<VV> Brakes MC

[Frank DuVal]

Dual MCs are great, but not easily adapted to an early early. The MC 
mounts inside the car, not trunk.

Also, things still happen. Like the common "time for a MC replacement" 
warning when the brake pedal falls slowly to the floor with slight pedal 
pressure. This occurs both on single and dual MC.

Twice I had total failure on a dual system. The first time the car was a 
daily driver. The brakes seemed "different", but good pedal so I paid no 
attention. Later (months...) I step on the pedal hard for a changing 
light and to the floor we go. Only through use of headlights, horn and 
steering did I navigate the 70 Buick Estate wagon through the 
intersection loaded with other cars. Not enough time/ distance to use 
parking brake.

Autopsy showed front brake line had rusted and burst with the high pedal 
pressure. Hint: hard HARDER test is good even for daily drivers. The odd 
feeling brakes was crud built up in the MC and blocked the port to the 
rear wheels. They had stopped working. 4400 pound car seemed almost to 
stop OK on front drums alone for months. Shows what poor brakes they are 
to begin with...

That was 19 years ago. About 2 years ago, car not in service, went to 
move it in the yard and pedal again went to the floor. Of course I was 
almost still at the time and expecting trouble. Yep, both a rear and 
front line had rusted while parked.

Back to Corvair content. Despite my total failure with dual MCs, I do 
install them on Corvairs I intend to drive and not show as stock. I just 
remember to pay attention to "Odd" changes in brake behavior.

Frank DuVal

BBRT wrote:

> An MC helps in those situations where the failure occurs at a wheel, 
> like in Tony's case.  However, a dual  MC (69 Olds Toro) can fail 
> where the fluid passes the plungers within the MC. It is a much rarer 
> occurrence but it can happen and one gets the honor and privilege of 
> driving home on the E Brake... or you can leave it and have it 
> towed... but when one has zero funds, it isn't much of a choice!  LOL!
>
> Chuck S
> ----- Original Message ----- From: "Chris C" <ricorvair at cox.net>
> To: "VirtualVairs AA" <VirtualVairs at corvair.org>
> Sent: Tuesday, April 17, 2007 3:36 PM
> Subject: Re: <VV> Not really enjoying VV anymore? Vair technical content!
>
>
>> No but thanks for jinxing me.
>>
>> Would a dual MC have helped???  I put one in the wifes 63 a few years 
>> back, cause it sounded like a good idea.
>
>