Did a 5 lug swap YEARS ago in my '79 Zephyr, and my brakes have never felt quite right. I'm considering swapping my master cylinder but thought id see what the experts here think first. My pedal sometimes feels okay, but if I need to stop fast the pedal feels kind of "dead" and it doesn't react like it should. If I'm stopping slowly it generally feels okay. I can't lock my brakes front or rear. Heres my combo:
94/95 GT front spindles/calipers/rotors
94/95 GT 8.8 with stock discs and calipers
gutted prop valve
Jegs adjustable prop valve (currently fully open to the rears to help me out)
Started with the 94/95 GT master cylinder and pedal was too stiff, now have the 1985 Lincoln Town Car Master Cylinder (1" bore)
Stock 1979 Zephyr brake booster
*I did NOT adjust my pushrod length as per the LMR instructions when installing master cylinders, I didn't even know that was a thing to do when I was 18 and doing the swap in ~2008*
I'm not interested in swapping boosters if I can help it.
My car sat for about 4 years and upon getting it going again I found both rear calipers frozen, so I replaced them. My fronts were fine.
I'm 95% certain my brakes are bled well, as I used the Motive pressure bleeder and ran it until fresh fluid came out and no bubbles on all corners. the only thing that gives me pause with regards to by brakes being bled well is that the pedal feels inconsistent. As I said sometimes if I stop slowly the pedal feels pretty good, but if I suddenly need to jam on the brakes it almost always lets me down and feels like I cant really stop if I need to.
I'm considering swapping in the 94/95 Cobra master cylinder with a 15/16 bore to give me a bit softer pedal.
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