catman
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| posted on 30/10/12 at 07:36 PM |
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shoe material
I have a koln cortina rear axle on my Supersix with drum brakes, I am wanting a little more braking at the rear as the fronts have been upgraded, even
with the bias lever to the rear I want more braking so my options are to convert the tina axle to disc (expensive) or another would be to get the
brake shoe material changed to a race compound, I have found a company that will do this but my question is has anyone else gone down this route?
Ed
caged supersix
Carbon/GRP
210 bhp silvertop
190 lbft
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Peteff
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| posted on 30/10/12 at 08:29 PM |
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You'd be better looking at cylinder bore sizes to make the difference. Harder compound brake shoes will take longer to heat up the drums and not
work as well as standard.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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JAG
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| posted on 30/10/12 at 09:08 PM |
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I wouldn't use a different friction material.
I went the route of a larger wheel cylinder bore. Ford drumbrakes use the same wheel cylinder design between different models - have a chat with your
local dealer.
This is a far better way to increase rear brake output.
Justin
Who is this super hero? Sarge? ...No.
Rosemary, the telephone operator? ...No.
Penry, the mild-mannered janitor? ...Could be!
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britishtrident
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| posted on 30/10/12 at 09:41 PM |
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Brake balance bars only really work well within a few turns of the centre position and also need sufficient side clearance to allow the bar to pivot
sufficiently.
The answer is either fit bigger bore on the wheel cylinders on the rear or a smaller bore master cylinder in the rear circuit.
Changing the the friction material isn't the answer because the coefficient of friction will change with brake temperature.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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catman
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| posted on 31/10/12 at 08:16 AM |
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ok thanks for that just to clarify this is my current set up
hi spec four pots up front
single master cilinder
brake bias lever on dash (not balancr bar)
sounds to me i should get another master cylinder, how easy is it to do? and how do i know what size and spec i need, do i speak with rally design?
Ed
caged supersix
Carbon/GRP
210 bhp silvertop
190 lbft
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britishtrident
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| posted on 1/11/12 at 08:19 PM |
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Remove the valve and very carefully test without it. some of the lever adjustable valves on sale don't actually have any effect at
the low pressures in seven style car brake systems. Test a slow speed on good smooth clean dry tarmac
A lot depends on which Cortina rear brakes you have they come in 8" and 9" varieties with different size wheel cylinder options.
If you have a Sierra master cylinder then you can reduce the pedal effort by fitting a smaller bore master cylinder.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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