Scott Posted June 30, 2009 Share Posted June 30, 2009 At the moment i am giving my rear calipers a paint and a general spruce up. So, i notice that there is only one piston in either side of the caliper. On the pads there are 2 circles for where i would presume the pistons are meant to push but mine only has the 1. Why are they called 2 pot? Are there 2 more pistons behind the main one that is visible? I know its a bit of a daft question but i would appreciate any info/insight. I've not moved onto the fronts yet (4pot). Is it much the same with them? Quote Link to comment Share on other sites More sharing options...
j80leo Posted June 30, 2009 Share Posted June 30, 2009 are they uk? Quote Link to comment Share on other sites More sharing options...
Scott Posted June 30, 2009 Author Share Posted June 30, 2009 are they uk? Yes and no, i have a RZ Facelift so they come with the larger brakes as standard. They are japanese but 2pot rears, 4pot fronts. If you check the pics that Nic has in one of his for sale threads you will see what i mean. I'll get a pic in a sec... Quote Link to comment Share on other sites More sharing options...
Scott Posted June 30, 2009 Author Share Posted June 30, 2009 http://www.mkivsupra.net/vbb/showthread.php?t=98436 Thats the link to the thread. I can't see the pics so don't know which ones to link. Quote Link to comment Share on other sites More sharing options...
j80leo Posted June 30, 2009 Share Posted June 30, 2009 I can't see them either at work lol Quote Link to comment Share on other sites More sharing options...
Scott Posted June 30, 2009 Author Share Posted June 30, 2009 ditto Quote Link to comment Share on other sites More sharing options...
AJI Posted June 30, 2009 Share Posted June 30, 2009 well a 2-pot calliper had two pistons in it, one from either side to act upon the brake disc, therefore only one piston acting on each brake pad. Quote Link to comment Share on other sites More sharing options...
bigbloodyturbo Posted June 30, 2009 Share Posted June 30, 2009 If you have two pads with one ring on each, you have 2 pot rears. If you had 1 pot sliding calipers you'd only have one ring on the inner pad as the outer pad is squeezed onto the disc by the pad carrier, equal and opposite reaction to the force applied by the piston on the inner side of the disc. Thats why when you get seized rear caliper pins the inner pads wears down and the outer pad has plenty of material left Quote Link to comment Share on other sites More sharing options...
Scott Posted June 30, 2009 Author Share Posted June 30, 2009 That explains that then. I had that in my head but i couldn't figure out, if that was the case, how a 1-pot would work lol. Cheers bloodyturbo Quote Link to comment Share on other sites More sharing options...
Scott Posted June 30, 2009 Author Share Posted June 30, 2009 well a 2-pot calliper had two pistons in it, one from either side to act upon the brake disc, therefore only one piston acting on each brake pad. Thanks, as above i thought that but that led me to questioning how a 1pot would work lol. Stupid question now answered Quote Link to comment Share on other sites More sharing options...
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