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Dec 7, 2006 | 09:54 AM

#21

Twin_Turbo

Race Director

Joined: Dec 1999

Posts: 16,945

Likes: 9

Quote:

Originally Posted by 427SIXPACK

COOL ........how did you do that ?

SolidWorks 2007

Dec 7, 2006 | 04:22 PM

#22

Mark_Milner

Safety Car

Joined: Feb 2006

Posts: 4,367

Likes: 59

From: FL

Quote:

Originally Posted by 73C34me

For the posted examples; it looks like the rear down tubes are going to the differential crossmember instead of the frame rail in the area of the shock mount. is this correct? thanx

There are two crossmembers by the rear end. One mounts the differential, the other ties the frame together. Use the one in back that ties the frame. The one the differential mounts on is a soft mount from the factory and often uses hard mounts in a race car.

A good idea is to remove the differential mount to save weight and fabricate a bracket from the frame crossmember to support the differential. It also improves access for work.

Dec 7, 2006 | 04:37 PM

#23

Yellow73SB

Le Mans Master

Joined: Nov 2004

Posts: 6,434

Likes: 0

St. Jude Donor '07

Quote:

Originally Posted by 84rzv500r

Because I complained about the fit and they said send "us drawings of what you need" and they bent it and sent it to my specs for VERY little money.

I have the pinion pieces and a main hoop diagonal and all of the X bracing...

Do you have copies of those drawlings?

Dec 7, 2006 | 08:55 PM

#24

84rzv500r

Drifting

Joined: Oct 2003

Posts: 1,486

Likes: 10

From: Big Pine Key FL

Quote:

Originally Posted by Yellow73SB

Do you have copies of those drawlings?

Yes

Dec 7, 2006 | 09:46 PM

#25

73C34me

Burning Brakes

Joined: Jun 2005

Posts: 1,129

Likes: 106

From: laingsburg MI

2020 C3 of the Year Finalist - Modified

I have not thought about making a bracket to hang the diff. from the frame cross member, might be good. but 2 weeks ago I boxed the fixed cross weld on brackets (diff. cross member mounts to these) r to the frame rails so that it cannot twist free under power.(not sure if this is a clear expl.)

Dec 10, 2006 | 02:00 AM

#26

Mark_Milner

Safety Car

Joined: Feb 2006

Posts: 4,367

Likes: 59

From: FL

Quote:

Originally Posted by 73C34me

The problem is not so much the mounting cups, but the rubber cups in the crossmember. Most race cars have the mounting cups gussetted to the frame to stiffen. But you have to get rid of the rubber.

and after you do that, you still have about 30 lbs of steel that duplicates the croassmember that sits 6 inches further back.