[Roadsters] brake part interchangeability question

[Gary and Cindy Ault]

Craig,

Most brake parts are interchangeable across all years.  The caliper
pistons 
never changed.  The early cars had 13/16-inch rear wheel cylinders,
while the 
'67-1/2 and later had 3/4-inch cylinders.  I have heard one can put
3/4-inch 
rear cylinders on earlier cars, but you won't get as much rear brake
force.  (I 
believe the threads in the 3/4-inch cylinders' bleeder screws and
brake 
lines are SAE.)  I would not do it, mostly because I don't know how
significant 
the effect would be.

Although dual-circuits, with a dual-piston
master cylinder and brake 
propostioning valve, were introduced with the
'67-1/2s, I think the brake 
pressure proportioning systems changed with later
cars.  The brake proportioning 
system will not be a factor for work at the
wheels.

Other than that, for the parts you are talking about replacing,
everything is 
the same, including the fitting on the brake lines.

Gary
To: datsun-roadsters at autox.team.net
Sent: Sun, August
21, 2011 7:49:30 AM
Subject: [Roadsters] brake part interchangeability
question

I have caliper kits, rear wheel cylinders, pads, shoes for my 69
2000 but have 
to change car's I'm trying to get ready to go to the Glen...can
I use these on a 
66 1600 or are the threads different? I don't remember where
the change came in 
between standard and metric and when the size of the
caliper pistons 
changed...guy who was supposed to be getting the body ready
for paint on the 
2000 came over a couple weeks ago and cut the LR quarter out
and then never came 
back....gotta have a driver for the Glen! nothing like
starting with a car that 
hasn't been run in around 15 years, needs paint, no
interior, needs tires and 
wheels, brakes and chrome....2 weeks before we're
supposed to be leaving for the 
event 8-) 

Thanks, 
Craig
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