Clifton Posted June 29, 2004 Share Posted June 29, 2004 I am using the 1.75"s in one car but have the 15/16" MC in it. Has anyone tried the smaller 1.38" bore Superlight II calipers with the 7/8 MC. I am going 5 lug on my daily driver and I don't think I want to spend the money on Z31 rotor spacer + the pads ect, when Wilwoods are just a little more. But then I also would have to buy a new MC if I use the Wilwoods, adding even more $$ to a car that will never see track time to use them. So, any reason not to use the 1.38" bore calipers? Quote Link to comment Share on other sites More sharing options...
blueovalz Posted June 29, 2004 Share Posted June 29, 2004 IMHO I would only use this small a bore for the rear brakes. This size of piston(s) is less total piston area than the OEM front calipers were. With the 15/16" MC that you already have on the car, it would make the situation even worse (reduction of the brake cylinder and increasing the MC). Quote Link to comment Share on other sites More sharing options...
Clifton Posted June 29, 2004 Author Share Posted June 29, 2004 I cleared up the first post. This car has the 7/8" MC. I am using the Toyota solid rotor calipers now with this car and it works fine with the staggered 1.2" and 1.5" pistons. I figured the 1.38" would be about the same. Quote Link to comment Share on other sites More sharing options...
blueovalz Posted June 29, 2004 Share Posted June 29, 2004 Your revised first post now makes much more sense. Being you're maintaining roughly the same ratio as before, it would appear you should have no problem with the swap in regards to "feel". Quote Link to comment Share on other sites More sharing options...
Dat260 Posted August 12, 2006 Share Posted August 12, 2006 Hi Guys, Sorry for bringing an old post but it relates to my question. I have a chance to buy a set of Wilwood calipers at a good price, they have 1.12'' piston size for .81'' rotors. Would they be too small for the front on a mildlly built L28 street driven Z? or better for the rear? The M/C will be 15/16 or it can be the stock 260, I have both. Thanks, Ari Quote Link to comment Share on other sites More sharing options...
blueovalz Posted August 12, 2006 Share Posted August 12, 2006 These would be much two small. The OEM piston area is somewhere in the neighborhood of 2.25" (it's been a while since I've measured one). Your query of using 1.125" pistons (dual per side) would provide a total square area of 1.98^ inches. This compares to the OEM area of around 3.97^ inches. Your goal would be to stay somewhere in the 4" range. These would be good candidates for the rear though. Perhaps on the small side, but usable. Quote Link to comment Share on other sites More sharing options...
Dat260 Posted August 12, 2006 Share Posted August 12, 2006 Thanks Terry. Quote Link to comment Share on other sites More sharing options...
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