Brake Bleeding ?

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Jun 25, 2005 | 11:15 PM

#21

Henigejunk

Heel & Toe

Joined: Feb 2005

Posts: 16

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On C1's the farthest brake is driver rear. Line goes to rh side of rear axle and splits to both sides.

Jun 26, 2005 | 12:21 PM

#22

JohnZ

Team Owner

Joined: Oct 2000

Posts: 38,897

Likes: 1,926

From: Washington Michigan

Quote:

Originally Posted by autocolor

I would like to know more about the RPV valve and what dual MC I should look for with a RPV in only one of the cylinders does any one know of such a MC ?
Also when running a dual system is it best to split back to front or alternate sides ie; drivers front / passenger rear -- passenger front / drivers rear ?
Keep the ideas coming guys
Cheers
Mike .

Any dual master cylinder made for a disc/drum system (like Camaros, etc.) will be properly configured (no RPV in the front disc outlet port, RPV in the rear drum outlet port). The standard design convention for rear-wheel-drive cars is a front/rear split.

Jun 26, 2005 | 05:27 PM

#23

autocolor

Thread Starter

Racer

Joined: Jun 2003

Posts: 433

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From: Aspenden Hertfordshire U.K.

Thanks for that John it all begins to make more sense now . I see there is a dual MC kit in the CC catalogue which has a residual valve and metering block included as well as an extension piece to move it all forward for bulkhead clearance . Do you know of ant MCs that would fit directly onto the bulkhead or if the extension piece is available as a seperate item from anywhere ? Also I only do around 1500 miles through the summer , do you think it will be safe to run the brakes on the old MC for this period of time bearing in mind your earlier comments regarding possible drag on the front discs and rotors ?
Thanks again for all your valuable advice
Mike .

Jun 26, 2005 | 06:43 PM

#24

GTS34

Instructor

Joined: Nov 2003

Posts: 162

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From: Howell NJ

Quote:

Originally Posted by JohnZ

Here's a typical bench-bleed setup; you just run a line from the outlet back into the reservoir, below the fluid level, and stroke the rear piston with a phillips screwdriver until you see no bubbles exiting the tube - that removes all the trapped air in the master cylinder bore, which can't be removed any other way. This is a dual master - yours would only use one line.

Can't the bleed screws found on the 67+ Style Dual Master Cylinder (like pictured above) be used for bleeding the master cylinder when Bench Bleeding?

Jun 27, 2005 | 11:47 AM

#25

JohnZ

Team Owner

Joined: Oct 2000

Posts: 38,897

Likes: 1,926

From: Washington Michigan

Quote:

Originally Posted by GTS34

Can't the bleed screws found on the 67+ Style Dual Master Cylinder (like pictured above) be used for bleeding the master cylinder when Bench Bleeding?

Yes, but it's messier, you have to plug the outlet ports, and can still have air trapped between the ends of the bleed ports and the outlet ports when you're done. That's why they eliminated the bleeders on the later service replacement castings and production master cylinders.

Jun 27, 2005 | 11:59 AM

#26

JohnZ

Team Owner

Joined: Oct 2000

Posts: 38,897

Likes: 1,926

From: Washington Michigan

Quote:

Originally Posted by autocolor

Mike, that looks (finally) like a properly-engineered kit. The RPV is separate from the master cylinder to take care of the rear drum system, and has a metering valve for the front discs. The metering valve in the front system holds off any line pressure to the front discs until the rear system sees 30-40 psi to avoid "nose-dive" from the fronts coming on before the rear shoes take up (that feature is included in the "combination valve" fitted to current production OEM disc/drum systems).

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