Re: [Amc-list] 10 inch drums

[Tom Jennings <tomj@xxxxxxx>]

The parts stores are largely wrong; AMC had 10" brakes on the V8's all
along. Don't know how early (I just don't ahve the data) but definitely
62 up.

I just mocked up 64 Ambassador 10" brakes on the 63 American. The sole
problem is steering arm/tie rod clearance.

With tall AMC spindles, a small notch in the backing plate edge (the
dust seal) would clear it. The problem is that the drum's outside flange
solidly hits the tie rod end.

I now have one of every drum brake size AMC ever made (backing plate,
drum, shoes, some wheel cyls). I took photos and measurements, and I'll
be making a brake interchange page.

Anyways I will talk to C H Topping (Long Beach CA) about this
predicament. I bet they can either find me a drum, or tell me if cutting
the outer dust seal lip is totally crazy or doable.

To be honest, I'm probably going to bolt on the 9x2.5" brakes from Jim's
Gremlin. That's a no-brainer and a lot more brake surface. That plus
good quality shoes and drum drilling will be fine. But I'll persue the
10" thin because it's got the Cool Factor, besides being kick-ass good
brakes for that little car.

But I have other woes...




On Sat, 2007-06-23 at 14:00 -0400, Jay wrote:
> I have been interested in replacing the 9 x 2.5 inch drums on my 66 American 
> with some 10 inch drums. I went to Rockauto and every year Ambassador up 
> through 1969 has the 9 x 2.5 listed as standard brakes on the car. Heck, my 
> American has  9 x 2.5 inch brakes on the front as standard. What year did 
> AMC switch to 10 inch drums?  I might do just as well putting a power brake 
> booster on my car and let it go like that. my brakes stop pretty well, they 
> just require a lot of leg pressure. Guess I am just too used to PB in all my 
> other cars.
> 
> Jay in FL> 
> 
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