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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > M3 vs Non-M Front Subframe



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      07-23-2020, 10:23 AM   #23
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Originally Posted by ornicar View Post
Do you know why 1 series E82 don'h have this V black bracing?

My idea is that maybe we (1 serie owners) could fit the thorough M3 Reinforcment plate (without cut). It would be great

Thanks
Likely due to cost cutting. For example, the E90 doesn't have any rear subframe reinforcement like the E91, E92 or E93.
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      07-23-2020, 10:20 PM   #24
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I have often wondered if the rear brace from a M3 would make much of a difference.
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      07-23-2020, 11:15 PM   #25
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I have often wondered if the rear brace from a M3 would make much of a difference.
I fitted the E9x M3 rear subframe brace onto my E90 and it helped the chassis feel much more solid:



Info here: https://www.e90post.com/forums/showp...postcount=4300
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      07-24-2020, 12:43 AM   #26
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Thank you
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      08-01-2020, 10:17 AM   #27
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A word of warning. Having just attempted the 'freedomfries' double bar brace solution, anyone from the UK or Europe, be aware. If your car is fitted with electric steering, the rack is about double the size in circumference (due to the electric motor) and sits below the line taken by the nearside brace.

I had to make cut-outs in the bar and insert packing pieces between the brace and subframe to create the necessary clearance. I guess the same clearance issues would also apply if trying to fit the M3 alloy reinforcing panel. It will foul on the steering rack. Just so you're aware...
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      08-01-2020, 02:38 PM   #28
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Quote:
Originally Posted by Phil325i View Post
A word of warning. Having just attempted the 'freedomfries' double bar brace solution, anyone from the UK or Europe, be aware. If your car is fitted with electric steering, the rack is about double the size in circumference (due to the electric motor) and sits below the line taken by the nearside brace.

I had to make cut-outs in the bar and insert packing pieces between the brace and subframe to create the necessary clearance. I guess the same clearance issues would also apply if trying to fit the M3 alloy reinforcing panel. It will foul on the steering rack. Just so you're aware...
Thanks a lot for your feedback and warning!

So i am going to have some issues to fit the M3 reinforcement plate that i just come to buy....

do you have some photos maybe?
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      08-02-2020, 04:12 AM   #29
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Quote:
Originally Posted by ornicar View Post
Thanks a lot for your feedback and warning!

So i am going to have some issues to fit the M3 reinforcement plate that i just come to buy....

do you have some photos maybe?
I didn't go for the reinforcement plate but the 'two bar' alternative. I think you will need to cut away a portion of the plate to avoid fouling the steering rack motor. How much that will weaken the plate I don't know.
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      08-03-2020, 07:12 PM   #30
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Quote:
Originally Posted by Phil325i View Post
I didn't go for the reinforcement plate but the 'two bar' alternative. I think you will need to cut away a portion of the plate to avoid fouling the steering rack motor. How much that will weaken the plate I don't know.
That M3 plate does have a big area impressed into it that hangs lower to make clearance under the steering rack. I haven’t seen the steering rack motor you speak of but it’s possible the M3 plate will fit over it, or fit with only minor material removal because the plate isn’t flat over that area.

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      08-04-2020, 02:27 AM   #31
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Quote:
Originally Posted by Biginboca View Post
That M3 plate does have a big area impressed into it that hangs lower to make clearance under the steering rack. I havenít seen the steering rack motor you speak of but itís possible the M3 plate will fit over it, or fit with only minor material removal because the plate isnít flat over that area.
You could be right. This might give you an idea how much bigger the electric rack is than the hydraulic one:

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      08-04-2020, 02:30 AM   #32
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Quote:
Originally Posted by Phil325i View Post
Quote:
Originally Posted by Biginboca View Post
That M3 plate does have a big area impressed into it that hangs lower to make clearance under the steering rack. I haven't seen the steering rack motor you speak of but it's possible the M3 plate will fit over it, or fit with only minor material removal because the plate isn't flat over that area.
You could be right. This might give you an idea how much bigger the electric rack is than the hydraulic one:

Attachment 2380703
another one in place on the subframe.
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      08-04-2020, 02:41 AM   #33
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Quote:
Originally Posted by ornicar View Post
another one in place on the subframe.
Thanks ornicar. When fitting the 'two bars', I found it's the bulky area to the left in the picture (above what looks like a drain plug) that sits below the subframe by about 3cm. However if you're trying to fit the reinforcement plate, I think the whole of the motor would foul the plate. Hence my comment about possibly risking the integrity/strength of the plate by the amount of material you would have to remove.

Hopefully someone will try this soon and let us know what happens...
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      08-04-2020, 02:57 AM   #34
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Quote:
Originally Posted by Phil325i View Post
Quote:
Originally Posted by ornicar View Post
another one in place on the subframe.
Thanks ornicar. When fitting the 'two bars', I found it's the bulky area to the left in the picture (above what looks like a drain plug) that sits below the subframe by about 3cm. However if you're trying to fit the reinforcement plate, I think the whole of the motor would foul the plate. Hence my comment about possibly risking the integrity/strength of the plate by the amount of material you would have to remove.

Hopefully someone will try this soon and let us know what happens...
It's going to be very, very tight

I will do a test in September.

opening a small "window" around the motor is going to be mandatory I think and maybe add a stiffener to compensate.

Which tool did you use to put in place the M10 inserts?
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      08-04-2020, 03:05 AM   #35
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Quote:
Originally Posted by ornicar View Post
Which tool did you use to put in place the M10 inserts?
I used this method:



but it takes some muscle power!

Good luck with the install.
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