mouse240z Posted June 10, 2015 Share Posted June 10, 2015 Hi All, Does anyone know where I could purchase a 15/16 brake master cylinder for a 240z in Melbourne? I purchased a Willwood 1" and it is way to hard for the 4 spot caliper setup I,m running. Cheers Kevin. Quote Link to comment Share on other sites More sharing options...
Roady Posted June 11, 2015 Share Posted June 11, 2015 Hi Kevin, I'm sure there will be plenty of ideas out there but when I upgraded to larger calipers I went with a Nissan Patrol 1" bore. Still all mounts straight up to the original set up and easy to buy brand new from a brake place. I can't remember price but it wasn't outrageous. I can find you a part number if you are interested or someone else might have it handy Quote Link to comment Share on other sites More sharing options...
hmd Posted June 11, 2015 Share Posted June 11, 2015 http://www.viczcar.com/forum/index.php?topic=8317.0 JB1361 is the part number, google it there's plenty online stores that sell it. Quote Link to comment Share on other sites More sharing options...
C.A.R. Posted June 11, 2015 Share Posted June 11, 2015 Go back to a 7/8 M/C & re-adjust your pushrod, Kev... Quote Link to comment Share on other sites More sharing options...
mouse240z Posted June 12, 2015 Author Share Posted June 12, 2015 Lurch, I was kind of thinking along those lines myself to install a 7/8''just to see how the pedal feel would be. A lot of other people have posted so called good results from 15/16'' master cylinders with willwood 4 spots. I am sceptical that a 1/16 reduction from 1'' to 15/16 would give me the pedal feel I'm after. Quote Link to comment Share on other sites More sharing options...
C.A.R. Posted June 12, 2015 Share Posted June 12, 2015 PM your braking details - pad size cross-section, pistons dia & how many there are, effective disc size. I'll run the calcs early next week & give you the results for what size MC you need. Quote Link to comment Share on other sites More sharing options...
dat2kman Posted June 12, 2015 Share Posted June 12, 2015 Do a calculation of square mm area of stock calipers (4 pistons) vs the new Wilwoods, (8 pistons) Then calculate square mm area of stock m/c, vs 15/16 vs 1" Fr a gven dstance of travel each m/c displaces a given qty of fluid, then divide that into the calipers ( total sq mm) That will give an indication of what combo is closer to stock. Bear in mnd, the bigger the m/c, the greater the pedal effort to displace. Quote Link to comment Share on other sites More sharing options...
mouse240z Posted June 12, 2015 Author Share Posted June 12, 2015 Thanks for everyones input so far. Lurch I will PM you figures I have on hand. Quote Link to comment Share on other sites More sharing options...
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