Intrax suspension failure - Page 4

The Gorilla · 03-07-2009, 01:36 PM

Hi,

Having read this thread I can't believe that
anybody is running rear coilovers and are not using
the Z3 Rear Turret stiffeners.

They cost about 22.00 pounds for the pair,
and are available from the dealer.

Strange how guys running 600.00 Gaz or Leda
suspension on their E30's use them, yet guys
running CSL's with 2k plus of Intrax do not make
the small Investment.

Even stranger that the suspension selling dealer does not even
recommend them in the first place, and yet knows all
about suspension, most strange.

A cage only resolves the problem if fitted
with top plates, which most of the E46 ones
I have ever seen welded in do not, they are
more often welded to the side of the rear turret
for cross bracing and stiffness.

The coilovers punch through, due to the
suspension drop slowly weaking the metal as the
all the force it taken by the nuts on top
during drop, which after time stresses the
shell metal to the point, that once fatigued,
then on rebound, they will eventually punch
through.

Regards,

The Gorilla.

**shimmy** · 03-07-2009, 09:56 PM

2 x Z3 Reinforcement Plates (Part Number 51-71-8-413-35) ???

kbird · 04-07-2009, 12:22 AM

What is the part number please?

kbird · 04-07-2009, 09:13 AM

Quote:

Originally Posted by The Gorilla

Hi,

Having read this thread I can't believe that
anybody is running rear coilovers and are not using
the Z3 Rear Turret stiffeners.

They cost about 22.00 pounds for the pair,
and are available from the dealer.

Strange how guys running 600.00 Gaz or Leda
suspension on their E30's use them, yet guys
running CSL's with 2k plus of Intrax do not make
the small Investment.

Even stranger that the suspension selling dealer does not even
recommend them in the first place, and yet knows all
about suspension, most strange.

A cage only resolves the problem if fitted
with top plates, which most of the E46 ones
I have ever seen welded in do not, they are
more often welded to the side of the rear turret
for cross bracing and stiffness.

The coilovers punch through, due to the
suspension drop slowly weaking the metal as the
all the force it taken by the nuts on top
during drop, which after time stresses the
shell metal to the point, that once fatigued,
then on rebound, they will eventually punch
through.

Regards,

The Gorilla.

Is this the part number 33 52 1 137 972?

**shimmy** · 04-07-2009, 10:15 AM

http://home.comcast.net/~matthew.c.s...ount/index.htm

found this!

azrael · 04-07-2009, 10:49 AM

Quote:

Originally Posted by shimmy

http://home.comcast.net/~matthew.c.s...ount/index.htm

found this!

Sounds like these are a must! if only a minimum

kbird · 04-07-2009, 10:58 AM

Quote:

Originally Posted by shimmy

http://home.comcast.net/~matthew.c.s...ount/index.htm

found this!

Nice work Shimmy!! Parts ordered, here on Tuesday so I can get them fitted for my Ring/Spa trip this weekend! Cheers

**glendog74** · 04-07-2009, 11:07 AM

http://www.turnermotorsport.com/html...6&subcat_id=96

http://www.rogueengineering.com/Merc...&Category_Code

azrael · 09-07-2009, 03:12 PM

So whats the general concensus on this then. I've got intrax and turner bush limiter kit. Seems to be a few different options with plates...?

The Gorilla · 09-07-2009, 05:49 PM

Hi,

A good rear strut brace will also do the same
job as the Z3 reinforcement Rings.

The rear Intrax coilovers on my car are on Hangers,
which are used to run shorter rear springs.

Cage is welded to the side of the turrets, although
if I has specified it, I would have picked up the
rear turret top mount and spread the point load out
away, into the shell and the cage.

Shorter rear spring for Track work is better, although much
harsher and skittish on the road though.

E30 M3 DTM 92 cars ran hangers as well on the rears
for a shorter rear spring, so its not a new idea.

Regards,

The Gorilla.

04-07-2009, 11:07 AM	#38
glendog74 CSL Register Uber-poster! Tetris Champion! Join Date: Apr 2008 Location: Cornwall Posts: 8,861 Casino cash: $32299	http://www.turnermotorsport.com/html...6&subcat_id=96 http://www.rogueengineering.com/Merc...&Category_Code __________________ Cha'mone Mother F**ker!

03-07-2009, 01:36 PM	#31
The Gorilla S5, Sport Off, DSC M-track Join Date: Apr 2008 Posts: 740 Casino cash: $14401	Hi, Having read this thread I can't believe that anybody is running rear coilovers and are not using the Z3 Rear Turret stiffeners. They cost about 22.00 pounds for the pair, and are available from the dealer. Strange how guys running 600.00 Gaz or Leda suspension on their E30's use them, yet guys running CSL's with 2k plus of Intrax do not make the small Investment. Even stranger that the suspension selling dealer does not even recommend them in the first place, and yet knows all about suspension, most strange. A cage only resolves the problem if fitted with top plates, which most of the E46 ones I have ever seen welded in do not, they are more often welded to the side of the rear turret for cross bracing and stiffness. The coilovers punch through, due to the suspension drop slowly weaking the metal as the all the force it taken by the nuts on top during drop, which after time stresses the shell metal to the point, that once fatigued, then on rebound, they will eventually punch through. Regards, The Gorilla.

03-07-2009, 09:56 PM	#32
shimmy CSL Register Uber-poster! Join Date: Apr 2008 Location: Uk Posts: 14,646 Casino cash: $43909	2 x Z3 Reinforcement Plates (Part Number 51-71-8-413-35) ???

04-07-2009, 12:22 AM	#33
kbird S3 - On the open road Join Date: Nov 2008 Location: Somerset Posts: 96 Casino cash: $2926	What is the part number please?

04-07-2009, 10:15 AM	#35
shimmy CSL Register Uber-poster! Join Date: Apr 2008 Location: Uk Posts: 14,646 Casino cash: $43909	http://home.comcast.net/~matthew.c.s...ount/index.htm found this!

09-07-2009, 03:12 PM	#39
azrael S5, Sport On, DSC M-track Join Date: Sep 2007 Location: Portsmouth/Reading Posts: 1,292 Casino cash: $9290	So whats the general concensus on this then. I've got intrax and turner bush limiter kit. Seems to be a few different options with plates...?

09-07-2009, 05:49 PM	#40
The Gorilla S5, Sport Off, DSC M-track Join Date: Apr 2008 Posts: 740 Casino cash: $14401	Hi, A good rear strut brace will also do the same job as the Z3 reinforcement Rings. The rear Intrax coilovers on my car are on Hangers, which are used to run shorter rear springs. Cage is welded to the side of the turrets, although if I has specified it, I would have picked up the rear turret top mount and spread the point load out away, into the shell and the cage. Shorter rear spring for Track work is better, although much harsher and skittish on the road though. E30 M3 DTM 92 cars ran hangers as well on the rears for a shorter rear spring, so its not a new idea. Regards, The Gorilla.