Dan and Susan -
I guess I have seen the opposite, which is a proper brace (e.g. Stan's)
provides far more metal gauge, more bearing area and support than the
original sheet metal brace. But, as they say, your mileage may differ.
- Bob
Bamandpeb@aol.com wrote:
>
> Bob:
>
> Actually, what Eric is referring to is a fix for the problem instead of a
> patch. The original problem is that the cowl becomes seperated from the
> factory brace on the inside of the car, and can be reattached and reinforced
> from the inside where it is not noticeable from the engine compartment. This
> continues to use the upper portion of the firewall as a support, instead of
> just the flat portion. With a metal brace added for racing, we watched the
> cowl flex and seperate at the tunnel welds, while rewelding the original
> brace gave the same positive feel, and never recracked. It became a mute
> point when the whole area was cut out to install a set of dual master
> cylinders.
>
> Dan & Susan
>
> << Subj: Re: Firewall support
> Date: 99-09-17 10:03:58 EDT
> From: rwmannco@interport.net (Bob Mann)
> Sender: owner-datsun-roadsters@autox.team.net
> Reply-to: rwmannco@interport.net (Bob Mann)
> To: wittiner@ee.pdx.edu (Eric R. Wittinger)
> CC: stevenh@execpc.com (Steve Harvey), datsun-roadsters@autox.team.net
> (datsun-roadsters@autox.team.net)
>
> Whoa. Perhaps this discussion has lost its focus, but the original
> issue was stopping the car. Brake performance.
>
> The underlying issue isn't the crack, it's the lack of brake feel and
> response due to cowl flex, which degrades as the metal fatigues and
> ultimately fails.
>
> Welding the cowl does very little to solve the underlying problem, which
> is that under heavy application, the cowl simply flexes too much.
>
> - Bob Mann
>
> "Eric R. Wittinger" wrote:
> >
> > I have a question, why go with a support rather then welding up the crack
> > inthe fire wall, with reenfocing the old weldsor the metal onth inside of
> > the car at the same time??(no one sees this area much, unless there is
> > work to be done under the dash. The supports I have sceen just don't look
> > that
> > appealing to me, and for ~$30 you should be able to get it welded??? You
> > have to take out the Master break cylinder anyways??? The same work, the
> > same money(possible, free if you can weld) but origonal looking end
> > result. If it took 30 years for the crack to appear then it should at
> > least last for half that time again. Just some thoughts...
> >
> > Thanks,
> > Eric
>
--
R.W. Mann & Company, Inc. > Airline Industry Analysis and Consulting
Port Washington, NY 11050 > tel 516-944-0900, fax 516-944-7280
mailto:info@RWMann.com > URL http://www.RWMann.com/
|