[Tigers] dual circuit master cylinder options?

[Tom Hall]

On 4/16/2019 6:58 AM, Richard Hyatt via Tigers wrote:
>
> HI,
>
> I wondered if any had converted their tiger to a dual circuit brake 
> master cylinder. If so, which type and year worked well for you. Two 
> issues seem to be plaguing my attempt to do this. I tried using a 1980 
> Datsun 280z master cylinder, This uses a loose rod to actuate it 
> meaning the brake deal must have a stop  or a custom push rod and 
> modification to the master cylinder to keep the rod in place when 
> letting off the brake pedal. The second issue is that I had all custom 
> brake lines made for my conversion to Wilwood disks all around but 2 
> attempts to get correct flare/fitting combination at the new master 
> cylinder have failed. Still have leaks. Not sure if the supplier has 
> used proper flare and fitting despite the info I provided. Any 
> thoughts on a better arrangement? Thanks.
>
> Rick
>
Dear Rick,

I make modified Brake Pedal Kits for Tigers that change the mechanical 
pedal ratio from the factory 4.4:1 to 6:1.  This is change is 
approximately what the Girling vacuum booster system provides.  I supply 
dual master cylinders as part of the kits I supply.  I have cylinders 
from 13/16 bore up to 1" bore.  Part of my kit is a retainer plate that 
captures the custom actuation rod I supply, so that it minimizes the 
free play and eliminates the possibility of the actuation rod falling 
free of the master cylinder (not a good situation).

I have the Eastwood Forming Tool to make proper flares on the ends of 
the brake tubing.  I can also supply appropriate fittings (without flare 
requirements) that allow splicing your custom brake tubing below the 
master so that you can change just the stub going to the master.  BTW 
the Datsun cylinders require a 10 mm nut to complete the master 
connection.  If you are using the 3/8-24 OEM style connectors, that 
could be part of your problem.  I can supply you with stubs of 
pre-flared tubing, the proper 10 mm nuts, and non flare fittings to 
allow you to splice them into your existing tubing.  If any of this 
sounds like it will help you, call or email me and we can discuss this 
privately.

-- 
Tom Hall
ModTiger Engineering LLC
5712 San Luis Court
Pleasanton, CA 94566
modtiger at comcast.net
(925)462-3876
www.tigerengineering.net

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