<VV> Corvair Master cylinder

[Ron]

I've been using DOT 5 for many years in my Corvairs and an Ultra Van with 
absolutely none of the problems that you mentioned.  The fact that I live in 
a relatively dry climate may be a factor.
RonH

----- Original Message ----- 
From: "Bill Elliott" <corvair at fnader.com>
To: "D. Barry Ellison" <bars84crx at hotmail.com>
Cc: <virtualvairs at corvair.org>
Sent: Thursday, May 15, 2008 2:10 PM
Subject: Re: <VV> Corvair Master cylinder


> There are loads and loads off reasons not to use it (though many people
> use it successfully). It's optimal for a trailer queen, but suboptimal
> for a driver. The two attributes that cause issues are its
> compressibility (low pedal, sometimes no pedal, poor feel and
> modulation) and its inability to absorb water (while it does not attract
> water, any water that does find its way into the system will pool at the
> cylinders and flash quickly to steam under only moderate heat... see "no
> pedal" above)
>
> Anyone that does use it for a driver should VERY carefully keep the
> shoes adjusted (with the compressibility you have very little safety
> margin on the system volume) and at least bleed the system every couple
> of years. However, as I said, many Corvair drivers use it successfully
> but many others have had serious issues.
>
> IMO a much better option for drivers are the fully synthetic DOT 3/4
> glycol compatibles fluids (DOT 5.1 though you won't see them marked like
> that due to confusion)... temperature handling as good or better than
> DOT 5 silicone, no compressibility, low moisture absorption, and less
> paint damage than DOT 3/4)
>
> For trailer queens/Sunday drivers, the brake wear and moisture entry are
> less of an issue and there most people feel the silicone advantages
> outweigh the negatives.
>
> Bill
>
> D. Barry Ellison wrote:
>
>>But Seth... why wouldn't they use it?
>>
>>I've heard that as well, and I see no reason not to.  I have it in my 
>>black car, and I drove it every day the last two weeks (although it sat 
>>for 4 months).  I will have it in the black car in July at Indy I hope if 
>>fuel prices don't double again.  The fluid ain't 'changing to be 
>>changing'.Barry in SC > But as of late, I don't know any racers who will 
>>use it in a > car THEY have to drive (humor). Of course, racers may change 
>>fluid, or bleed > it, more often than the normal driver.
>>
>>
>>
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