Re: [Amc-list] disk brake hack

[Wrambler242@xxxxxxxxxxx]

Cool, looks like a 72 Gremlin has 13/16" rear cylinders and 9X2" drums.
One step smaller than the stock 7/8" American cylinders.
I'm not sure how long it'll be before I pull the axle out though, but still worthwhile info...

--
Mark Price
Morgantown, WV
1969 AMC Rambler, 4.0L, EFI, T-5
" I was different before people dared to be different" 

 -------------- Original message ----------------------
From: Tom Jennings <tomj@xxxxxxx>
> On Sat, 2007-07-21 at 06:42 +0000, Wrambler242@xxxxxxxxxxx wrote:
> > I looked at WPS.com. I couldn't find the brake list?
> > Whassup?
> > Proly just me!!!
> 
> It's just a temp location, no link to it,m I need to format it then move
> to amcylcopedia
> 
> 
> http://wps.com/AMC/AMC-brakes.html
> 
> 
> 
> 
> 
> > --
> > Mark Price
> > Morgantown, WV
> > 1969 AMC Rambler, 4.0L, EFI, T-5
> > " I was different before people dared to be different" 
> > 
> >  -------------- Original message ----------------------
> > From: Tom Jennings <tomj@xxxxxxx>
> > > On Fri, 2007-07-20 at 16:22 +0000, Wrambler242@xxxxxxxxxxx wrote: 
> > > > I got to ask, Were would you look to find smaller wheel cylinders???
> > > 
> > > >From the grand unified brake list! I already did this on my Hornet; I
> > > got perfect balance by changing to a smaller rear bore. All along I
> > > suspected that there really are very few drum brake parts. Here's what
> > > I've found:
> > > 
> > > * AMC used 10x2.5, 10x1.75, 9x2.5, 9x2
> > > * The hub front or rear does not seem to change EXCEPT for center hole
> > > diameter some years
> > > * four drums would fit all cars EXCEPT there are variations in center
> > > hole diameter some years
> > > 
> > > 
> > > * For a given SHOE WIDTH, all the wheel cylinders interchange, pending
> > > port location (center, front or rear; front brakes have to put the port
> > > to one side of the steering knuckle, is all). YOu can use front wheel
> > > cyls in the rear if you don't mind bending brake lines.
> > > 
> > > (The only difference between a 1" bore wheel cylinder for 2.5" wide vs.
> > > 2" wide shoes is the height of the bore centerline from the mounting
> > > surface, so that it contacts the foot on the shoe).
> > > 
> > > 
> > > 
> > > To tweak the rear wheel cylinder bore diameter, for say a 9x2.5" brake
> > > first figure out what you have now, then rummage through the table for
> > > other 9x2.5 rear brakes and see what other cyls are used. You can do
> > > this without the chart; the data's in the TSMs, but I compiled it all in
> > > one place.
> > > 
> > > Once i fill in the blanks in the table I will do the complete
> > > cross-reference. That's really the POINT of the project. The big listing
> > > is nice, but it's not new data. Tabulating every possible AMC wheel
> > > cylinder will be new information. For example, I can list wheel
> > > cylinders by bore x shoe width x port exit location x part number and
> > > just go shopping. 
> > > 
> > > 
> > > There's certainly bore diameters that AMC didn't use that would be
> > > useful. But knowing how few wheel cyl parameters there are means you can
> > > pick non-AMC parts that will bolt in, exact fit; find other-make with
> > > 9x2.5 bendix brakes, check port location, bolt it in.
> > > 
> > > 
> > > _______________________________________________
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> > > http://www.amc-list.com/mailman/listinfo/amc-list
> > 
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