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///M3 Forum
The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 01-27-2012, 06:06 AM   #81
M3_Aaron
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Flossmann fenders will run you around $1300 plus paint and install.

I think you would be compromising your safety with CF doors, you want a roll cage with some substantial side bars before going down that path.
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Old 01-27-2012, 04:15 PM   #82
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Flossmann fenders will run you around $1300 plus paint and install.

I think you would be compromising your safety with CF doors, you want a roll cage with some substantial side bars before going down that path.
compromise safety with CF?

your probably thinking of 1-2layers of cf drapped over fiberglass core, like most low-medium production hoods...
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Old 01-27-2012, 04:40 PM   #83
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You can't rely of carbon fibre (irrespective of quality) as you only means of side impact protection. OEM doors have intrusion bars built into them.

There is also the small issue of carbon splintering into the cabin on impact.
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Old 01-27-2012, 07:29 PM   #84
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You can't rely of carbon fibre (irrespective of quality) as you only means of side impact protection. OEM doors have intrusion bars built into them.

There is also the small issue of carbon splintering into the cabin on impact.
If your getting hit hard enough to splinter 10+layers of cf then you have more worries than the splintering of cf.

Yet to see any impact that would do that, that steel version would have 'saved' the occupant from injury.

And if your that worried about 'safety', then a rollcage is the only way to go. CF or not



That intrusion bar in the e46 doors, aint gonna do much in a hard crash...

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Old 01-28-2012, 08:09 AM   #85
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If your getting hit hard enough to splinter 10+layers of cf then you have more worries than the splintering of cf.

Yet to see any impact that would do that, that steel version would have 'saved' the occupant from injury.

And if your that worried about 'safety', then a rollcage is the only way to go. CF or not



That intrusion bar in the e46 doors, aint gonna do much in a hard crash...
You're just wrong. The doors, and the beams within them, are a significant and serious safety feature. That's the purpose of the beam and hook (anchor) on the pic you posted above.

Quote:
Diagonal aluminium cross-members are embedded within each door and ensure that the doors and side walls are exceptionally strong and stiff, preventing intrusion of external objects into the cabin. Furthermore, extra-strong locks and hinges, reinforcement in the seat and armrest areas and additional synthetic absorption elements all help reduce the impact forces that are transmitted to the cabin.
http://www.bmw.com/com/en/insights/t...rotection.html

Certain a cage is safer if you're wearing a helmet (otherwise you'll hit your head on the cage and die). But if you're wearing a helmet you need a hans device to protect from neck injury in a crash. For a hans to work you need a harness. If you have all that you'll be much better off in a crash, but suddenly you're much more likely to be in a (street) crash because you can't turn your head significantly in either redirection or lean forwards to see traffic coming.

So, in short... keeping the stock doors and no cage is the safe way to go for street use.
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Old 01-28-2012, 08:10 AM   #86
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Oh, and my (2315 lb) e36 M3 track car has a cage and hollowed out doors

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Old 01-28-2012, 09:02 AM   #87
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Op, something no one has mentioned that you could look into since you want to keep some civility.
Try to source some manual door windows. Not sure if BMW offered manual front windows anywhere on the E46 but a pair from any coupe would fit. Assuming the glass uses the same attachment points.
I'm sure deleting that motor and regulator would save a few pounds per door.

also, not sure if BMW does this, but I know I'm the WRC world. A thinner glass is used in the front and rear windshield on certain special models. Now that I think about it, I think the E36 M3 Ltw had this.
That could be somethin to look into with the CSL model.
A mm less thick over that wide space of glass could be significant savings.

In the motorcycle world, we trim wiring harnesses, this can save surprising weight. By trimming away non essential electrical wiring. But understand. This is permanent and really fux resale value off the track.
Some guys will buy a spare harness and keep for resale time. But in this case I don't think that's a cheap option.
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Old 01-28-2012, 09:08 AM   #88
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oh yeah, and compare tire weights. michelin came out with a motorcycle tire that weighs 2 lbs less than the competitors, and people say it feels like aftermarket lightweight wheels in their handling.
So if anyone makes a car tire thats got some other reinforcement other than metal, to lose weight, might want to consider those.
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Old 01-29-2012, 08:28 AM   #89
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You can't do manual windows on the coupe because of the way they go up/down whenever you open the door to seal properly.

You could delete the rear pop functionality.
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Old 01-29-2012, 08:48 AM   #90
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Here's weights for all of the stuff I've taken out of the M3 (in lbs).

Front
Fog Lights & Ducts: 7.6
A/C Delete (minus Evaporator): 29.7
Microfilter Housing Delete & Back Panel: 11
Front Mats: 3
Aux Fan: 8
Clutch Fan: 4
Xenon>Halogen: 7 total

Middle
Armrest Delete: 5
APEX ARC-8's over Stock 18's: 28.1
Sparco Evo's w/ Aluminum Sparco Mounts, Sliders, & E46 Bracket: 58 over stock

Rear

Seat Bottom: 13.3
Seat Left: 12.7
Seat Right: 25
Seat Bolsters: 5
Seat Insulation: 9.5
Seat Hardware/Misc.: 5
Bolster Insulation: 5
Door Panels: 10
Trunk Foam Piece: 8.5
Trunk Side Trim: 2
Trunk Carpet: 6.9
Trunk Floor: 6.3
Trunk Top & Tool Kit: 4.9
Carpet: 17.4
Headrests: 3
H/K Sub Enclosure: 7.5
Deck Sound Deadening: 4
Belt Receptacles: 4
Deck Misc.: 3
Mats: 1.5

Total Weight Loss: 293.9lbs

This brings the total weight of my car (no driver, no gas) down to around 3080lbs. This is with SMG, Nav, Sunroof, PDC, Premium, & H/K. Still more to come out.
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Old 01-29-2012, 10:04 AM   #91
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Oh yeah. Good call obioban. Forgot about that.
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Old 01-29-2012, 12:49 PM   #92
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I'm dumb... Forgot to weight the rotora calipers, but they were significantly lighter. I'd say at least 3lbs per caliper. Still need to install the rears. I Think it will be around a 10 lbs savings, for all 4 corners.

Putting me roughly at 3070 lbs.

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SOLD: :( E46 M3 SMG; Evolve-R Tune; much, much more... 2980 lbs.

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Old 01-29-2012, 01:25 PM   #93
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Originally Posted by MasterC17 View Post
Here's weights for all of the stuff I've taken out of the M3 (in lbs).

Front
Fog Lights & Ducts: 7.6
A/C Delete (minus Evaporator): 29.7
Microfilter Housing Delete & Back Panel: 11
Front Mats: 3
Aux Fan: 8
Clutch Fan: 4
Xenon>Halogen: 7 total

Middle
Armrest Delete: 5
APEX ARC-8's over Stock 18's: 28.1
Sparco Evo's w/ Aluminum Sparco Mounts, Sliders, & E46 Bracket: 58 over stock

Rear

Seat Bottom: 13.3
Seat Left: 12.7
Seat Right: 25
Seat Bolsters: 5
Seat Insulation: 9.5
Seat Hardware/Misc.: 5
Bolster Insulation: 5
Door Panels: 10
Trunk Foam Piece: 8.5
Trunk Side Trim: 2
Trunk Carpet: 6.9
Trunk Floor: 6.3
Trunk Top & Tool Kit: 4.9
Carpet: 17.4
Headrests: 3
H/K Sub Enclosure: 7.5
Deck Sound Deadening: 4
Belt Receptacles: 4
Deck Misc.: 3
Mats: 1.5

Total Weight Loss: 293.9lbs

This brings the total weight of my car (no driver, no gas) down to around 3080lbs. This is with SMG, Nav, Sunroof, PDC, Premium, & H/K. Still more to come out.
So if I do trunk carpet, mat, top/tool kit, and side trim... That's another 19 lbs I can drop off the car. Putting me around 3050 lbs! Not counting the evap, which is about another 10 lbs off.

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Current: 1969 Ford Mustang; 351w; Champion 4 row alu rad; Edelbrock Intake Manifold; Holley 600 CFM Carb; Cragar Wheels; 215/60-15 f, 255/60-15 r; Doug Tri-Y Headers; Dual Side Exit w/Xpipe; MSD 6AL; Electric Fuel Pump; U/D Pulley Set; Monte Carlo Bar.

SOLD: :( E46 M3 SMG; Evolve-R Tune; much, much more... 2980 lbs.

Home biz info: www.HelpMeFightTheForcesOfEvil.com

Last edited by Tarmac_E46_M3; 01-29-2012 at 04:04 PM.
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Old 01-29-2012, 04:08 PM   #94
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You can't do manual windows on the coupe because of the way they go up/down whenever you open the door to seal properly.

You could delete the rear pop functionality.
I actually thought of deleting the rear window motor thing.... But doing so while doing lexan in its place I want it to look as "Oem" as possible, meaning black rivets or screws to hold it in, with the black trim like the Oem glass.

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Current: 1969 Ford Mustang; 351w; Champion 4 row alu rad; Edelbrock Intake Manifold; Holley 600 CFM Carb; Cragar Wheels; 215/60-15 f, 255/60-15 r; Doug Tri-Y Headers; Dual Side Exit w/Xpipe; MSD 6AL; Electric Fuel Pump; U/D Pulley Set; Monte Carlo Bar.

SOLD: :( E46 M3 SMG; Evolve-R Tune; much, much more... 2980 lbs.

Home biz info: www.HelpMeFightTheForcesOfEvil.com
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Old 01-29-2012, 10:25 PM   #95
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You're just wrong. The doors, and the beams within them, are a significant and serious safety feature. That's the purpose of the beam and hook (anchor) on the pic you posted above.



http://www.bmw.com/com/en/insights/t...rotection.html

Certain a cage is safer if you're wearing a helmet (otherwise you'll hit your head on the cage and die). But if you're wearing a helmet you need a hans device to protect from neck injury in a crash. For a hans to work you need a harness. If you have all that you'll be much better off in a crash, but suddenly you're much more likely to be in a (street) crash because you can't turn your head significantly in either redirection or lean forwards to see traffic coming.

So, in short... keeping the stock doors and no cage is the safe way to go for street use.
In short its all just a what if, neither of us would be 'right/wrong' untill we replaced the door and did crash tests and compared it side by side.
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Old 01-29-2012, 10:37 PM   #96
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Don't they make supercars with cf doors and whatnot?

Same same, isn't it?

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Current: 1969 Ford Mustang; 351w; Champion 4 row alu rad; Edelbrock Intake Manifold; Holley 600 CFM Carb; Cragar Wheels; 215/60-15 f, 255/60-15 r; Doug Tri-Y Headers; Dual Side Exit w/Xpipe; MSD 6AL; Electric Fuel Pump; U/D Pulley Set; Monte Carlo Bar.

SOLD: :( E46 M3 SMG; Evolve-R Tune; much, much more... 2980 lbs.

Home biz info: www.HelpMeFightTheForcesOfEvil.com
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Old 01-30-2012, 05:14 AM   #97
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In short its all just a what if, neither of us would be 'right/wrong' untill we replaced the door and did crash tests and compared it side by side.
Not at all. I linked to BMW specifically stating what those beams are and now they function. I can't understand how you think there's any room for doubt here.
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Old 01-30-2012, 05:16 AM   #98
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Don't they make supercars with cf doors and whatnot?

Same same, isn't it?

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Lots of cars don't have the anchor system or door beams. Different design overall, or just less safe.
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Old 01-30-2012, 10:09 AM   #99
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Ah, very well then!
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Current: 1969 Ford Mustang; 351w; Champion 4 row alu rad; Edelbrock Intake Manifold; Holley 600 CFM Carb; Cragar Wheels; 215/60-15 f, 255/60-15 r; Doug Tri-Y Headers; Dual Side Exit w/Xpipe; MSD 6AL; Electric Fuel Pump; U/D Pulley Set; Monte Carlo Bar.

SOLD: :( E46 M3 SMG; Evolve-R Tune; much, much more... 2980 lbs.

Home biz info: www.HelpMeFightTheForcesOfEvil.com
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Old 01-31-2012, 05:45 PM   #100
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So if I do trunk carpet, mat, top/tool kit, and side trim... That's another 19 lbs I can drop off the car. Putting me around 3050 lbs! Not counting the evap, which is about another 10 lbs off.

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I can't decide whether I want to rip apart the dash to do the evaporator, probably will end up doing it though. Currently I'm in the process of doing a sunroof delete and replacing with a carbon insert. Should save 30-35lbs. I'm trying to get under 3000lbs w/o driver or fuel.
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