Date: Fri, 3 Feb 2012 07:06:36 -0600
Reply-To: ralph meyermann <ralphmeyermann@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: ralph meyermann <ralphmeyermann@GMAIL.COM>
Subject: Re: Jaguar vs. Passat brakes on Vanagon
In-Reply-To: <BAY152-ds2010BFDB3C3D887EBD1B5AA0710@phx.gbl>
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I was thinking of a pair of willwood or outlaw 4 piston calipers and
working with my machine shop for mounting brackets them I can get a choice
of different piston diameters with those. Last I remember
1",1.25",1.5",1.75" and I think 2" as well!!
Velma 82diesel 1.6 na westy
On Feb 3, 2012 5:44 AM, "Dennis Haynes" <d23haynes57@hotmail.com> wrote:
What you really want to know is the total surface area of the piston(S)
combination. This is calculated by the radius squared x pi. A 3" piston has
an area of 28.274 cu in. Two 1.5" piston have a total of only 14.137 cu in.
With the original rotors being cast the wheel flange gets much of its
strength from the complete rotor piece. There is no way I would rely on the
wheel flange part to mount the tire with the rotor disk and hat cut off and
flange cut down to fit inside a different rotor. The threads alone are an
issue as the rotors have a defined lifespan and each time a wheel is mounted
there is some wear and distorting of these threads. Have a machine shop make
a hub from solid steel and use pressed in studs instead of lug bolts. This
will also allow the flange to be placed for proper disk alignment or wheel
spacing.
I would also consider that a major change to the front brakes should also
include a matching change to the rears. The rears contribute a lot more to
stopping than many would think. A properly working rear set up has a lot of
surface area. A real problem with the rears is that the aftermarket shoes do
not have thick enough linings and without some compensation only part of the
shoes contact the drums. I have posted a number times shimming the lower
shoe rests out the get more of the shoe to contact the drums. Also the rear
brake pressure valve can fail causing poor rear brake action. With good pads
up front and the rears working properly the stock brakes can work quite well
until you go to larger tires.
Dennis
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
ralph meyermann
Sent: Thursday, February 02, 2012 8:58 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Jaguar vs Passat brakes on Vanagon
Whats the total of piston diameters?
Velma 82diesel 1.6 na westy
On Feb 2, 2012 7:54 PM, "BenT Syncro" <syncro@gmail.com> wrote:
Chris,
At quick glance, the biggest difference is twin piston calipers for the Jag
and single for the Passat's.
BenT
sent from my electronic leash
On Feb 2, 2012, at 4:45 PM, "Chris S." <szpejankowski@GMAIL.COM> wrote:
> What's the list opinion ...