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Dual Master Cylinder for Van
Posted by: Tommy ()
Date: November 04, 2017 10:56AM

[www.corvair.com]

Can a '61 Greenbrier be retrofitted with a dual master cylinder? Not sure about the spacing, rod/parts compatibility, etc.

Looking to step into a slightly-more-safe zone of operations with a fail-over brake setup using the dual master cylinder, like my '65 coupe has.

Thank you for the help.

:. T

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Re: Dual Master Cylinder for Van
Posted by: JimBrandberg ()
Date: November 04, 2017 11:02AM

Yes. If you take a left port MC like from a 69 Corvair it sits under there backwards with the ports coming out of the right side towards the center of the vehicle. Clarks has a kit or you can make your own lines and such.
Jim Brandberg
Isanti, MN
CorvairRepair.com

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Re: Dual Master Cylinder for Van
Posted by: Phil Dally ()
Date: November 04, 2017 11:23AM

I learned something today.

Clarks F/C duel master cylinder kits.

Including the brake lines...quite reasonable.


[www.corvair.com]

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Re: Dual Master Cylinder for Van
Posted by: Tommy ()
Date: November 04, 2017 12:04PM

Thank you Jim.

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Re: Dual Master Cylinder for Van
Posted by: RKF ()
Date: November 04, 2017 06:48PM

It's a relatively easy conversion and provides great peace of mind, especially if you replace the steel brake lines and hoses at the same time.

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Re: Dual Master Cylinder for Van
Posted by: vairmech ()
Date: November 04, 2017 07:52PM

Actually if you get the Cadillac master cylinder it has a screw down top that you can take off from inside the FC! I even think they have the ports on the other side so the lines are not against the frame rail.

Ken Hand
Handy Car Care
248 613 8586

Vairmech@aol.com

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Re: Dual Master Cylinder for Van
Posted by: Timothy Shortle ()
Date: November 05, 2017 09:42AM

I converted my 63 Rampside (owned since 1980) to a dual MC using a Clarks kit. It was a very easy install and was very affordable as I recall.
But why not just make sure your brake SYSTEM is in good proper well maintained working order? Then I feel there is no need of for a dual master cylinder "upgrade". When I say SYSTEM I don't just mean brake shoe thickness.

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Re: Dual Master Cylinder for Van
Posted by: MattNall ()
Date: November 05, 2017 10:02AM

Due to pedal Ratio differences... I don't FEEL that conversions are very useful / Safe.


Before I fell ill... I was going to convert my '66 CAR to something like this unit ..... which would be for FC's. Cars would be Firewall Mounted.
Pedal assy. only is as low as $79

[www.ebay.com]



Edited 3 time(s). Last edit at 11/05/2017 01:01PM by MattNall.

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Re: Dual Master Cylinder for Van
Posted by: vairmech ()
Date: November 05, 2017 10:24AM

You have to keep in mind that the FC master cyl is filled from inside the cab through the floor. There is NO room underneath to access the cap and fill it.

Here is the master that I mentioned.
CARDONE SELECT 131264

Ken Hand
Handy Car Care
248 613 8586

Vairmech@aol.com

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Re: Dual Master Cylinder for Van
Posted by: MattNall ()
Date: November 05, 2017 10:43AM

Ken if I were going to all the work to install the unit I pictured.... I would be more than willing to cut a larger opening and make a cover panel which would normally be covered by the rubber floormat or Carpet.





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: Dual Master Cylinder for Van
Posted by: RKF ()
Date: November 05, 2017 03:17PM

MattNall Wrote:
-------------------------------------------------------
> Ken if I were going to all the work to install
> the unit I pictured.... I would be more than
> willing to cut a larger opening and make a cover
> panel which would normally be covered by the
> rubber floormat or Carpet.

That's what I did. It was easy to enlarge the hole with a Sawzall. I then used an old license plate to cover the hole.

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Re: Dual Master Cylinder for Van
Posted by: vairmech ()
Date: November 05, 2017 05:59PM

See, I'm just not the hacking kind!

Ken Hand
Handy Car Care
248 613 8586

Vairmech@aol.com

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Re: Dual Master Cylinder for Van
Posted by: MattNall ()
Date: November 05, 2017 06:04PM

For sure!

but wait...


What about your UltraVan????? ggg





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: Dual Master Cylinder for Van
Posted by: vairmech ()
Date: November 05, 2017 07:10PM

LOL, That was unscrew a plate and make a new one! Let's see you make a new FC floor!!!! LOL agin!!!!

Ken Hand
Handy Car Care
248 613 8586

Vairmech@aol.com

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Re: Dual Master Cylinder for Van
Posted by: MattNall ()
Date: November 05, 2017 07:45PM

1/2 a licence plate is hardly a floor





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: Dual Master Cylinder for Van
Posted by: Melb-Mike ()
Date: November 06, 2017 04:45PM

Not to argue with you but I think it's adding safety by having a dual system. Should you have a brake line fail, you'll only lose half your brakes. I converted my 64 GB with Clark's dual MC. It fit great. I then replaced every brake line and hose on the unit. I made my own lines with the semi-flexible steel/copper lines and used my Eastwood professional brake line flaring tool. My GB feels like it has power brakes and stops very straight each and every time.

Mike

MattNall Wrote:
-------------------------------------------------------
> Due to pedal Ratio differences... I don't FEEL
> that conversions are very useful / Safe.
>
>
> Before I fell ill... I was going to convert my
> '66 CAR to something like this unit ..... which
> would be for FC's. Cars would be Firewall
> Mounted.
> Pedal assy. only is as low as $79
>
> [www.ebay.com]
> RAKE-PEDAL-WITH-MASTER-CYLINDERS-BALANCE-BAR/22044
> 6717697?_trkparms=aid%3D222007%26algo%3DSIM.MBE%26
> ao%3D1%26asc%3D20160908110712%26meid%3D1b94ef4dc2b
> d49518eee0287440a687b%26pid%3D100677%26rk%3D4%26rk
> t%3D5%26mehot%3Dpp%26sd%3D230353617653&_trksid=p23
> 85738.c100677.m4598



Edited 1 time(s). Last edit at 11/07/2017 03:40PM by MattNall.

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Re: Dual Master Cylinder for Van
Posted by: MattNall ()
Date: November 06, 2017 05:13PM

Mike....



open ONE bleeder.....any ONE
Tell us how far down your pedal goes...


Single cylinder cars normally have a 5 7 to 1 ratio

FACTORY Dual MC cars 7 5 to 1





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo




Edited 2 time(s). Last edit at 11/07/2017 03:42PM by MattNall.

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Re: Dual Master Cylinder for Van
Posted by: Richard ()
Date: November 06, 2017 06:55PM

There are remote reservoir master cylinders. CPP and others sell them.

Some MC's such as the 86-87 Vette MC, use a single reservoir that might match the FC floor opening. but it's a 7/8" bore and the FC is 1" if I'm not mistaken.

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Re: Dual Master Cylinder for Van
Posted by: Chi2 ()
Date: November 07, 2017 02:58PM

Matt,

What is your point? You lost me with the floor mounted assembly on eBay. Are you saying dual master cylinder conversion like the Clarks product are less safe? I'm sorry but I didn't understand the reference to ratios vs. safety.

I had a Clark's installed on my Rampy (since sold) and the brakes felt much harder and without as much feel as my Greenbrier- which has a stock single MC. I was about to buy a dual or the GB, so it would be great if you could clarify.

Thanks!

MattNall Wrote:
-------------------------------------------------------
> Mike....
>
>
>
> open ONE bleeder.....any ONE
> Tell us how far down your pedal goes...
>
>
> Single cylinder cars normally have a 7 to 1
> ratio
>
> FACTORY Dual MC cars 5 to 1

Jon
Enrolled in the Culver City Automotive School of Hard Knocks
============================================================
Member of South Coast Corsa
-1964 Greenbrier "The Dog Hauler" Rustoleum Charmer 110hp/4sp/.030 over/Pertronics I/Isky 270 Cam
-1962 Monza Club Coupe "Shaken, not stirred" Tuxedo Black with Red Interior 140hp/4sp/Pertronics I/Clark's 260 Cam



Edited 1 time(s). Last edit at 11/07/2017 03:43PM by MattNall.

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Re: Dual Master Cylinder for Van
Posted by: MattNall ()
Date: November 07, 2017 03:23PM

Chi2 Wrote:
-------------------------------------------------------
> Matt,
>
> What is your point? You lost me with the floor
> mounted assembly on eBay. Are you saying dual
> master cylinder conversion like the Clarks product
> are less safe? I'm sorry but I didn't understand
> the reference to ratios vs. safety.
=========================================================

1 Floor mount pictured... ONE pedal TWO individual MC's one for fronts / one for rears

2 I shudder when wondering where you got I said Dual Chambered MC's are "less Safe"

I SAY PEDAL travel on 62-66's is LESS...NOT ENOUGH.... to "fully" actuate the Dual MC when a line failure occurs..

How many times have we read where the pedal went to the floor and vehicle hardly slowed.... they used their Parking / Emergency brake..???

3 PEDAL Travel..... NOTE: I now think I had it backwards.... Single MC pedals "usually travel 7" to every ONE INCH of pushrod movement.

Dual MC cars...from the factory..... the PEDAL only travels 5" per 1" of PR movement.

That is why I've never converted any cars....Just MY "somewhat educated Observation".
---------------------------------------------------------

The difference you noticed on your RS was because the old single system had a problem!

When you convert your GB do the TEST I asked Melb-Mike to do and report back!





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo




Edited 1 time(s). Last edit at 11/07/2017 03:25PM by MattNall.

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