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Brake master cylinder with same bore and pushrod interchange

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I'm looking at replacing my tii brake master cylinder and after searching I can't find a definitive answer as to what is the difference between this and other model cylinders of the same bore size: 23mm and pushrod of 1.92". the only difference I can see is the brass valve to adjust the flow to the rear brake line.

The 2800 and e12 appear to have the same bore and pushrod depth.

I would like to find a cheaper (but the same part) where i can just screw in my brass valve. Any ideas?

Thanks,

Rob

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what's wrong with using a 2002 Original master cylinder?

what brake issue are you repairing ?

Did big BBK conversion with stainless steel lines all around and tii MC.

volvo calipers/320 hubs/rotors, 320 rear drums.

After sitting for several years, rear cylinders were leaking, brakes were soft and car pulled to right. I replaced rear cylinders and bled system and brakes are still soft car still pulled to the right. When removed from hub, left caliper pistons move freely, bled the heck out of the system and car still pulls to the right. So i'm left thinking the MC is bad and haven't seen any definite answers on MC differences. So want to figure that out before I have to order a new one.

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the only difference I can see is the brass valve to adjust the flow to the rear brake line.

The 2800 and e12 appear to have the same bore and pushrod depth.

I would like to find a cheaper (but the same part) where i can just screw in my brass valve. Any ideas?

Thanks,

Rob

This is not a bias or flow valve. it is a pre-pressure valve. It holds the brake fluid from retracting the rear pads completely to the adjusting pins. While the distance is negligable it is certainly a different timing without the pre-pressure valve in place. Wilwood makes an in-line valve. Other model MC's that can be used for pushrod length and booster mounting don't have the same thread bore and pitch to use the pre-pressure valve. The cost of using a non 2002 MC and adding an in-line valve as well as buying the correct diameter gromets for the resevoir elbows, is close to using a 2002 MC or rebuild kit.

I have seen threads on this topic that start to talk about mathematical displacement of fluid in the Girling calipers and e21 rear cylinders and which MC to use, but if your going by feel, the stock MC may seem more "natural"

Daron

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and e9 MC.

My big brake setup was fine with the tii master cylinder. I am just looking to see if an e9 or e12 is the same thing with out the valve. I have nor found the e12 specs, although people say it's a good MC to use.

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post-19295-13667669158629_thumb.jpg

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