Rear Subframe Structural Foam

Redd · 06-27-2016, 02:20 AM

Has anyone considered injecting the rear subframe with BMW Structural Foam for some added stiffness? The same stuff they use for E46 M3 subframe reinforcement and repair.

Just toying with the idea since I was going to get the rear subframe out to install solid bushes, and wanted to see if it made sense or if I was crazy.

What do you all think?

roastbeef · 06-27-2016, 03:14 AM

i haven't heard of an e9x m3 subframe ripping out. there were a few people with sheared diff bolts, but overall it isn't a common issue. i'm thinking the foam would be a waste.

Redd · 06-27-2016, 04:25 AM

There's no issue per se with the E9x M3 subframe. But thought it might help stiffen up the rear, like more of an upgrade.

Malek@MRF · 06-27-2016, 12:38 PM

There is no issue with the E9x chassis sub-frame mounting points, it's already incredibly rigid and stiff there. There would be no reason to do this.

06-27-2016, 02:20 AM	#1
Redd Brigadier General 3900 Rep 4,167 Posts Drives: 2010 BMW E92 M3 Dakar Edition Join Date: Jul 2015 Location: Malaysia iTrader: (0)	Rear Subframe Structural Foam Has anyone considered injecting the rear subframe with BMW Structural Foam for some added stiffness? The same stuff they use for E46 M3 subframe reinforcement and repair. Just toying with the idea since I was going to get the rear subframe out to install solid bushes, and wanted to see if it made sense or if I was crazy. What do you all think?
	Appreciate 0 Tweet Quote

06-27-2016, 03:14 AM	#2
roastbeef Lieutenant General 11586 Rep 12,728 Posts Drives: E92 M3 Join Date: Nov 2010 Location: Orange County, CA iTrader: (4)	i haven't heard of an e9x m3 subframe ripping out. there were a few people with sheared diff bolts, but overall it isn't a common issue. i'm thinking the foam would be a waste. __________________ Instagram; @roastbeefmike
	Appreciate 0 Quote

06-27-2016, 04:25 AM	#3
Redd Brigadier General 3900 Rep 4,167 Posts Drives: 2010 BMW E92 M3 Dakar Edition Join Date: Jul 2015 Location: Malaysia iTrader: (0)	There's no issue per se with the E9x M3 subframe. But thought it might help stiffen up the rear, like more of an upgrade.
	Appreciate 0 Quote

06-27-2016, 12:38 PM	#4
Malek@MRF BimmerPost Supporting Vendor 731 Rep 3,735 Posts Drives: E92 M3, E46 M3, G82 M4 Join Date: Jan 2008 Location: Irvine, California iTrader: (5)	There is no issue with the E9x chassis sub-frame mounting points, it's already incredibly rigid and stiff there. There would be no reason to do this. __________________ BMW PERFORMANCE SPECIALISTS. Race Engines. Suspension. F/I. Brakes. Race Preparation. Factory Service. Alignments. OFFICIAL PARTNERS: KW. MOTON. Brembo. AP Racing. BBS Motorsport. iND. HRE. Turner Motorsport. VAC. BMW Motorsport. Facebook \| Instagram \| Yelp! \| Flikr Phone: 949-233-0448 \| E-Mail: info@mrfengineering.com
	Appreciate 0 Quote