[DeTomaso] Hall-modified front calipers

[Mike Thomas]

>From your description, I'm afraid "half-modified" means you ended up with
"half brakes".  There are a lot of good used, and even rebuilt, front
calipers showing up on EBay now and then, and I know the vendors either
stock rebuilt calipers, or will do it for you for a reasonable price (Byers
did mine, and they've been great for street use).  Interestingly enough,
they charge more to rebuild the rears than the fronts.

Those jerry-rigged units you have sound like an accident waiting to happen.

Mike Thomas
Yellow 74 L #6328 

-----Original Message-----
From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On
Behalf Of pantdino at aol.com
Sent: Thursday, April 15, 2010 11:58 PM
To: detomaso at realbig.com
Subject: [DeTomaso] Hall-modified front calipers



I have the Hall-modified front calipers. As I recall they said one of the
pistons wasn't even working in the stock caliper and they drilled inside to
activate it. They also took off the connector tubing between the two
outboard pistons and sealed off the lower large input with a bolt.

So there is now only one input connection, which is immediately adjacent to
the upper bleed screw.

When I had the pistons out for rebuilding it occurred to me what a bad
design it is--  the fluid has to dribble down from the input point, cross to
the outboard side, then exit essentially where it enters. Which means that
when you "change" brake fluid you won't be doing that-- it will just shunt
across from input to output point.

Also, I still have a spongy pedal after switching back to non-silicone
fluid.  I suspect there's a bunch of air in those front calipers

I'm thinking of moving the input line to the lower large input point so
fluid will fill from the bottom of the caliper then unbolting the caliper
and holding it at an angle so all the air in the outboard pistons can cross
to the bleed screws on the inboard side.

Anyone else have these calipers?

Jim


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