volvo 4 piston brake calipers – TigersEast AlpinesEast

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October 3, 2005 at 5:14 pm #59792

todd-reid

I read a quote on the Internet (probably the same place Jim did) that clamping force (braking) is only increased by increasing piston size. Based on what I learned in high school physics class that is a true statement, but I believe it is an over simplification of the braking system in our cars.
If brake pad size was irrelevant, there would be no reason to make your pads any larger than your pistons. If you look at any modern high performance car you will see multi-piston calipers, large brake pads and big rotors. When I sent an e-mail to England asking about Austin Princess 4 piston calipers, I was informed that they are almost impossible to find, because the MG & Triumph club racers buy them all up. I assume these guys aren’t trying to impress the chicks – they buy them because they work better.
Perhaps John or another club member can discuss this issue on a more scientific level then I can. Otherwise perhaps we can do a comparison
test between the cars Jim has modified and stock.

In answer to Johns question above, Beck Arnley rebuilt Volvo calipers available from Rock Auto for under $40 with no core required. I don’t think you can rebuild your Sunbeam calipers for anything close to that.