[Fot] Brake Master Cylinders for Race Spitfire.

[chasgee at aol.com]

Glen,
 
I run a system exactly like you describe, but with a Tilton balance bar and remote calbe adjuster.  The master I use for the front cylinder is slightly taller than the one used for the rear, but I don't think that is really necessary.  I use the larger GT6 calipers as well and haven't had issues with fluid capacity.  Pictures can be found in Kas's books.
 
I would recommend that you get the Tilton balance bar and use it with your existing two cylinders rather than the proportioning valve.  Much better for brake balance in all situations.  The proportioning valve just reduces  system pressure to the back, but doesn't alter the front pressure.  With a balance bar, you increase one while reducing the other with almost inifinite adjustment.  Sometimes you want less pressure at the front, too.
 
Just my $0.02,
 
Chuck Gee
Spitfire Racer
Blacksmith Racing
 
 
-----Original Message-----
From: gaf3 at charter.net
To: fot at autox.team.net
Sent: Mon, 15 Jan 2007 2:49 PM
Subject: [Fot] Brake Master Cylinders for Race Spitfire.


I have been running brake line for my 72 Spitfire race car and I need to 
ask the group a couple of questions.
Oh by the way I am making both inverted and iso flares for the project.

I bought this car as a basket case from the previous owner, who had 
raced it in the late 70's and he had some nice work done on the rollbar 
and tub. He has fabricate a dual brake master cylinder setup from two 
5/8" clutch master's with a threaded rod in between the pushrods as a 
makeshift balance bar.

My question is has  anyone ever ran a setup like this before?
If so was there any issue with fluid capacity  for the primary circuit 
with front disc brakes using the clutch master?
How well does the balance bar work over an adjustable proportioning valve?

I had plans to use the production master with a wildwood proportioning 
valve, but I have clearance issues with the plenum. The plenum has been 
replaced with a nicely done flat piece of aluminum.

Any suggestions would be greatly appreciated.

Thanks

Glenn Franco
70's Spit racer under construction
76 Spit
3 TR6's
TR250
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