Dave, I converted my amphi to dual circut brakes by accident. I asked the local foreign auto parts store to order me a master cylinder using the part number posted on the club website parts interchange list. They told me that the dual circut master cylinder that they gave me was the 'superceded' part. It bolted up perfectly. I had to buy two 6" brake lines with couplings and another(dual) fluid reservoir to make it work. Front brakes on one circut ,rears on other. I use silicone fluid. I've lost my brakes completely twice, once when a rear metal brake line split and once when the original master cylinder blew out. Thrill ride. With this dual setup, at least I have a second chance. I tore the part number off of the new cylinder box to save it, but have since lost the number. .sorry. Best Regards, Mike in N.H.
Greg,
Most VW bugs, buses and transporters in Europe used dual circuit brakes from about 1965, a development of a system that was near identical to Amphicar. I'm sure they were only ever diagonal - that's the design at least one of the German Amphicar owners fitted.
Google vw dual circuit and there are loads of articles.
It is probably pretty easy to have dual circuit front and back as the original brake lines should fit and would certainly be better than no brakes at all but not as good as diagonal - however I've never seen hydraulic brakes split front and back - but then I've never worked on American cars !
The Chris Longhurst article on brakes is a great resource to learn more but it's really European with only a few words changed to American.
Car Bibles : The Brake Bible
David C
----- Original Message -----
From: gzink
To:
david@manbus.com
Sent: Saturday, August 30, 2008 5:17 AM
Subject: RE: [General Amphicar Discussion-t-20134] Dual Circuit Brake Conversion
David,
None of our U.S. cars do the diagonal. All of ours are front in one chamber and back in other so I would appreciate your posting if you know a vehicle with dual chamber that has been used and will work
Greg Z.
--- On Wed, 8/27/08, DavidC <> wrote:
Quote:
> From: DavidC <>
> Subject: RE: [General Amphicar Discussion-t-20134] Dual Circuit Brake Conversion
> To:
g_zink_us@yahoo.com
> Date: Wednesday, August 27, 2008, 10:37 AM
> Quote:
>
>
>
>
> > Has anyone looked into using a late model VW
> Transporter master cylinder
> > (or other) to convert the single circuit Amphicar
> brake system to a
> > Front/Rear dual circuit system?
>
>
>
>
> Yes, it's been done a few times but certainly in Europe
> it would be ilegal
> to split front/back, you have to do it diagonally so quite
> a lot of new pipe
> work is needed.
>
> David C
>
>
>[/quote]