Stock MC with 4 wheel discs

[nbristow01]

Yes I tried to search. Everytime I do a search I get popups them my conputer freezes...so will ask here. I just got in my front Big Brake kit, also have a rear disc converion coming in from Dave at Aardvark. My stock brake master is less than a year old and I hate to just have to buy another (528 one). Can I use my stock one? I know it has a restrictor type thing that is designed to run rear shoes but can it work as well on the discs? If not can I alter my brake MC to work with the rear discs?

[gracer]

The device to the rear cylinders is not a restrictor. It is a pressure retention valve. It keeps ~ 2 lbs pressure in the rear system to keep the shoes close to the drums.

Is your car a 2002 or a TII? If a 2002 the master cylinder/ brake pedal will travel farther to pedal firmness. If a TII it will have less travel. G

[nbristow01]

Mine is a non Tii. SO this stock one should work fine just a bit more travel to firmness?

[M3M3]

by "BBK" i assume you just mean the vented volvo conversion, not a real "BBK"?

you should delete pressure retention valve on the rear brake circuit. other wise rear brakes are always dragging just a touch. you will need some sort of thread adapter or gut the valve and put it back.

stock mc will work, just be ready for a longer pedal.

[TobyB]

Might also be a good idea to do the math yourself-

measure total piston area of the front, total piston area of the

rear, and see what the hydraulic leverage will be.

I don't know how Dave's rear discs work- if the caliper's

floating, multiply the area of the piston by two to account for it.

That'll also tell you how your ratio front- to- rear is going to be.

hth

t

[nbristow01]

by "BBK" i assume you just mean the vented volvo conversion, not a real "BBK"?

you should delete pressure retention valve on the rear brake circuit. other wise rear brakes are always dragging just a touch. you will need some sort of thread adapter or gut the valve and put it back.

stock mc will work, just be ready for a longer pedal.

Yes it is actually the 320 fronts with Volvo calipers. Is there a schematic or old blog around on how to remove this retention valve? I can no longer do searches on FAQ, even site search, which is google, because my computer keeps crashing

[nbristow01]

Might also be a good idea to do the math yourself-

measure total piston area of the front, total piston area of the

rear, and see what the hydraulic leverage will be.

I don't know how Dave's rear discs work- if the caliper's

floating, multiply the area of the piston by two to account for it.

That'll also tell you how your ratio front- to- rear is going to be.

hth

t

My better and smarter half (wife) said to get the 528 MC and quite thinking about it

[Guest_anonymous]

Nick, If you are going to use an e12 master cylinder, and the MC does not come with the correct rubber grommets for the resevoir elbows, here is the part number: 34-31-1-121-911 22/8

22mm outside diameter to fit in the MC/ 8mm inside diameter to fit the resevoir elbow

Daron

[nbristow01]

Nick, If you are going to use an e12 master cylinder, and the MC does not come with the correct rubber grommets for the resevoir elbows, here is the part number: 34-31-1-121-911 22/8

22mm outside diameter to fit in the MC/ 8mm inside diameter to fit the resevoir elbow

Daron

Thanks would suck to get it and have no grommets

[nbristow01]

So which MC do I order with my 320 rotors and volvo calipers up front. Tons of info in the forum searches (my computer quite crashing) and I see E12 this 528 that, E24 E28 but never a part number. So here is what I have found

34311120832 and use with the 22/8 grommets

34311153919...no idea what grommets I would need

I am certain this may be an aggravating question but I just only want to order once and order right with all parts I may need to complete the swap

[nbristow01]

I am running dual lines up front like stock, not converting to single lines

[ClayW]

I have a tii MC with Volvo/E21 discs up front and VW discs in the rear. Pedal travel and pressure is great. I have no proportioning valve.

http://tx02.blogspot.com/2012/05/rear-disc-brakes.html