Anything and everything GT6.

Suspension and steering.

After recieving a super rear anti-roll bar for xmas for my GT6 MkIII Rotoflex does anyone out here know how I might fit it ?
It is a Triumphtune bar designed for rotoflex cars and comes with instructions (directive 903) that make absolutly no-sense to me even
the pictures are totally confusing. It is completely different to the one installed on my spitfire which was the triumphtune development car.
would anyone out here have a similar set up or know of a website
that might have pictures.
Many thanks Neil

Hi Neil,

Can you let us know which one it is you have - I have come across two different types in my time and both are TriumphTune.

The basic differences I know of are one has a straight centre section and mounts on the boot floor, the other is formed in the centre section and bolts onto the chassis.

Any pictures would help lots...
NiG

The bar is definately formed but i have no idea how it would fit to the chassis as the arms at either end would not be able to clear the rotoflexes.
I dont have access to a camera just yet but the bar is something like this.
___________
__________/ \_________
/ \
/ \
/ \
o o

many thanks for your help, Neil

Hmmm - now I'm even more in the dark

NiG

Neil,
Your diagaram didn't come through in the post, but I fiited a TT ARB to my rotaflex Vitesse. Here's the instruction diagram - not that helpful, but does it look at all like yours?
John
PS My copy is a photocopy, with the bottom edge of the diagram cut off - wonderful, isn't it?

thanks for the replies and thanks to craig for sorting out the picture (I wondered what went wrong). the first bar I recieved from TT was similar to the one fitted to john davies vitesse but with the long verticle bolt end fitting. this was duly exchanged for the presumably correct one (by the way very prompt sympathetic service from moss london who exchanged the bar even though I had it painted for fitting and lost a bush from the bar ends)
the bar now sounds exactly as described by david thompson, and the instructions say it should be fitted facing backwards but there is nothing to fit it to. the chassis rails are too close and the rear seat panel too high to be able to mount the bracket.
I recieved an e-mail from simon horsfal who directed me to some pictures of his set up which I have included here. If this is wrong (publishing someone elses pictures please let me know)
the bar seems identical to this one but surely you should not have to fabricate such large spacers to get it to reach the boot floor. If i does need such large spacers then why hay a formed bar as it could be left straight such as my spitfire one.
anyway many thanks to those on this list any more comments / suggestions/ ideas are greatly apprieciated. Neil

Neil,
You're quite right - mine was originally fitted in front of the rear axle. When I converted to Rotaflex, I fitted it behind, to clear the radius arms. The details don't matter as the ARB you have now is a different pattern.

However, a couple of things worry me about the setup in the picture. There appears to be a bracket welded onto the wishbone, about halfway along, for the ARB vertical link. This bracket looks far too flimsy, as an ARB should be linked as stiffly as possible tot the axle. And the link looks to be right next to the Rotaflex coupling - will it clear?

The picture may be of a mockup in the design stage. but the spacer/bracket on the boot floor looks to be of wood!
I think the reason why this is needed is that the ARB supplied by TT/Moss is a generic one from the USA that 'fits' the late US model Spitfire. That has Herald/Vitesse style chassis extensions where a UK Spitfire/GT6 has towing eyes. Instead of the spacer, a space frame welded on here will position your ARB better and lighter than the large spacers. Anyway, the boot floor is far too flexible to be a mounting for an ARB.

Lastly, the vertical link has FAR too thick rubber bushes on it! The ARB will wave about in the wind! Find thin polyurethane bushes, or consider using spherical bearings("Rose" joints) here. I used a Rose joint, via a small bracket on the lower shock absorber mount stud with my original reversed ARB. The clearance from the wheel rim was very small indeed, but it cleared!
John

Sorry about that. HTML supresses additional spaces. Here's what Neil was trying to show you -

The bar I got from TT is different to the one shown by John Davies in that the flat drilled ends of the bar that attach to the suspension are at 90 degrees to that shown in the diagram i.e. the flat portion at the end of the bar is horizontal and the drilled hole is vertical.

If the bar is this type it goes across the chassis infront of the rear suspension. The two ends of the bar are therefore facing backwards. A flat plate is attached to the lower wishbone (you have to drill a hole) and a long bolt with several bushes and cups then bolts to this, the flattened end portion of the anti roll bar being attached to this. This results in the ends of the anti-roll bar being extremely low which seriously compromises ground clearance.

There was a photo of a red GT6 MKIII in Practical Classics about a year ago with one of these fitted this way.

Hope that helps

Section : Suspension

Rotoflex rear anti roll bar

Followups :

Rotoflex rear anti roll bar

Rotoflex rear anti roll bar

Rotoflex rear anti roll bar

Rotoflex rear anti roll bar

Rotoflex rear anti roll bar

Rotoflex rear anti roll bar

Rotoflex rear anti roll bar

Rotoflex rear anti roll bar