dual circuit braking upgrade question

vwretrosteve · Post by **vwretrosteve** » Mon Oct 19, 2009 4:03 pm

thinking about replacing the single circuit master cylinder with a dual circuit alternative -

any pointers on which master cylinder is appropriate - i was thinking along the lines of early bay or late type 3 vw cylinders .
just wondered if there was a tried and tested route for this before i start .

thanks

cubist · Post by **cubist** » Mon Oct 19, 2009 4:25 pm

From Vic Skirmants...

Brakes
The dual-circuit master cylinder is pretty easy. With drum brakes, use a VW 19mm; 1967 Type I, #113.611.015 BD. For disc brakes, the 911 #911.355.012.02, reservoir #911.355.013.13. Use the proper reservoir to master cylinder blue hose, #999.181.021.50. It’s almost $18.00 per meter, but that’s all you’ll need, and no other material will last with brake fluid. Don’t use fuel line or clear plastic hardware store hose. The reservoir will require a small vent line. Run it upward and then back down. No brake fluid should really get in there and stay, so clear plastic hardware hose is fine for this application.
Plumbing the 911 master cylinder is a little different than the 356 m/c. The
911 cylinder has only one outlet line for the front brakes. Simply run a metal brake line to a ‘T’ fitting and then to the front brakes. You will also need a ‘T’ fitting for the rear brake line so you can install a brake light switch because the 911 master cylinder does not contain a brake light switch like the 356 or VW does.
The switch on the side of the 911 master cylinder is a warning light switch for brake failure. Since the 911 master cylinder extends into the car more than the 356 cylinder, the brake actuating pushrod from the pedal will need to be shortened accordingly.

http://www.356enterprises.com/Go%20Vintage.PDF

vwretrosteve · Post by **vwretrosteve** » Mon Oct 19, 2009 5:31 pm

cheers, much appreciated

40 scout · Post by **40 scout** » Mon Oct 19, 2009 6:31 pm

I bought a kit from al zim - easy - all parts there - worked a treat

cubist · Post by **cubist** » Tue Oct 20, 2009 7:31 am

I can vouch for that too...

http://www.allzim.com/acatalog/356_Dual ... rsion.html

Ajer · Post by **Ajer** » Tue Oct 20, 2009 4:04 pm

I bought everything from PRS.
Very good price and excellent service....
They took the time to take me through the whole fitting
The quality of the kit was brilliant...cupanickle hard-lines, norma clips, correct over-braide feed hose ETC.