E9x solid vs. M3 subframe bushings

mfran615 · 10-04-2021, 07:50 AM

I will be replacing my subframe bushings soon and am wondering if there is a huge difference between solid and M3 rubber bushings. I know that the M3 bushings are much stiffer, but am also wondering if the effects of solid bushings are that much more noticeable over the M3 bushings.

bbnks2 · 10-04-2021, 08:41 AM

Quote:

Originally Posted by mfran615

I will be replacing my subframe bushings soon and am wondering if there is a huge difference between solid and M3 rubber bushings. I know that the M3 bushings are much stiffer, but am also wondering if the effects of solid bushings are that much more noticeable over the M3 bushings.

Don't do all this work to install M3 bushings. Just go straight to something like Delrin or solid. There is very little added NHV. Even BMW went back to solid mounted rear subframes.

mfran615 · 10-04-2021, 08:53 AM

Quote:

Originally Posted by bbnks2

Quote:

Originally Posted by mfran615

I will be replacing my subframe bushings soon and am wondering if there is a huge difference between solid and M3 rubber bushings. I know that the M3 bushings are much stiffer, but am also wondering if the effects of solid bushings are that much more noticeable over the M3 bushings.

Don't do all this work to install M3 bushings. Just go straight to something like Delrin or solid. There is very little added NHV. Even BMW went back to solid mounted rear subframes.

That's what I needed to hear. Going to order the turner solids. Are there any good write-ups around here? I've searched a lot and have come up with nothing.

Volasko · 10-04-2021, 09:06 AM

Unless you have all the necessary tooling and presses to do this job I wouldn't touch this job with a 10 foot pole. I tried to do it myself (M3 bushings) using a home made rig and press and it wasn't fun, I destroyed a few bushings doing it this way. I can only image solid bushings being even more of a hassle.

Biginboca · 10-04-2021, 03:42 PM

I used the eBay removal tool and installed the Condor Speed Shop Delrin bushings and the job was pretty painless on jackstands.

I didn’t want to drop the subframe completely from the car so I ended up cutting the upper Delrin inserts into halves to ease slipping them in between the body and subframe. Here’s some of my pics and comments from my install…

https://www.e90post.com/forums/showp...&postcount=646

TyroneShoelaces · 10-04-2021, 04:11 PM

Quote:

Originally Posted by Biginboca

I used the eBay removal tool and installed the Condor Speed Shop Delrin bushings and the job was pretty painless on jackstands.

I didn’t want to drop the subframe completely from the car so I ended up cutting the upper Delrin inserts into halves to ease slipping them in between the body and subframe. Here’s some of my pics and comments from my install…

https://www.e90post.com/forums/showp...&postcount=646

Hey I'm up in Melbourne a couple hours north. Wanna rent out that tool?

My subframe is on the ground right now, and can't decide if I want to go through the hassle of upgrading the mounts. Not having to dream up the tool out of a bunch of random items might make it more tempting to do

Biginboca · 10-04-2021, 05:49 PM

Quote:

Originally Posted by TyroneShoelaces

Hey I'm up in Melbourne a couple hours north. Wanna rent out that tool?

My subframe is on the ground right now, and can't decide if I want to go through the hassle of upgrading the mounts. Not having to dream up the tool out of a bunch of random items might make it more tempting to do

Hey, right now I have the tool on loan to a buddy but would let you use it once he’s done with it.

mad1stgen · 10-05-2021, 06:53 PM

Quote:

Originally Posted by TyroneShoelaces

Hey I'm up in Melbourne a couple hours north. Wanna rent out that tool?

My subframe is on the ground right now, and can't decide if I want to go through the hassle of upgrading the mounts. Not having to dream up the tool out of a bunch of random items might make it more tempting to do

Doing these bushings on a wagon is a MUST, gets rid of the rear end jiggle the heavy wagons are so prone to.

Use the tool, and condor UHMW bushings. Easy.

tetsuo111 · 10-12-2021, 02:37 PM

Like bbnks2 mentioned, if you go through the effort to install new RSBs, skip to billet or a material with minimal compliance (delrin, poly, etc).

The result is virtually no increase in NVH, but a remarkable increase in control of the loose rear-end.

BMW moved to solid-mount subframes on the F series, so this is really an OEM mod. All upside and no drawbacks.

Maxmax73 · 10-15-2021, 09:40 AM

Quote:

Originally Posted by tetsuo111

Like bbnks2 mentioned, if you go through the effort to install new RSBs, skip to billet or a material with minimal compliance (delrin, poly, etc).

The result is virtually no increase in NVH, but a remarkable increase in control of the loose rear-end.

BMW moved to solid-mount subframes on the F series, so this is really an OEM mod. All upside and no drawbacks.

On F80/M, but not F30 regular cars.

10-04-2021, 07:50 AM	#1
mfran615 Private 11 Rep 65 Posts Drives: 2011 335is 6MT Join Date: Dec 2015 Location: OH iTrader: (0)	E9x solid vs. M3 subframe bushings I will be replacing my subframe bushings soon and am wondering if there is a huge difference between solid and M3 rubber bushings. I know that the M3 bushings are much stiffer, but am also wondering if the effects of solid bushings are that much more noticeable over the M3 bushings.
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10-04-2021, 09:06 AM	#4
Volasko Colonel 757 Rep 2,618 Posts Drives: 06 330i E90, 18 530xe G30 Join Date: Dec 2010 Location: Toronto iTrader: (2) Garage List 2018 BMW 530e M Sport [9.00] 2006 BMW E90 330i [8.28]	Unless you have all the necessary tooling and presses to do this job I wouldn't touch this job with a 10 foot pole. I tried to do it myself (M3 bushings) using a home made rig and press and it wasn't fun, I destroyed a few bushings doing it this way. I can only image solid bushings being even more of a hassle.
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10-04-2021, 03:42 PM	#5
Biginboca Colonel 3862 Rep 2,739 Posts Drives: 2009 E92 328i 6MT Join Date: Jun 2017 Location: Boynton Beach, FL... USA iTrader: (3)	I used the eBay removal tool and installed the Condor Speed Shop Delrin bushings and the job was pretty painless on jackstands. I didn’t want to drop the subframe completely from the car so I ended up cutting the upper Delrin inserts into halves to ease slipping them in between the body and subframe. Here’s some of my pics and comments from my install… https://www.e90post.com/forums/showp...&postcount=646 __________________ My E92 328csl Build Thread My 328csl Instagram Page
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10-12-2021, 02:37 PM	#9
tetsuo111 Save the Manuals! 1265 Rep 1,239 Posts Drives: E91 RWD 6MT, X3, Ducati S4R Join Date: Dec 2014 Location: PNW iTrader: (0) Garage List 2011 E91 6MT RWD &q ... [0.00] 2005 Ducati S4R 996 [0.00] 2000 Ducati M750 [0.00] RIP - 2011 E91 328i ... [10.00]	Like bbnks2 mentioned, if you go through the effort to install new RSBs, skip to billet or a material with minimal compliance (delrin, poly, etc). The result is virtually no increase in NVH, but a remarkable increase in control of the loose rear-end. BMW moved to solid-mount subframes on the F series, so this is really an OEM mod. All upside and no drawbacks. __________________ 2011 6MT RWD ClubSport Wagon \| 3,185lbs \| 1 of 149 ZSPs delivered in North America Outside: BMW M-Aero, Euro region lighting, Seibon \| Inside: M3 cockpit, Recaro SPG, Prototipo, AutoSolutions SSK, UCP \| Stop: M3 ST-40R, PFC \| Grip: Solid-mounted subframes, rear coilover conversion, M3 Nitron R3, Hyperco, SPL, AKG, ARC8 \| Go: StageFP, CF snorkel, 3IM, MILVs, SuperSprint headers, Dundon Motorsports Inconel exhaust, VoltPhreaks \| Cool: CSF \| PCA #2018100384 \| BMW CCA #505794
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