1M Weight Thread

[mPlasticDesign]

Originally Posted by ianf2002

1M is heavier though...

First time I have ever heard this. Everything I've read indicates the 1M is lighter due to the lighter (M3)suspension components, the sunroof delete, etc...

BMW NA Specs:

3373lbs Unladen = 135i
3362lbs Unladen = 1M

Besides, you are referring to curb weight which may or may not include the same options, fuel, cargo etc.

[mPlasticDesign]

Originally Posted by ianf2002

From what I have read the 1M may have lighter suspension etc, but wider track, heavier wheels etc all add up... maybe RHD differs for Australian market

Do a search, several publications will confirm the 1M is lighter.

I'll provide the first one in the Sticky: here.

"Solidly based on the oh-so-willing 1-Series coupe, the 1M takes every best aspect from the 135i, sheds some weight (35 kg to be exact) and extracts more juice from the N54B30HP twin-turbo inline 6-cylinder engine."

http://www.auto123.com/en/bmw/1-m-co...0&artid=131146

[PyratOne]

nice thread.

did I miss IND's carbon roof?

http://www.1addicts.com/forums/showthread.php?t=569459

for M3 weight went from 24lbs to 9.8lbs.

Edit: yup, i missed it. my bad

[mPlasticDesign]

Originally Posted by ianf2002

Well those weights are straight off bmw.com.au ... who knows, not much in it

I am sure your numbers are correct. The unladen specs I quoted are also from BMWUSA.com I am just saying different countries measure the kerb weight with different cargo, gas, passenger etc. Unladen is an apples to apples comparison because both cars have no cargo/passengers included in the figure. Just car vs. car. Just look at the different payload figures in your chart. It's higher in the 135 and the overall weight is still higher. It's just not an equal comparison, that's all.

[Papethova]

I weighed my 135, its posted on this site somewhere, I think it was 3255lbs with a tank of gas.

I will weigh my 1M the same way on the same scale when I get it state side.

[M3 Adjuster]

Originally Posted by Dan Parker

I love the stock wheels but that is a ton of unsprung weight! Good thread, subscribed.

The ARC group buy wheels in 18 x 10 are 20 lbs...a full 6-7 lbs per corner of unsprung weight..

[v1k0d3n]

Originally Posted by M3 Adjuster

The ARC group buy wheels in 18 x 10 are 20 lbs...a full 6-7 lbs per corner of unsprung weight..

I was going to look at buying advan rs wheels, and I know they're a lot lighter than the 1M wheels as well.

[Cuz5150]

Had my 135i on a new truck scale, with FULL tank of gas.

[simple_simon]

Originally Posted by M3 Adjuster

The ARC group buy wheels in 18 x 10 are 20 lbs...a full 6-7 lbs per corner of unsprung weight..

Will those clear the 1M brakes?

[TUNEDM3]

My 1m on scales with a full tank of gas....

[e82-v8]

I´ve got lightweight doors for the e82 with 4kg / each door inclusvie makrolon windows

That are about 50kg less than original
added with the carbon bonnet and the hood again minus +/-30kg

so why are you thinking about throwing away the musicmachine

[M3 Adjuster]

Originally Posted by simple_simon

Will those clear the 1M brakes?

They are an E46/E92 M3 setup, so yes they should fit.

[mPlasticDesign]

Originally Posted by TUNEDM3

My 1m on scales with a full tank of gas....

What options do you have? Stock wheels? Exhaust? Just curious. Tyanks

[GoingTooFast]

Originally Posted by EmmDrei

Looking at the list, it is interesting to note that the major save on the unsprung mass is due to the replacement of the brake disks:

40,2kg - 28,8kg = 11,4kg

The wheels represent 90,2kg - 79,6kg = 10,6kg

[Eyeman]

Cool thread. The weight reducing 135 guys fizzled out, hopefully this one will keep going.

Yep, removing the backseat if you don't use it is the best bang for your buck mod. The bottom cushion is very light but the hinged back piece is 50+ lbs.

The stock exhaust mufflers are heavy, removing those if you don't mind a louder exhaust makes since. I'm waiting to get another year or two outta my stock battery and then going lighter.

My car still weighed 3500lb when corner balanced including 3/4 tank and my spare tire donut, jack, and some tools. I'm now around 52/48 front to rear.

[mm1]

Originally Posted by GoingTooFast

Looking at the list, it is interesting to note that the major save on the unsprung mass is due to the replacement of the brake disks:

40,2kg - 28,8kg = 11,4kg

The wheels represent 90,2kg - 79,6kg = 10,6kg

That`s not brake discs, that`s full carbon ceramic brake rotors and calipers.

[GoingTooFast]

Originally Posted by mm1

That`s not brake discs, that`s full carbon ceramic brake rotors and calipers.

If you are right the list is wrong. Since the list specifies every and each weight detail I rather trust the list:

7,1kg (front disc w/ carbon ceramic brake rotor) / 7,3kg (rear disc w/ carbon ceramic brake rotor):


6,6kg (front caliper w/ pad) / 4,4kg (rear caliper w/ pad):



Total weight saving due to the discs -> 40,2kg (oem) - 28,8kg (Movit) = 11,4kg (as stated)

Total weight saving due to the calipers + pads -> 25,6kg (oem) - 22,0kg (Movit) = 3,6kg


Total weight saving due to the discs + calipers (& pads) = 11,4kg + 3,6kg = 15,0kg


(The wheels represent 'only' 10,6kg of saving on the unsprung mass)

[James T. Kirk]

What about the weight difference between a powered seat and a powered seat with Heat option?

[GoingTooFast]

Originally Posted by James T. Kirk

What about the weight difference between a powered seat and a powered seat with Heat option?

You should be focused on the weight reduction in unsprung mass, that is far more important! As a rule of thumb take note of this: 'Experts say that measures to reduce the unsprung mass have a benefit of up to four times the weight saving':

Secret 3: Weight reduction in unsprung mass 35 kg less weight in the parts directly connected to the wheels, such as wheels, tyres and brakes, leads to a perceptible gain in agility and driving pleasure. The latest forging techniques using materials from the aerospace industry guarantee strength and an unbeatable weight saving. For example, the AC Schnitzer lightweight 4-pot high performance brake system with retraction system for the front axle, and the lightweight brake discs on the front and rear axles, ensure the shortest braking distances. Or the Type VIII one-piece high-strength forged rims used on the AC Schnitzer 99d. These weigh in at just 7.9 kg per wheel and are connected to the vehicle with titanium wheel bolts. Experts say that measures to reduce the unsprung mass have a benefit of up to four times the weight saving. This means that in terms of agility, the AC Schnitzer 99d feels like a vehicle which overall weighs 335 kg less

AC Schnitzer Type VIII 225/35*19 Rim 7,9kg:






Based on the information disclosed in this thread the estimated weight of the ATS rims in the list is as follows:

• Front wheel (245/35*19): 21,8kg (oem & tire) - 19,5kg (ATS & tire) = 2,3kg --> 11,8kg (26,0lbs oem rim) - 2,3kg = 9,5kg
  
• Rear wheel (265/35*19) : 23,3kg (oem & tire) - 20,3kg (ATS & tire) = 3,0kg --> 12,2kg (26,8lbs oem rim) - 3,0kg = 9,2kg

Of course the rear rims should be heavier than the front rims since they are bigger but I'm using different sources of information - the list and this:

Front & Rear:





Nevertheless, around 9,5kg is a good estimate for the ATS rims!

[GoingTooFast]

There's nothing like the real thing:

The OEM 19x9” (245/35/19), 11,8kg, front and 19x10” (265/35/19), 12,2kg, rear can be replaced by the ATS SUPERLIGHT forged alloy wheel 8.5 x 19" for the front - weighs only 8.5kg and the 10.0 x 19" wheel for the rear axle - weighs only 8.8kg .

So, the ATS SUPERLIGHT rims, front and rear, are actually lighter than the estimated 9,5kg.



The recommended retail price of the 8.5 x 19" ATS SUPERLIGHT for the BMW is €1,200. The 10 x 19" model is €1,300. Both prices include VAT.

[LeMansM5]

Anyone know if the BMW performance wheel style 313 weigh less than the OEM 1M wheels?
BMW is writing as extremely light weight wheels.

[Whteverjklasdf]

This thread is worth a bump; i am thinking about stripping my incoming 1M and am wondering how much weight i can shave just by taking out various parts, such as backseats, sound padding etc.