>From: Paul Burr <tigerpb@ids.net>
>Reply-To: Paul Burr <tigerpb@ids.net>
>To: triumphs@autox.team.net
>Subject: Re: roll bar reinforcement
>Date: Thu, 6 Dec 2001 09:32:09 -0500
>
>I have a roll bar that came with my Tr6. Since it only attaches to the
>floor pan sheet metal, it would be next to worthless in a rollover.I'd
>think that a racer would have to tie it into the frame for it to have
>any benefit.
>
>Paul
> >> What are peoples thoughts? What do you racers do to make rollbars more
> >> than cosmetic?
> >
> > Larger backing plates?
>
These roll bars can only be good for cosmetic purposes.
I have a custom roll bar that bolts to the floor in front of rear
wheel arches of my TR4. It is braced at the top of the wheel arches
then diagonally braced from the top left to the bottom right of
the rollbar frame. It is further braced horizontally behind the
drivers seat.
It's strength derives from the front plates being bolted directly
over the front pick-up point of the rear leaf spring. Despite this,
I would consider my roll bar only a bit better, as it isn't directly
attached to the frame. Were I to race the car, at minimum, I would
want a brace from the top of the bar to the frame at the front of
the cockpit. To feel really secure I would want a braced hoop behind
the dash... Of course, this isn't practical for a street application.
What I have is good enough for the occasional autocrossing that I do.
I got lucky when I had my `bar made. I paid $175. It was made with
SCCA regulation tube steel by a racing team mechanic in the off
season and came painted the same color as my car's body.
My advice is if you want serious protection spend the money and have
the job done right.
Greg Petrolati
Greg Petrolati Champaign, Illinois 1962 TR4 (CT4852L)
That's not a leak... My car's just marking its territory...
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