tomgregory2000
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| posted on 26/7/09 at 01:18 PM |
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Another brake question (sorry)
Is it better to have equal size pistons on 4 pot's or is it better to have 2 small pistons and 2 larger ones?
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Cousin Cleotis
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| posted on 26/7/09 at 02:10 PM |
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Unequal for even pad wear, but if the pads are quite short it wont make much difference.
What options have you got? What calipers are they?
Paul
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britishtrident
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| posted on 26/7/09 at 02:39 PM |
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Very strange calipers -- no very very bad idea the pads will wear tapered and cause a very spongey pedal
I have seen calipers with one large piston on one side facing and two small piston (ie total effective area on each side were equal) but this was
a production car Girling caliper back circa 1968 fitte to the Austin 1800S, Austin 3 Kires and MK1 XJ6
[Edited on 26/7/09 by britishtrident]
[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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tomgregory2000
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| posted on 26/7/09 at 03:26 PM |
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i ment the front(top) 2 pistons one size and the back(bottom) 2 pistons a different size
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britishtrident
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| posted on 26/7/09 at 03:32 PM |
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No that won't work the unbalanced force will just try and bend the disc and mounting bracket --- hydraulic area has to be equal.
[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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bram boekestein
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| posted on 26/7/09 at 03:39 PM |
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quote:
Originally posted by britishtrident
No that won't work the unbalanced force will just try and bend the disc and mounting bracket --- hydraulic area has to be equal.
Yes it will, because equal size pistons will be opposite off each other. All 6pot's have a big leading piston and 2 small pistons trailing.
Like this(big piston needs to be on top):
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