omega0684
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| posted on 21/3/10 at 06:59 PM |
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Pedal Box Ratio's
i was just having a gander through the Rally Design website and drooling away as usual when i cam across these two pedal boxes.
Pedal Box 1
Pedal Box 2
The first has a ratio of 5:1 & the second has a ratio of 6.25:1, but i don't understand what there ratio's are for?
Cheers
Can someone please explain what they are for?
I love Pinto's, even if i did get mine from P&O!
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r1_pete
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| posted on 21/3/10 at 07:09 PM |
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Ratio of the stroke of the foot pedal in relation to piston travel, or cable pull.
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omega0684
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| posted on 21/3/10 at 07:18 PM |
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so the piston moves 1 cm when the pedal moves 5 cm?
[Edited on 21/3/10 by omega0684]
I love Pinto's, even if i did get mine from P&O!
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britishtrident
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| posted on 21/3/10 at 07:57 PM |
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Very difficult to get a decent pedal ratio in any Seven style car even with top hinged pedals.
Even if long pedals are used to get a high pedal leverage ratio the true mechanical advantage depends on where the drivers foot makes contact with
the pedal pad.
[Edited on 21/3/10 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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omega0684
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| posted on 21/3/10 at 08:17 PM |
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So what would be best to go for the 5 or the 6.25?
I love Pinto's, even if i did get mine from P&O!
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matt_claydon
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| posted on 21/3/10 at 10:07 PM |
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Without knowing anything about the rest of the brake system (master cylinder piston sizes, caliper piston sizes and quantity, brake disc diameter)
that's rather like asking how long a piece of string is!
However, without a servo most people are looking for the most braking they can get from a given pedal force. You should therefore go for the longer
pedal (6.25); the compromise is you will end up with a bit more travel.
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britishtrident
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| posted on 22/3/10 at 01:03 PM |
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You need to check the dimensions first other wise you could find you are operating the pedals with your heels --- a rather over priced mistake.
[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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Rod Ends
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 posted on 22/3/10 at 02:03 PM |
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you can find dimensioned drawings at the wilwood site.
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