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M3 Track: Racing and DE Best mod for speed is learning to get the most out of what you currently have. Tracks and DE's is the place to start!


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Old Wed, Apr-25-2012, 08:33:38 PM   #1
ken o
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Default NASA TT e46 subframe bulletin

http://www.nasaforums.com/viewtopic.php?f=2&t=57011

TECHNICAL BULLETIN--BMW E46 models--Rear Sub-frame 4-24-12

All BMW E46 models in the 19992006 range

Allowance of repair and/or prevention of rear sub-frame connection point failures as noted in the settlement of the class action lawsuit settled 8-10-09 with BMW. The following modifications are permitted without a Modification Point or Modification Factor assessment, and are not intended as performance enhancing modifications:

The material used cannot exceed 0.110 (inches) in thickness. Plates may be trimmed to fit the area being repaired or reinforced. Any vertical offset of the sub-frame or suspension caused by the use of these plates is legal. Holes are allowed for the existing fasteners and for additional holes for rosette welds. Existing cracks or damage may be welded before the repair.
1. One plate (A) not to exceed 206MM x 108mm in size. Two bends are allowed to contour to chassis but must be included in overall size.
2. One plate (B) not to exceed 163mm x 81mm in size. One bend allowed to contour to chassis but must be included in overall size.
3. Two plates (C) not to exceed 134mm x 73mm in size, (one plate per side).
4. Two plates (D) not to exceed 66mm x 42mm in size, (one plate per side).
5. Two plates (E) not to exceed 82mm x 92mm in size, (one plate per side).

Plates (A), (B), (C), and (D), must be placed between the sub-frame and differential carrier and can be attached to the underbody by welding or bonding. Plate (E) can only be used in the trunk area to cover the access hole made to weld the top of the sub-frame connections, and can be attached by welding or bonding.

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Old Thu, Apr-26-2012, 05:16:26 AM   #2
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Default Re: NASA TT e46 subframe bulletin

nice....have you already had this done Ken?
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Old Thu, Apr-26-2012, 11:45:27 AM   #3
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Default Re: NASA TT e46 subframe bulletin

Yes. I had Vorshalg install it.
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Old Thu, Apr-26-2012, 12:46:01 PM   #4
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Default

The changes in the rules this year are crazy. You now have to take points for SMG, as it was optional equipment. Some would say the Comp package should cost points, as it is non factory equipment.


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Old Thu, Apr-26-2012, 03:15:49 PM   #5
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Default Re: NASA TT e46 subframe bulletin

Comp package might net you points for brakes since the calipers (rear) are different.
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Old Thu, Apr-26-2012, 03:25:46 PM   #6
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Default Re: NASA TT e46 subframe bulletin

Is it safe to assume that all currently available reinforcement kits meet this requirement? It would seem logical to measure the Turner kit (for example) and build the rule on those dimensions. But then we all know how governing bodies like to make life interesting.
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Old Thu, May-24-2012, 04:20:57 PM   #7
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Default Re: NASA TT e46 subframe bulletin

The measurements for this bulletin are very close to the Turner kit making it 100% legal to use.
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Discussing NASA TT e46 subframe bulletin in the M3 Track: Racing and DE Forum - Best mod for speed is learning to get the most out of what you currently have. Tracks and DE's is the place to start! at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)