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Username Post: wilwood calipers, d8-4, brake issue        (Topic#346026)
300stw 
Forum Newbie
Posts: 50

Reg: 01-13-15
07-14-17 06:38 AM - Post#2700053    

i did the c3 vette conversion and used the wildwood calipers, d8-4 and a raybestos non power master cylinder,

the brakes always have a drag on them and the front hubs are hot after a 10 mile drive. took the master cylinder off the firewall so the pushrod isn't engaged doesn't release pressure on caliper, break loose a brake line at caliper, pressure bleeds off, wheel spins free,

so do I have a bad master cylinder, does it have an internal 5psi check valve or? when I look in the brake line ports on master cylinder I cant tell if there is a residual valve, do I rebuild master or?

thanks



Edited by 300stw on 07-14-17 06:40 AM. Reason for edit: No reason given.

 
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aghaga 
"4th Year" Silver Supporting Member
Posts: 2102
aghaga
Age: 63
Loc: Altavista, Va.
Reg: 07-05-08
07-14-17 07:53 AM - Post#2700062    
    In response to 300stw

Try putting a small flat washer on the studs between the master cyl and booster and see if it helps the situation. There may not be any clearance between the booster push rod and the master cyl piston.



 
300stw 
Forum Newbie
Posts: 50

Reg: 01-13-15
07-14-17 09:40 AM - Post#2700070    
    In response to aghaga

I pulled the master all the way off the studs to make sure the rod wasn't the problem, also the push rod is adjustable, I even shortened it before I pulled the master off the firewall,,,



 
Crusty66 
"5th Year" Gold Supporting Member
Posts: 302
Crusty66
Age: 57
Loc: Albany, eNZed
Reg: 11-04-12
07-14-17 01:12 PM - Post#2700082    
    In response to 300stw

You might have a drum brake prop valve. Try releasing pressure at the master cyl first, then if still dragging, release at prop valve. If that works fit a disc/drum prop valve.

Steve
1966 Caprice 396 496 496mkII TH400


 
300stw 
Forum Newbie
Posts: 50

Reg: 01-13-15
07-17-17 05:43 AM - Post#2700320    
    In response to Crusty66

I should have mentioned, don't have a proportioning valve at all, ordered a new master cylinder will see if anything changes,,,



 
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