At 09:25 PM 2/10/99 +1100, you wrote:
>Dear Jim
>
>Peddle pressure should be about the same as you are will be applying the
>same power as before. The connection closest to the fire wall/peddle will
>have lower pressure as the rod going into the next chamber will reduce the
>surface area that can be used, therefore the pressure that can be achieved
>will be lower. This chamber should go to the rear wheels.
>
>Let me know how you get on, and what master cylinder you use, as I may be
>interested in doing the same mod.
>
>
>Cheers
>Wally Menke in Summer OZ
Wally,
I convienced myself that the necessary pressure on the peddle
would be 2X the original. In fact since I was going to use a 78 Mustang
cylinder which was 15/16 bore vis the 7/8 bore of the Tiger the pressure
would be 2.3X. I am now in the process of installing an 83 Mustang
power brake unit. I am using a Tiger clutch slave cylinder to push
the rod of the power brake unit. The original Tiger master cylinder
will feed the slave cylinder. I fabricated an attachment to the power
brake unit rod (odd shaped SOB) that extends into the slave cylinder.
I fabricated an assembly to mount the power brake unit and the
slave cylinder in the proper alignment. The assembly is a total
of 21" long. I am mounting it in the trunk. This will give me power
dual braking. The original Tiger master cylinder and the clutch slave
cylinder will still be a single point failure problem; however the
pressure should be much lower than original as I am pushing
the power brake rod and not the regular brakes.
The slave cylinder has a 7/8" bore so the displacement will be
1:1. I may remove the check valve from the Tiger master cylinder
if it causes the power brake unit to be partly activated.
The whole thing so far is under $150.
I noticed that if I were to remove the gas tanks I could
put the power brake unit in the fenderwell and the battery in the
other fenderwell. Now with an about 30"X22"X6" gas tank mounted
on the floor of the trunk I would have more usuable space than
I started out with and increase the fuel capability to 17 gallons.
Considering fabricating the gas tank. Mean while I will just
mount the power brake unit assembly on the trunk floor.
James Barrett Tiger II 351C and others
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