Dan Baldwin Posted July 24, 2003 Share Posted July 24, 2003 This is somewhat discussed in a topic below, just want to confirm something. When I went to 280ZX rear discs on my 240Z, a also put in the ZX 15/16 MC and a bigger-than-my-71's '72 ('73?)+ booster. I want to put a 7/8" MC back in, but my old one isn't compatible, it needs a much shorter pushrod from the booster. So, are there just two configurations of booster pushrod length (long and short) and MC piston socket, and if so, should any 7/8" MC after '72 ('73?) work with my long-pushrodded booster? Quote Link to comment Share on other sites More sharing options...
rags Posted July 24, 2003 Share Posted July 24, 2003 Dan, I think the pushrod lengh requirment is dependant upon what M/C is used and not the booster. So any pushrod that came behind a 7/8" M/C will work. Also, I actually think the pushrods are the same lengh, only the agjusting tip is a different size. Does that make any sense? Joe Quote Link to comment Share on other sites More sharing options...
Dan Baldwin Posted July 24, 2003 Author Share Posted July 24, 2003 Unfortunately the adjusting tips don't just screw right off. I twisted the threaded rod in two trying to remove the short one from my old booster. It's got some funky looking locking threads. I'm certain that later 7/8"MCs are compatible with the longer tipped pushrod, I just need to know the exact years and if there's more than two pushrod+tip length/MC piston socket configurations. Dan Quote Link to comment Share on other sites More sharing options...
jt1 Posted July 24, 2003 Share Posted July 24, 2003 Dan, I don't know. There are at least 5 different boosters that I am aware of, and probably some more. I have wondered why a simple spacer between the MC and the aluminum piece on the front of the booster wouldn't help with the pushrod problem. Like you said, adjusting the pushrod is almost impossible. John Quote Link to comment Share on other sites More sharing options...
Dan Baldwin Posted July 25, 2003 Author Share Posted July 25, 2003 'cuz the studs on the booster are too short. Quote Link to comment Share on other sites More sharing options...
jt1 Posted July 25, 2003 Share Posted July 25, 2003 Studs must vary too. On my current setup, 79 ZX MC with 74 booster, the studs protude about 3/8" thru the nuts. Oh well.... John Quote Link to comment Share on other sites More sharing options...
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