brand. It's ok though, it is what it is.
That's true, the 135i is pretty light.
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      10-20-2021, 01:43 PM   #22
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Quote:
Originally Posted by KevinC View Post
The reduction in overall weight of the car will be minimal - but it's the unsprung weight reduction that matters and will actually be felt. I wish we'd have gotten the "old" blue caliper smaller brakes as standard on the M2c, as they are a lot lighter (again unsprung weight) than the massive 6/4-pot Brembos on the M2c, while being plenty adequate for a street car. If I were tracking the car, then I'd perhaps opt for the big boys. But given a choice, and for my driving, I'd have gone for the "old" setup.
I agree. I love the big brakes, it looks amazing and stops amazing but I would have been fine with the smaller ones because more wheel choice and tire choice. The small caliper actually be better for the track because more wheel/tire choice and easy to change the brake pads. Thats the annoying thing about the bbk, you have to remove the caliper to change the pads, if one tracks the car a lot (and car is not a track only car) it is going to get annoying real fast.

I guess this is where the AP kit comes in.
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