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RE: robbins top 70 spit

To: <KHOCO@aol.com>, <triumphs@autox.team.net>, <spitfires@autox.team.net>
Subject: RE: robbins top 70 spit
From: "Michael Burdick" <burdick@abacus.mc.duke.edu>
Date: Wed, 25 Aug 1999 16:23:30 -0400
> Listers
>          I just got my new top. This is my first ragtop. Theres no
> instructions with the top. Hints, Tips, and instructions
> greatfully accepted.

Ken,

I just put one on my '70 Spit.  It is the 4th or 5th top I've installed, and
I've found I get better every time.  If you've never done it before and you
are after perfection or close to it, take it to an upholstery shop.  If
you are determined to do it yourself, read on.

Here's what I do.  Keep in mind that I am not a professional, don't
pretend to be one, don't want to be one, don't even know one.  I've
learned by trial and error(S) and by reading.  I start from the back
and work my way forward.

Find the middle point of the rear deck of the car, and the middle
point of the rear edge of the top.  Mark these with tape or chalk.
Install the snaps in the top to match the snaps on the rear deck.
The tension around the rear edge of the top is key - too loose
and the top will flap around, leak, and not line up at the B-posts
- too tight and it will be hard to get the snaps attached and it will
not line up at the B-posts.

Next, install the snaps on the flap at the top of the backlite that
attach to the rear rail.  Again, tension is key (this time tension
along the axis of the car), and so is centering.

Next install the snaps on the flap that attaches to the center rail.  This
flap gets both male and female snaps as it wraps the rail rather than
snapping to it.  Centering is not a problem here since the top
doesn't attach directly to the rail.

Now the fun part:  Find the middle of the front edge of the top, the
windscreen and of the header rail. Mark them all.  Now you are
going to glue the top to the header rail with contact cement.  Coat
the rail and top with cement and let it dry.  Now, bring the top into
contact with the rail keeping in mind centering and proper tension
of the top.  How do you establish proper tension?  Well, that's where
doing it a few times helps.  You want it to be tight enough that its a
little bit hard to get the posts on the header rail to engage their
sockets on the top of the windshield frame when you're done.  The
problem is that excess material can get in the way of this fit test
so you have to kind of eyeball it.  If you get it too tight, the top will
be a bear to get up, and the seams will be overly stressed leading
to premature failure.  Also, if the top shrinks over time, your problems
are magnified.  Too loose and it sags when parked and balloons
up when you're driving.  If you're going to err, I'd err on the side of
too loose.  I've found that if I back the header rail away from the
windscreen and have the top snug but not tight, when the rail is
moved forward towards the windscreen, the tension is pretty
good.  After you've got it glued to the header rail, cut of the
excess material, install the seal channels with pop rivets, and
install the seal.

If everything goes well, that's all there is to it!

Good luck,
Mike Burdick
Durham NC
'70 Spitfire, '72 Stag, '64 TR4


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