Help with GC RSM install?

MFGJR · 11-26-2011, 09:02 AM

I'm in the middle of installing Ground Control rear shock mounts, and the instructions vs. what they supplied are confusing...

The RSMs each come with two new, thick washers, yet I interpret the instructions (covering E30/36/46, but nothing specific to E85/86) as saying for E36/46 to use the stock, thin upper [corrected] washer and the new, thick washer on the bottom [corrected]. Using even the one thick washers doesn't leave much thread showing once the nut is intalled on top of the shock and tightened so that the bushing is bulged just a smidge.

For those who've installed these, what washer combination did you use? Did you tighten so that the bushing bulges just a bit? And, did you nstall the bushings in the "street" indent-out orientation, or the "race" indent-in way?

Thanks!

Caddyshk · 11-26-2011, 12:17 PM

IIRC I didn't use any OE hardware. WRT the orientation, I believe there was only one direction they snugged properly. inTgr8r will pop on shortly to better explain.

inTgr8r · 11-26-2011, 12:20 PM

Are these the washers you're referring to?

inTgr8r · 11-26-2011, 12:21 PM

You don't use any OE hardware at all.
Use the 2 supplied washers.

"did you nstall the bushings in the "street" indent-out orientation, or the "race" indent-in way?"
1st I've heard of this.
We installed ours lobes out.
It seamed the way that they fit best.
A little of the wheel well liner had to be trimmed.

inTgr8r · 11-26-2011, 12:28 PM

there should be LOTS of thread sticking out when tightened.

↓

MFGJR · 11-26-2011, 03:22 PM

Quote:

Originally Posted by inTgr8r

Are these the washers you're referring to?

Pics don't seem to be working....

Quote:

Originally Posted by inTgr8r

You don't use any OE hardware at all.
Use the 2 supplied washers.

"did you nstall the bushings in the "street" indent-out orientation, or the "race" indent-in way?"
1st I've heard of this.
We installed ours lobes out.
It seamed the way that they fit best.
A little of the wheel well liner had to be trimmed.

Quote:

Originally Posted by Caddyshk

IIRC I didn't use any OE hardware. WRT the orientation, I believe there was only one direction they snugged properly. inTgr8r will pop on shortly to better explain.

Quote:

Originally Posted by inTgr8r

there should be LOTS of thread sticking out when tightened.

No pic again...

In my haste this morning, I neglected to mention that these are the 10mm bushing inserts, and are going on the OE shocks (for now). So, probably different from what's supplied with coil-overs. Here's a pic of the instructions where they say to use the OE washer up top.

The arrow indicates the indent in the bushing--they sit more into the housing whenoriented "in", making for a shorter (and, I guess, less compliant) bushing. Alternatively, they sit more out of the housing the other way around, allowing more compliance. I went with "in' and it's fine--quiet and not harsh. Definitely only one-two threads visible above the nuts at the point the urethane starts to compress, but again this is the OE shock.

Good news is, if I did it wroing, or if I want to change it, it's a WHOLE lot easier now that I don't have to remove the trunk liner!

Thanks for the input. Any new/updated thoughts?

Caddyshk · 11-26-2011, 03:55 PM

OT - What's the story on the M Power Intake cover?

Thanks

MFGJR · 11-26-2011, 05:04 PM

Quote:

Originally Posted by Caddyshk

OT - What's the story on the M Power Intake cover?

That decal adds 10mph on the top end! Came from http://www.europeanplates.com/, but seems to be unavailable now.

Caddyshk · 11-26-2011, 05:44 PM

Quote:

Originally Posted by MFGJR

That decal adds 10mph on the top end! Came from http://www.europeanplates.com/, but seems to be unavailable now.

Was hoping for 15hp

Thanks!

MFGJR · 11-26-2011, 06:16 PM

Quote:

Originally Posted by Caddyshk

Was hoping for 15hp

Thanks!

Well, they had BIGGER decals, too...

Caddyshk · 11-26-2011, 06:36 PM

How did the install go?

MFGJR · 11-26-2011, 07:17 PM

Quote:

Originally Posted by Caddyshk

How did the install go?

Well, you just kind of stick the decal on and rub it...

Oh, you mean the RSMs? I just made an executive decision about which way to put the bushings in ("race") and how tight to squish everything down, and it came out great--see my comments in the 'Anti-Roll Bushing" thread (those went in too) at http://www.zpost.com/forums/showthread.php?t=593943

Caddyshk · 11-26-2011, 07:24 PM

I'm very pleased with the GC setup! Not a daily driver however - 500/600 lb springs... My wife didn't complain however after the 3,000 mile round trek to HC this year... Well, other than spirited driving in the mountains - screaming actually, not complaining

11-26-2011, 09:02 AM	#1
MFGJR First Lieutenant 27 Rep 341 Posts Drives: 2007 Z4 M Coupe Join Date: Sep 2008 Location: Richmond, VA iTrader: (0)	Help with GC RSM install? I'm in the middle of installing Ground Control rear shock mounts, and the instructions vs. what they supplied are confusing... The RSMs each come with two new, thick washers, yet I interpret the instructions (covering E30/36/46, but nothing specific to E85/86) as saying for E36/46 to use the stock, thin upper [corrected] washer and the new, thick washer on the bottom [corrected]. Using even the one thick washers doesn't leave much thread showing once the nut is intalled on top of the shock and tightened so that the bushing is bulged just a smidge. For those who've installed these, what washer combination did you use? Did you tighten so that the bushing bulges just a bit? And, did you nstall the bushings in the "street" indent-out orientation, or the "race" indent-in way? Thanks! Last edited by MFGJR; 11-26-2011 at 10:29 AM.. Reason: Corrected washer order
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11-26-2011, 12:17 PM	#2
Caddyshk M = Midlife Crisis 66 Rep 2,006 Posts Drives: 2006 Z4MC Interlagos Join Date: May 2007 Location: Fort Erie, Ontario, Canada iTrader: (0)	IIRC I didn't use any OE hardware. WRT the orientation, I believe there was only one direction they snugged properly. inTgr8r will pop on shortly to better explain. __________________ 2006 Z4MC - #LL93158 SS Race Cans, RE X Pipe, DKF Sec 1, Fabspeed Headers, OE STB, AS Shifter, Dave Z CDV, GC Coil Overs, Stoptech lines, Hawk DTC Pads, RE Clutch Stop, RE Transmission Mounts, Vibra-Technics Engine Mounts, Poly FCAB & RTAB, LeatherZ M Shift Boot, Tekarbon Rear Spoiler, CF Grills, Advan RS DGM
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11-26-2011, 12:20 PM	#3
inTgr8r Lieutenant General 2435 Rep 11,669 Posts Drives: M2 Comp Join Date: Mar 2006 Location: Toronto iTrader: (10)	Are these the washers you're referring to? __________________ '21 M2C Hockenheim Silver '18 718 Cayman S Lava Orange (sold) '13 E92 M3 Santorini Blue (sold) '07 Z4 M Coupe Alpine White (sold)
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11-26-2011, 12:21 PM	#4
inTgr8r Lieutenant General 2435 Rep 11,669 Posts Drives: M2 Comp Join Date: Mar 2006 Location: Toronto iTrader: (10)	You don't use any OE hardware at all. Use the 2 supplied washers. "did you nstall the bushings in the "street" indent-out orientation, or the "race" indent-in way?" 1st I've heard of this. We installed ours lobes out. It seamed the way that they fit best. A little of the wheel well liner had to be trimmed. __________________ '21 M2C Hockenheim Silver '18 718 Cayman S Lava Orange (sold) '13 E92 M3 Santorini Blue (sold) '07 Z4 M Coupe Alpine White (sold)
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11-26-2011, 12:28 PM	#5
inTgr8r Lieutenant General 2435 Rep 11,669 Posts Drives: M2 Comp Join Date: Mar 2006 Location: Toronto iTrader: (10)	there should be LOTS of thread sticking out when tightened. ↓ __________________ '21 M2C Hockenheim Silver '18 718 Cayman S Lava Orange (sold) '13 E92 M3 Santorini Blue (sold) '07 Z4 M Coupe Alpine White (sold)
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11-26-2011, 03:55 PM	#7
Caddyshk M = Midlife Crisis 66 Rep 2,006 Posts Drives: 2006 Z4MC Interlagos Join Date: May 2007 Location: Fort Erie, Ontario, Canada iTrader: (0)	OT - What's the story on the M Power Intake cover? Thanks __________________ 2006 Z4MC - #LL93158 SS Race Cans, RE X Pipe, DKF Sec 1, Fabspeed Headers, OE STB, AS Shifter, Dave Z CDV, GC Coil Overs, Stoptech lines, Hawk DTC Pads, RE Clutch Stop, RE Transmission Mounts, Vibra-Technics Engine Mounts, Poly FCAB & RTAB, LeatherZ M Shift Boot, Tekarbon Rear Spoiler, CF Grills, Advan RS DGM
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11-26-2011, 06:36 PM	#11
Caddyshk M = Midlife Crisis 66 Rep 2,006 Posts Drives: 2006 Z4MC Interlagos Join Date: May 2007 Location: Fort Erie, Ontario, Canada iTrader: (0)	How did the install go? __________________ 2006 Z4MC - #LL93158 SS Race Cans, RE X Pipe, DKF Sec 1, Fabspeed Headers, OE STB, AS Shifter, Dave Z CDV, GC Coil Overs, Stoptech lines, Hawk DTC Pads, RE Clutch Stop, RE Transmission Mounts, Vibra-Technics Engine Mounts, Poly FCAB & RTAB, LeatherZ M Shift Boot, Tekarbon Rear Spoiler, CF Grills, Advan RS DGM
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11-26-2011, 07:24 PM	#13
Caddyshk M = Midlife Crisis 66 Rep 2,006 Posts Drives: 2006 Z4MC Interlagos Join Date: May 2007 Location: Fort Erie, Ontario, Canada iTrader: (0)	I'm very pleased with the GC setup! Not a daily driver however - 500/600 lb springs... My wife didn't complain however after the 3,000 mile round trek to HC this year... Well, other than spirited driving in the mountains - screaming actually, not complaining __________________ 2006 Z4MC - #LL93158 SS Race Cans, RE X Pipe, DKF Sec 1, Fabspeed Headers, OE STB, AS Shifter, Dave Z CDV, GC Coil Overs, Stoptech lines, Hawk DTC Pads, RE Clutch Stop, RE Transmission Mounts, Vibra-Technics Engine Mounts, Poly FCAB & RTAB, LeatherZ M Shift Boot, Tekarbon Rear Spoiler, CF Grills, Advan RS DGM
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