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Old 28-01-2021, 12:28 PM
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sonu_anand sonu_anand is offline
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Default Rear subframe strengthening

Can someonw please recommend garages that will strengthen the subframe?
What cost am I looking at?

I did look at the other threads but could not find a list of recommended places.
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Old 28-01-2021, 04:37 PM
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Previous owner of mine had it done at "XS Racing" but I can't find any contact details for them anymore - not sure if they go under a different name now...
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  #3  
Old 28-01-2021, 04:48 PM
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Quote:
Originally Posted by 137699 View Post
Previous owner of mine had it done at "XS Racing" but I can't find any contact details for them anymore - not sure if they go under a different name now...
thanks.

I'll start a list:

Redish Motorsport
Munich Legends ?
XS Racing
Cracknell's Garage

Last edited by sonu_anand; 28-01-2021 at 06:21 PM.
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Old 28-01-2021, 04:56 PM
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Old thread but there a some companies mentioned in this thread,




https://www.z3mcoupe.com/forum/showt...+garage&page=4




(may be out of date)
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Old 28-01-2021, 06:04 PM
Fat Tony Fat Tony is offline
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Funnily enough I spoke to a garage about this just yesterday as I'm looking to have mine thoroughly inspected this year - the rubber in the diff bush has partially torn so while I'm getting that squeaky thing replaced I might as well look at getting the whole lot checked out and reinforced if necessary.

My local indie also service an M Roadster and mentioned that the owner had the boot reinforced by Cracknell's Garage (based near Harrogate area). They've done a good looking job apparently according to my indie, though I've not seen the work myself.

I phoned Cracknell's and it turns out that they've done at least 2 M Roadsters - one using a Randy Forbes kit, the other using kit that they've made themselves.

Cost-wise they've quoted £1200 + diff bush

I'll also be speaking to another couple of outfits (more track/race car focussed) so will post up once I've further info from them
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Old 28-01-2021, 10:10 PM
urquattrogus urquattrogus is offline
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The Randy Forbes kit looks good but is quite pricey to get over here to the UK and can be more or less replicated by most skilled fabricators.

Anyone checking their boot floor just another warning that to fully check the spot welds etc you have peel back the sound deadening and seam sealer, mine looked fine until I did that and then I saw a few spot welds starting to go.

You can also buy a new stock diff ear assembly from BMW for about £30 if you want to replace the old one like for like or perhaps the new one is slightly thicker

Last edited by urquattrogus; 28-01-2021 at 10:12 PM.
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Old 29-01-2021, 02:15 PM
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There is a good video of a company in the States doing reinforcement work,




https://www.z3mcoupe.com/forum/showthread.php?t=20290
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Old 29-01-2021, 04:05 PM
urquattrogus urquattrogus is offline
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I found this post from bimmerforums (and by one poster) useful, the animation makes a lot of sense to me

https://www.bimmerforums.com/forum/s...-mount-failure

https://www.ascfabrics.com/post/trunkfloor
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Old 29-01-2021, 08:29 PM
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Quote:
Originally Posted by urquattrogus View Post
I found this post from bimmerforums (and by one poster) useful, the animation makes a lot of sense to me

https://www.bimmerforums.com/forum/s...-mount-failure

https://www.ascfabrics.com/post/trunkfloor
Agreed...and underpins the argument for polybush subframe mounts coupled with an oem differential mounting bush
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Old 02-02-2021, 01:07 PM
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Been quoted £4200 by Redish for the Randy Forbes Z3 Boot Floor Kit supply and fit. They probably do other strengthening work I'd assume for that price.
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