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Motorsports & Track Forum
From Auto-X to Trackday to Racing and Professional Motorsports this is the place to discuss making BMWs fast

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Old 06-05-2012, 07:08 AM   #41
Feffman
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Great build thread. I think you should have dropped the balast plates, installing a seat for "the mascot" and use him as balast.

Feff
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Old 06-05-2012, 10:52 AM   #42
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Quote:
Originally Posted by Feffman View Post
Great build thread. I think you should have dropped the balast plates, installing a seat for "the mascot" and use him as balast.

Feff
Haha great idea!!

Quote:
Originally Posted by The Gorilla View Post
Hi,

Could not see any works to the rear subframe
location fixing/ points during the Cage Install ?

Once you start increasing the load paths
with greater Mechanical grip and the lateral
G forces rise due to Type R or Slick rubber
then you will be ripping out the rear subframe
on a Caged car.

Its a lot easier to strengthen than repair.
Believe me.

Regards,

The Gorilla.
If you look closely at the picture of the trunk area you can see that we installed the subframe reinforcement kit. I chose not to tie the cage into the subframe because A) I have a feeling the subframe reinforcement kit is going to be enough. B) If its not enough, and the plates begin to stress and crack, It is easy to run a couple of reinforcement bars down from the cage.
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Old 06-05-2012, 06:21 PM   #43
ImSoFreaknWhite
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Wow subscribed for sure
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Old 06-06-2012, 04:33 AM   #44
The Gorilla
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Hi,

The Floor Reinforcement Kit is good
for a Road car, but a Caged Track / Race Car
pulling higher lateral G will start a 'sawing' motion
around the bushes and causing 'tears' in a very
short time.

You will more and likely see tears as you have
strengthned the locating bush pick ups.

Its the Torque steer from the diff that causes
diff cradle / rear subframe, to pull/push on the bushes.

Several fully Caged Track cars here in the UK have
all suffered with this issue.

Just trying to help.

Regards,

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Old 06-10-2012, 11:21 AM   #45
Tarmac_E46_M3
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You're saying all this, but not really giving the fix for it.

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Old 06-11-2012, 04:02 PM   #46
The Gorilla
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Hi,

Quote '' You're saying all this, but not really giving the fix for it.''

I have already stated that it should be tied into
the Roll Cage, ie] the roll Cage needs to pick up
the rear subframe Mounts from above.

Just like all BMW built Race cars with Weld in
Cages from the E30 onwards.

How you fabricate that is up to you or your fabricator,
but std Cars are ripping the rear subframe out
the boot floor due to the honey combe construction.

Epoxy injection is assisting on Road Cars in that
it fills the ''void'' but its not really a suitable
fix for a Track Car with full Cage.

Regards,

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Old 02-09-2013, 01:46 PM   #47
dxi_3
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Just stumbled on this thread. Great build! No more updates?
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Old 02-12-2013, 07:02 AM   #48
Ecko
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^Agreed!
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Old 03-04-2013, 07:44 AM   #49
steve bettencourt
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Hi nice build ,was your car stock if not are you going to sell the parts you removed
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Old 04-14-2013, 08:56 PM   #50
bssofro
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Great build.
What shifter is that?

Also you cleaned up the wiring very nicely.
Any pointers on how to do that?

Thx
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