A couple of Master Cylinder question

[Racer X]

1) Will the master cylinder from a 1994 ATX work on my 1992 MTX?
2) How can I test a MC while it is out of the car?
3) Do the outlets feed front and rear, or diagonally?

 

[kzoosho]

1) Will the master cylinder from a 1994 ATX work on my 1992 MTX?

yes thats the only one i can answer

 

[Bob Gervais]

1) Yes.
2) Not sure, but usually MC failures consist of external leakage, or internal leakage between ports.
3) Diagonally, but through the brake system. Not a function of the plumbing on the master.

 

[Racer X]

Thanks Bob. At 220,000 miles, the one on my 92 is beginning to show signs of internal leakage, and I still have the one from that 94 that my 3.2 came out of, and planned on using it. I guess I'll find out what's what when I install it.

On the question of what ports feeds what on the brake system, I'm planning on plumbing in a maunal proprotioning valve, since the stock one sucks balls, IMO. If the MC fed the fluid front and rear, I would only have needed a single line model, but since it doesn't, I'll be needing a dual line model.

 

[Bob Gervais]

I'd say 220k is a good service life.

Manual prop valves inside the car, like on the console or something, would kick ass!

 

[CerberuS]

I'd say 220k is a good service life.

Manual prop valves inside the car, like on the console or something, would kick ass!

Rally cars has that , its prolly VERY doable.

 

[Racer X]

I'd say 220k is a good service life.

Manual prop valves inside the car, like on the console or something, would kick ass!

Yes, yes it would.

 

[SHO Dude]

Only problem is that you'll need two of them.

Our cars have a crossed hydraulic system. Piston 1 feed right front and left rear. Piston 2 feeds left front and right rear.

To make a prop valve work, you'd need to proportion both rear brakes and use two valves.

Second option would be to re-plumb the system and make piston 1 feed both front calipers and piston 2 feed the both rears. This can be done at the ABS HCU, but is a pain in the rear.

 

[Racer X]

Only problem is that you'll need two of them.

Our cars have a crossed hydraulic system. Piston 1 feed right front and left rear. Piston 2 feeds left front and right rear.

To make a prop valve work, you'd need to proportion both rear brakes and use two valves.

Second option would be to re-plumb the system and make piston 1 feed both front calipers and piston 2 feed the both rears. This can be done at the ABS HCU, but is a pain in the rear.

This is why I plan on using a Dual Inlet/ Dual Outlet prop. valve, plumbed in after the HCU. Schematically, it'll be in the same location as the stock unit, but physically it'll be at the front of the car rather than the rear. I'm just waiting to hear back from a couple of companies whether or not the inlets and outlets are truly separate, or if they mix at any point, which would do some interesting things if the ABS kicked in.

 

[DemonNeno]

I'm also looking into manual proportioning valves for the '89 in conjunction with a rear brake upgrade. Please do post anything you have figured out if you don't mind!