<VV> 4-Piston Calipers - Non-Corvair
JVHRoberts at aol.com
JVHRoberts at aol.com
Sat Jul 1 06:04:41 EDT 2006
Well, early GM 4 pot calipers had their problems. But pad changes are STILL
easier witht those than single piston units.
In a message dated 6/30/2006 2:39:13 PM Eastern Standard Time,
hyarnell1 at earthlink.net writes:
I remember the four piston calipers from the 60s-70s, and what a pain in the
ass they were. You had 4 times the chance of siezing a piston or leakage.
As for replacing pads, the newer GM's have only one bolt to undo on the
caliper, and the caliper pivots on the second. Slip out the old pads,
depress the piston, install new pads, and you're done.
Harry Yarnell
Perryman Garage and Orphanage
hyarnell1 at earthlink.net
----- Original Message -----
From: <JVHRoberts at aol.com>
To: <TheFreshPrinceofCorvair at comcast.net>; <virtualvairs at corvair.org>
Sent: Friday, June 30, 2006 11:30 AM
Subject: Re: <VV> 4-Piston Calipers - Non-Corvair
>
> For racing, lots.
> A 4 piston caliper is fixed, no sliding mounts. This makes sure everything
> stays square and doesn't move in unexpected ways.
> The body of a 4 piston caliper is FAR more rigid than the 'C' clamp of a
> single piston caliper, giving a FAR more firm pedal, and allowing the use
> of a
> smaller bore M/C for better mechanical advantage.
> And pad changes are a total breeze compared to most single piston
> calipers.
> Pull a pair of pins, leaving the caliper in place, pry the pistons back,
> slip
> in the new pads, stick the pins back in. On my 300ZXTT, a pad change
> takes 5
> minutes per wheel, including jacking the car up and taking the wheel off!
> Downside? They cost more. That's about it.
>
> John
More information about the VirtualVairs
mailing list