Dual Master Cylinder

[Bill MC]

Can I retrofit a '67 dual master cylinder into a '66 body that has the single reservoir master cylinder? I can do the bake line plumbing ... but will the master cylinder be a bolt on thing, will the old brake pedal connect and work...or is it more involved?

Thanks!

[Wagon Master]

Absolute bolt in affair. Worst issue is fitting the bulkhead fittings through the trunk wall, if you're going for pure stock look.

[Bill MC]

Great news Thank you! This is just a fun driving ragtop...and thinking might be a good safety upgrade

[bbodie52]

This is a fairly common upgrade in 1962-1966 Corvairs, but not really possible in 1960-1961 models. See the following link...


http://corvaircenter.com/phorum/read.php?1,485280



https://ssl.corvair.com/user-cgi/catalo ... w_page=145



More to consider when inspecting your aging brake system...

The brake system in your aging Corvair needs to be inspected regularly. Brake fluid should be flushed and replaced every few years. Excess water build-up in the fluid can rust steel brake lines and cause internal corrosive damage to the wheel and master cylinders. Decaying brake lines can burst without warning as they rust internally.

The brake system in your aging Corvair needs to be monitored. The condition of the aging seals in the master cylinder and wheel cylinders is certainly questionable. All should be inspected regularly. The flexible brake hoses also should be monitored, as they can swell on the inside and restrict brake fluid flow. Of course the drums and brake components should be inspected and repaired, as needed, and the brake fluid should be flushed and replaced every few years. (Brake fluid is hygroscopic and absorbs moisture from the air over time. Excess water build-up in the fluid can rust steel brake lines and cause corrosive damage to the internal wheel and master cylinders. Moisture in the brake fluid will also lower the boiling point, which can result in early brake fade as the brakes get hot).

The parking brake assembly is also critically important — not only as an emergency brake but because the Powerglide-equipped Corvair has no PARK position to lock the transmission when you park the vehicle. You must rely completely on the parking brake system to secure the vehicle when it is parked. The front and rear cables and the pulleys should be inspected periodically and lubricated as needed. A frayed cable can separate without warning and possibly leave your Corvair rolling down a hill or driveway if it snaps.

https://ssl.corvair.com/user-cgi/catalo ... graygo.y=0


https://ssl.corvair.com/user-cgi/catalo ... graygo.y=0


https://ssl.corvair.com/user-cgi/catalo ... graygo.y=0
[img]http://ssl,corvair.com/2013SPGFX/150.jpg[/img]

https://www.corvair.com/user-cgi/catalo ... graygo.y=0

[66vairguy]

Bill - Going to a dual MC is a common upgrade. Several ways to do it. Although I like Clark's I DO NOT like their dual MC kit. The Corvair Underground kit is not good either. Poor line routing, won't fit on A/C cars, and other issues.

The easiest way is to simply use all the 67 parts that used a brake warning switch that operated a warning lamp added to the 67 and later gas guage (I have one of those gauges with the light someone gave me). BTW - many think the warning switch is a front/rear bias valve - IT IS NOT.

The next process is to simply buy a 67 dual MC and do your own plumbing. There are some great articles with pictures on the CorvairCenter forum.

In 66 (and later) the Corvair rear brake line size was larger than the 65 line, do verify that before buying parts.