Bone831 Posted February 2, 2012 Report Share Posted February 2, 2012 Any info would be great im running the whole 280 set up up front with a stock 510 drums in rear and 81 datsun master cylinder 10/13 i think my brakes i need to push all the way to the floor for them to grab any help please please Quote Link to comment
Stupid_fast Posted February 2, 2012 Report Share Posted February 2, 2012 Bleed the brakes. My stock calipers did something similar when I first started filling them up. Also get a 280z master, NOT 280ZX. They are much better for rear drum brakes because the 81 master cylander is designed for rear disc brakes which I've heard can 'overpower' rear drums. Quote Link to comment
hobbes_the_cat Posted February 2, 2012 Report Share Posted February 2, 2012 ^^^ the right master cylinder makes all the difference. I have the same problem, and a 280z master solved the problem. but don't forget to bleed the system well.;) Quote Link to comment
Bone831 Posted February 3, 2012 Author Report Share Posted February 3, 2012 So the 280z works on it ill start looking Quote Link to comment
Neil206 Posted September 1, 2013 Report Share Posted September 1, 2013 I assume your problem got fixed? I'm having same issue Quote Link to comment
07FlyingWagon Posted September 2, 2013 Report Share Posted September 2, 2013 Wow - talk about reviving a 16 month old post! :-) I have a 70 510 4dr with drum all around that I will be swaping to disc all around, so thanks for the info! Quote Link to comment
Tristin Posted September 2, 2013 Report Share Posted September 2, 2013 Wow - talk about reviving a 16 month old post! :-) I have a 70 510 4dr with drum all around that I will be swaping to disc all around, so thanks for the info! Was your car imported from Mexico? You should have discs up front with a US 70. Quote Link to comment
devilsbullet Posted September 2, 2013 Report Share Posted September 2, 2013 Bleed the brakes. My stock calipers did something similar when I first started filling them up. Also get a 280z master, NOT 280ZX. They are much better for rear drum brakes because the 81 master cylander is designed for rear disc brakes which I've heard can 'overpower' rear drums. other way around, it'd underpower the rear drums. if I remember what I was told by wayno correctly, disc brakes only need about 3 pounds of pressure to work. drums need about 10-12 since they don't sit directly on the brake like a disc pad does. Quote Link to comment
datzenmike Posted September 2, 2013 Report Share Posted September 2, 2013 Gees just swap the residual valve from the drum master into the ZX or Z, (although I don't see why you would run a 7/8" z master on larger zx calipers that came with a 15/16" master) rear master. Done and done. I put a 15/16" ZX master in my 710 because of the larger Maxima calipers. All I did was put the 710 rear residual valve in it. Good to friggin go!.... Quote Link to comment
devilsbullet Posted September 2, 2013 Report Share Posted September 2, 2013 cause a 7/8 is sufficient, and you don't need to swap any residual valves. i'm still runnin a 3/4 on my 510 goon with rear discs from a 200sx. stops me just fine lol. I might have to go to a 15/16 on one of my 710s tho. just thinking of it mike, was it goon or sedan struts/brakes you swapped on, or would it really matter? Quote Link to comment
Uber Deaf One Posted September 2, 2013 Report Share Posted September 2, 2013 I'm running a 15/16" ZX MC with 280zx front struts/brakes, and stock 510 rear drums. All 4 wheels lock up at about the same time. I've had people drive my car then say oh no the brakes don't work. They work, you just have to press them a little harder. I prefer manual brakes, I hate locking up tires with just my big toe resting on the pedal...This MC will be perfect when I get the Maxima calipers on the back. Just got to make my own brackets... Quote Link to comment
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