SleeperZ Posted September 19, 2001 Share Posted September 19, 2001 I converted the front brakes to 280ZX calipers this weekend. I bled them well using my Russel speed bleeders on all four corners, but I still have lots of pedal travel. I still have the 7/8" master cylinder, and I was wondering whether the 15/16" cylinder from the ZX would help this. I bled out the master a few weeks ago, could replacing the front calipers and rear lines have got air up into the master? (I didn't bleed the master out again after the swap) The brakes don't pump up much, so I'm not sure it's air in the system... I'm still running the stock drums in the back, will the ZX proportioning valve work better or worse than the Z valve? I haven't broken the pads in yet, so I don't know whether the front/rear bias is messed up or not. Thanks in advance for your informed comments. Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted September 19, 2001 Author Share Posted September 19, 2001 By the way, who'd a thunk the 14x6 6 spoke wheels would rub on the ZX calipers.. Looks like a tiny bit of grinding can clear them... Quote Link to comment Share on other sites More sharing options...
jeromio Posted September 19, 2001 Share Posted September 19, 2001 When I switched to 280zx front calipers, I also switched to the 280zx rear calipers too, so my experience won't be exactly the same as yours. I only recently switched to the larger M/C. It does sound like you have air. The drums require less fluid movement to actuate, so, that shouldn't be an issue. Check all your connections. Could very well be a bad hose to caliper, or hose to line or something. Did you use the copper washers on the calipers fittings? Quote Link to comment Share on other sites More sharing options...
73BOTIZ Posted September 19, 2001 Share Posted September 19, 2001 Be sure that the bleeder valves on the calipers are on the top. It will make a difference when you are bleeding them. Mike D. Quote Link to comment Share on other sites More sharing options...
Mike C Posted September 19, 2001 Share Posted September 19, 2001 In my experience, mushy brakes in the Z can be caused by rear drums that are not correctly adjusted as well. Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted September 19, 2001 Author Share Posted September 19, 2001 Thanks for the comments folks. I used the copper washers on the front caliper lines, and I don't see any seepage in the connections, but I should check again. I did intall the calipers with the bleeders in the top position. I haven't adjusted the rear brakes, but I use the parking brake all the time, and it only comes up to about 60 degrees - can they be adjusted manually? Quote Link to comment Share on other sites More sharing options...
Mike C Posted September 19, 2001 Share Posted September 19, 2001 Just pull the drums and turn the little star wheel with a screwdriver. Keep test fitting the drum until it just slips over the pads. Quote Link to comment Share on other sites More sharing options...
Guest Locutus Posted September 20, 2001 Share Posted September 20, 2001 On the drums the first time you press the brakes should adjust the shoes to the optimal position. Quote Link to comment Share on other sites More sharing options...
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