E36 M3 Bumpstops

TXM32B · 04-14-2011, 05:54 PM

Do the front and rear bumpstops need to be replaced with the E36 M3 bumpstops if you want more travel with the Eibach springs?

tlp · 04-14-2011, 06:09 PM

Short Answer = Front Yes, Rear No

TXM32B · 04-14-2011, 06:25 PM

Why not the rears? Do only the front supports need to be shaved?

isugoo · 04-14-2011, 06:46 PM

Quote:

Originally Posted by TXM32B

Why not the rears? Do only the front supports need to be shaved?

Don't know why but that's what Dinan did and people like to make their budget Dinan state I suspension kit this way.

tlp · 04-14-2011, 06:50 PM

Try doing a search around here. There is a lot of data. There is plenty of travel movement with the eibach rears. Front travel is shortened but recaptured with e36 bumpstops and shaved guides.

aus · 04-14-2011, 06:56 PM

Anyone try shaving the front guides? Just wondering how hard it would be to do?

Malek@MRF · 04-15-2011, 10:36 PM

If you are going to lower your M3 and intend on keeping the factory dampers, EDC or not, you must replace the front bump-stops with the E36 M3 units and you must shave the upper guide supports a specific amount.

This is the only right way of doing it. You cannot just go about and slap the springs on.

The rear is fine, it has enough travel.

-Malek

testpiloot · 09-09-2022, 08:59 AM

Quote:

Originally Posted by Malek@MRF

If you are going to lower your M3 and intend on keeping the factory dampers, EDC or not, you must replace the front bump-stops with the E36 M3 units and you must shave the upper guide supports a specific amount.

This is the only right way of doing it. You cannot just go about and slap the springs on.

The rear is fine, it has enough travel.

-Malek

Will this damage the shocks due to them being more compressed all over and creating a bit more travel? What about the valves etc?

TboneS54 · 09-09-2022, 10:58 AM

The dampers' shaft being a bit lower wouldn't, but stiffer springs are asking more of the dampers, and that probably wears them out faster. I think it's two-fold, not even so much faster wear, but more noticeable as the stock dampers weren't valved for the rebound that stiffer springs need.

The better, but $800 more expensive move, is to pair the springs with bilstein B8s.

x3sm · 09-09-2022, 07:17 PM

Quote:

Originally Posted by TboneS54

The dampers' shaft being a bit lower wouldn't, but stiffer springs are asking more of the dampers, and that probably wears them out faster. I think it's two-fold, not even so much faster wear, but more noticeable as the stock dampers weren't valved for the rebound that stiffer springs need.

The better, but $800 more expensive move, is to pair the springs with bilstein B8s.

do you still need to shave the upper guide supports if doing Bilstein B8s with eibach?

nrubenstein · 09-10-2022, 12:15 PM

The why not on the rear is because they use a Z4 part in back.

04-14-2011, 05:54 PM	#1
TXM32B Private First Class 36 Rep 156 Posts Drives: 2009 E90 M3 Join Date: May 2008 Location: Houston, TX iTrader: (0)	E36 M3 Bumpstops Do the front and rear bumpstops need to be replaced with the E36 M3 bumpstops if you want more travel with the Eibach springs?
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04-14-2011, 06:09 PM	#2
tlp Colonel 276 Rep 2,216 Posts Drives: 991 GT3, Sold:'11 e92 M3 SG/FR Join Date: Jul 2005 Location: Las Vegas/SoCal iTrader: (6) Garage List SOLD 2011 BMW e92 M3 [9.10]	Short Answer = Front Yes, Rear No __________________ 991 GT3, Sold: '11 e92 M3 SG/FR ZCP\|ZCV\|ZP2\|2MK\|494\|415\|6NR\|752
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04-14-2011, 06:25 PM	#3
TXM32B Private First Class 36 Rep 156 Posts Drives: 2009 E90 M3 Join Date: May 2008 Location: Houston, TX iTrader: (0)	Why not the rears? Do only the front supports need to be shaved?
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04-14-2011, 06:50 PM	#5
tlp Colonel 276 Rep 2,216 Posts Drives: 991 GT3, Sold:'11 e92 M3 SG/FR Join Date: Jul 2005 Location: Las Vegas/SoCal iTrader: (6) Garage List SOLD 2011 BMW e92 M3 [9.10]	Try doing a search around here. There is a lot of data. There is plenty of travel movement with the eibach rears. Front travel is shortened but recaptured with e36 bumpstops and shaved guides. __________________ 991 GT3, Sold: '11 e92 M3 SG/FR ZCP\|ZCV\|ZP2\|2MK\|494\|415\|6NR\|752
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04-14-2011, 06:56 PM	#6
aus Major General 892 Rep 9,032 Posts Drives: Odysse Join Date: Jul 2005 Location: Seal Beach, CA iTrader: (10)	Anyone try shaving the front guides? Just wondering how hard it would be to do? __________________ Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."
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04-15-2011, 10:36 PM	#7
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)	If you are going to lower your M3 and intend on keeping the factory dampers, EDC or not, you must replace the front bump-stops with the E36 M3 units and you must shave the upper guide supports a specific amount. This is the only right way of doing it. You cannot just go about and slap the springs on. The rear is fine, it has enough travel. -Malek __________________ 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
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09-09-2022, 10:58 AM	#9
TboneS54 YNWA 1043 Rep 813 Posts Drives: 2004 M3 6spd & 2011 M3 DCT Join Date: Nov 2009 Location: SoCal iTrader: (2)	The dampers' shaft being a bit lower wouldn't, but stiffer springs are asking more of the dampers, and that probably wears them out faster. I think it's two-fold, not even so much faster wear, but more noticeable as the stock dampers weren't valved for the rebound that stiffer springs need. The better, but $800 more expensive move, is to pair the springs with bilstein B8s. __________________ /// 2004 Silvergrey M3 · Coupe · 6MT · Slicktop · zero options /// 2011 Jerez/Bamboo E90 M3 · DCT · Slicktop · IG: @na.s54
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09-10-2022, 12:15 PM	#11
nrubenstein Captain 567 Rep 801 Posts Drives: E30 M3/E36 M3/E46 M3/E90 M3 Join Date: Dec 2016 Location: Washington, DC iTrader: (2)	The why not on the rear is because they use a Z4 part in back. __________________ 2011.75 E90 M3 \| 2006 GMC Sierra LBZ \| 2004 X5 3.0i 6MT \| 1995 M3 S50B32 \| 1990 325is \| 1989 M3 S54B32 Hers: 1996 911 Turbo \| 1989 325iX
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