Notices

T-Bar Delete with Roll Center correction and Rod ends. COMPLETE!

 
Old 07-09-2013, 11:40 PM
  #31  
Chris White
Addict
Rennlist Member

Rennlist Small
Business Sponsor

 
Chris White's Avatar
 
Join Date: Jul 2001
Location: Marietta, NY
Posts: 7,396
Likes: 0
Received 0 Likes on 0 Posts
Default

What was you tube center section made from?
Chris White is offline  
Old 07-10-2013, 12:10 AM
  #32  
fast924S
User
 
fast924S's Avatar
 
Join Date: May 2004
Location: CT
Posts: 1,819
Likes: 0
Received 0 Likes on 0 Posts
Default

Wow! That's some serious load... Back to the drawing board
fast924S is offline  
Old 07-10-2013, 12:26 AM
  #33  
JET951
Addict
Rennlist Member
 
JET951's Avatar
 
Join Date: Nov 2005
Location: Sydney Australia
Posts: 2,514
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Chris White View Post
What was you tube center section made from?
...
Attached Images  
JET951 is offline  
Old 07-10-2013, 12:31 AM
  #34  
333pg333
Addict
Rennlist Member
 
333pg333's Avatar
 
Join Date: Feb 2006
Location: Australia
Posts: 18,491
Likes: 0
Received 0 Likes on 0 Posts
Default

Paging Bruce???

Last edited by 333pg333; 07-10-2013 at 01:04 AM.
333pg333 is offline  
Old 07-10-2013, 01:03 AM
  #35  
333pg333
Addict
Rennlist Member
 
333pg333's Avatar
 
Join Date: Feb 2006
Location: Australia
Posts: 18,491
Likes: 0
Received 0 Likes on 0 Posts
Default

Can you give us a bit more background as to what happened? Seems odd that this would just occur. Did you come off the track, hit anything etc...
333pg333 is offline  
Old 07-10-2013, 04:02 AM
  #36  
TonyG
Rennlist Junkie Forever
 
TonyG's Avatar
 
Join Date: Dec 2001
Location: Los Angeles
Posts: 5,976
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by North Coast Cab View Post
Guys, I certainly appreciate all the ingenuity and effort here, but this is a good example of the need for true R&D when tackling a project of this magnitude. My torsion tube bent under the second weekend of racing.
How is it possible for that assembly, which is bolted to each side of the car, to bend like that without the car being hit?

Each side is rigidly bolted to the side of the chassis.

Typically, If the torsion bar carrier (or what ever replaces the stock torsion bar carrier) bend like that, it means that the sides of the car (at least one side) got pushed in (as in contact).

TonyG
TonyG is offline  
Old 07-10-2013, 04:07 AM
  #37  
333pg333
Addict
Rennlist Member
 
333pg333's Avatar
 
Join Date: Feb 2006
Location: Australia
Posts: 18,491
Likes: 0
Received 0 Likes on 0 Posts
Default

Yes, would like more info please. 1 & 1 isn't quite adding up.
333pg333 is offline  
Old 07-10-2013, 08:14 AM
  #38  
North Coast Cab
Addict
Rennlist Member
 
North Coast Cab's Avatar
 
Join Date: Nov 2005
Location: Cleveland
Posts: 957
Likes: 0
Received 0 Likes on 0 Posts
Default

Some comments:
I reached out to Bruce last week.
The car was not hit, did not sustain any additional damage and the car runs very stiff springs. Fairly typical race use with lots of high stress areas, curb riding etc. The stock unit went right back in with no issues.
It appears to me the outer aluminum end, not sure what to call them, pulled away from the upper mount which allowed the unit to flex and then bend.
The stock torsion tube has an additional sweeping brace that mounts to the upper body well.
You will also note that the original picture shows a center brace which was not on my unit. A friend with a Kokeln unit examined it and said his has two center braces that mount to the body and is much beefier.
North Coast Cab is offline  
Old 07-10-2013, 08:37 AM
  #39  
333pg333
Addict
Rennlist Member
 
333pg333's Avatar
 
Join Date: Feb 2006
Location: Australia
Posts: 18,491
Likes: 0
Received 0 Likes on 0 Posts
Default

Have you heard back from Bruce? I think we need to look into this further. Be good to compare all 3 versions.
333pg333 is offline  
Old 07-10-2013, 12:12 PM
  #40  
Chris White
Addict
Rennlist Member

Rennlist Small
Business Sponsor

 
Chris White's Avatar
 
Join Date: Jul 2001
Location: Marietta, NY
Posts: 7,396
Likes: 0
Received 0 Likes on 0 Posts
Default

It looks like the version that bent did not have the tabs that tie into the body stiffening 'bridge' in front of the stock torsion bar carrier (like the version in the beginning to the thread) - that is an important item! Once you go with the solid mounts it is a good idea to tie the main bar in to as many point as possible.
Chris White is offline  
Old 07-10-2013, 12:48 PM
  #41  
JustinL
Super User
 
JustinL's Avatar
 
Join Date: Jan 2002
Location: Edmonton AB
Posts: 2,892
Likes: 0
Received 0 Likes on 0 Posts
Default

Great. Chrenan and I've got expensive decorations for our garages now.
JustinL is offline  
Old 07-10-2013, 12:52 PM
  #42  
reno808
Super User
 
reno808's Avatar
 
Join Date: Mar 2005
Location: In the garage trying to keep boost down
Posts: 8,809
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by JustinL View Post
Great. Chrenan and I've got expensive decorations for our garages now.
I am sorry, but your comment is funny LOL
reno808 is offline  
Old 07-10-2013, 12:58 PM
  #43  
theamsoilguy
User
 
Join Date: Jul 2012
Posts: 18
Likes: 0
Received 0 Likes on 0 Posts
Default

Ive got mine from Bruce and have not installed it yet. Lets find out if the bent one is the same as what was just produced. If what is current needs some beefing up, etc. I guess I can take mine out of the box and take a picture tonight of the tabs\bracing that it has.
theamsoilguy is offline  
Old 07-10-2013, 01:00 PM
  #44  
chrenan
Addict
Rennlist Member
 
chrenan's Avatar
 
Join Date: Apr 2005
Location: Canada
Posts: 1,391
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by JustinL View Post
Great. Chrenan and I've got expensive decorations for our garages now.
I'm trying to look at this from a more "glass half full" perspective.

We waited nearly a year after payment to receive the parts, that delay meant I couldn't install the parts last winter, and since its track season now I was holding off doing the install until this coming winter.

This is a positive for three reasons. One, I didn't experience that failure as the part is collecting dust in my garage. Two, I'll never experience that failure because I won't risk running this torsion bar delete now until I hear from Bruce. Three, the torsion bar delete is in mint condition so I'll get top dollar for it at the scrap yard if that is the only thing I can do with it. I should be able to make pennies back on the dollar!

All I can say is thank-you North Coast Cab for posting the pictures. Please keep us posted on any updates.
chrenan is offline  
Old 07-10-2013, 01:05 PM
  #45  
Eric_k
Addict
Rennlist Member
 
Eric_k's Avatar
 
Join Date: Dec 2002
Location: Woodinville, WA
Posts: 392
Likes: 0
Received 0 Likes on 0 Posts
Default

Eow! I have 3 race weekends on mine and no bending...yet. Mine looks to be the same version as North Coast Cab's. I have 6 races this weekend to see how it holds up.

I'm trying to get my head around how it could bend like that. Possibly hitting a curb or hole with the suspension already fully compressed to the point of coil bind?

Originally Posted by North Coast Cab View Post
It appears to me the outer aluminum end, not sure what to call them, pulled away from the upper mount which allowed the unit to flex and then bend.
Are you saying the bolt on the upper torsion bar carrier mount came loose allowing the bend? What came first the bend or freedom of the upper mount? I assume all the mounting points had been switched to solid mounts.

Of note, when I put mine on I made point of not changing anything; spring rates, alignment settings, etc. The car understeered significantly more which tells me the rear grip went up. The lap times went down too.
Eric_k is offline  

Thread Tools
Search this Thread
Quick Reply: T-Bar Delete with Roll Center correction and Rod ends. COMPLETE!


Contact Us - About Us - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: