JoelP
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| posted on 18/4/07 at 08:07 PM |
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What bore master cylinder?
Hi guys. Im running raceleda discs and r16 callipers at the front and standard sierra drums at the back. Im planning on using a single master cylinder
as i dont think i will have a problem with rear bias. Any advice on what size M/C to get for track use?
Cheers. 
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RazMan
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| posted on 18/4/07 at 09:45 PM |
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A lot depends on the pedal ratio but if you are using one m/c for all the calipers I would think you will need to be around 0.75". Personally I
would fit twin m/c so you can adjust front & rear independently - it will be stuck with whatever bias the m/c allows.
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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JoelP
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| posted on 18/4/07 at 09:51 PM |
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cheers raz. I just need a start point, the drums will get replaced eventually i just need to get it moving. Will look into a 0.75. Is a 5 to 1
pedal ratio in the right ball park to start at?
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mackei23b
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| posted on 19/4/07 at 07:32 AM |
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This might be useful
http://www.rallydesign.co.uk/catalog/pedalratio.php
Cheers
Ian
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RazMan
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| posted on 19/4/07 at 07:58 AM |
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My own pedal is a little less than 5:1 and I found the pedal a bit scary to start with  but you soon bring the leg muscles up to spec 
If you can manage it, 6:1 is better. Your pedal may feel different due to having 4 calipers and I can't help wondering if a single m/c will be
up to the job - two m/c will give you a better pedal, some bias adjustment and more security if you spring a leak.
At the very least I would go for a tandem m/c which would cover the last point, especially if you are intending to use the car on the track.
Just my 2p
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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