TR6 "Sub" frame connectors for TR6?

[Tosh]

Hi fellow Triumphists,

Would like to pick yer brains on a subject I've been thinkin' bout for a while.

Am on my second driver school Mustang GT. The only reason for mentioning that is 'cause when you buy a Fox body Mustang the first thing you do, if you are smart, is to install subframe connectors to control body flex. These are roughly 2" X 3/4" X 36" rectangular tubing pieces which are welded to the frame rails of the unibody to add stiffness.

Ok. Has anyone (racers) addressed this issue with our flexible flyer body over frame TR6's? To wit, where would such pieces be attached? Would they be worthwhile? Etc. etc. etc.
Ideas and observations appreciated.

 

[swift6]

Most racers stiffen the chassis by linking the roll cage to sections of the chassis. Ideas like the subframe connectors would be an interesting idea to help stiffen up street cars without roll cages.

 

[PeterK]

Good question. From what I hear from road racers, that a well designed roll cage welded to the frame can do wonders for torsional rigidity. Usually a 6 point cage is welded in back of the fuel tank (replaced with a trunk mounted fuel cell), two points at the b-post chassis mounts and two at plates weldede around the forward chassis mounts. Probaby not too convenient for a road car though. For sheer strength of the chassis weak points, there are many gussets that can be added to the chassis but these don't add TR or reduce flex.

 

[Ab Crevoiserat]

I think you may have a good idea. You might try contacting Tony Vigliotti at RATCO. They are sponsors of this forum and he is an expert on TR6 frames. He would be the guy to talk to. https://www.rat-co.com

 

[Guest]

[ QUOTE ]
These are roughly 2" X 3/4" X 36" rectangular tubing pieces which are welded to the frame rails of the unibody to add stiffness.



[/ QUOTE ]

That is weird. I sat up last night daydreaming about the very same thing, using the very same rectangular (or oval) bars. I thought about running diagonals from the T-shirt area anterior to the front outer frame and then Tee-ing back to the corner where the outer pivot for the swing axle makes a right angle, bisecting this angle with a stiffening plate at the end of the brace. Would add about 20lbs but all low-slung weight.

I think everyone on this forum thinks alike sometimes.
Even MG people, albeit it on a different plane.


Bill

 

[LastDeadLast]

Tosh,

I agree with you. In installed them on my 2000 GT (Mustang) and they did wonders for the stiffness of the car. As for a TR6, it definitely couldn't hurt, you can see the cowl shake on a good road bump. Anyone who puts one of these cars on four jack stands knows about chassis flex because you can barely open and shut the doors!

I would be very interested in this, please keep the board updated.

 

[Banjo]

The Triumph race preperation manual shows welding "skid plates" over the big diamond shaped openings between the frame members. This really makes it hard to get at brake lines and stuff like that, but it supposedly does wonders for rigidity. And without an obvious roll bar (unless your gonna put one in anyway)

 

[Simon TR4a]

Alan Myers is an expert on this topic, (and many others!), and has posted previously some very detailed information.
Another good reference source is a backissue of Grassroots Motorsports, I forget which one, which covered the topic, mostly showing triangular gussets used to reinforce junctions in the frame.
Simon.

 

[Tosh]

You guys are awesome!
Will have to do some crawlin' and measurin'.
If I arrive anywhere worthwhile will advise.
Best.