Re: [Amc-list] Small Yard Report (9" disc brakes???)

[farna@xxxxxxx]

The biggest thing is there would be very little weight savings if the "small" rotors (assuming they do exist...) are ventilated. Probably not more than a pound. Most of the weight is in the hub and caliper. 

--
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Publisher, "American Motors Cars" 
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 -------------- Original message ----------------------
From: Mark Price <markprice242@xxxxxxxxxxxx>
> I mentioned the small discs as being a possible good choce for easy bolt on 
> light weight discs. It's been a few years back.
>    To put it mildly I was told I was crazy and no such things existed..........
> --
> Mark Price
> markprice242ATadelphia.net
> Morgantown, WV
> 
> 
> ---- farna@xxxxxxx wrote: 
> > Joe, would you measure those things next time you're out that way? I've never 
> heard of 9" rotors. 9" rear brakes on the 78-80 four cylinder cars (81-83 all 
> but wagons), but not a smaller rotor. The six and V-8 cars used a 10.82" rotor, 
> and I was under the impression that the 80-83 four cylinder cars used the same 
> brakes (not the first time I've been wrong...). I know the 77-79 2.0L four 
> cylinder cars used the same diameter rotor and the same caliper, but the rotor 
> was solid, not ventilated. The pads had a thick spacer to make up the 
> difference. 
> > 
> > I just looked on Rockauto.com. The four cylinder definitely uses a different 
> rotor! I'd sure like to know the actual diameter if someone has one. The only 
> thing 80-83 TSMs list is thickness and run-out, no diameter. Makes sense, 
> diameter doesn't change with wear! But I sure do like all the extra specs in the 
> older TSMs.
> > 
> > --------------------------
> > Date: Sat, 24 Feb 2007 12:45:46 -0800 (PST)
> > From: JOE FULTON <piper_pa20@xxxxxxxxxxx>
> > 
> > A-1 Auto Wreckers has an 80 concord 2-door sedan with
> > 61,000 miles.  4 cyl (Iron 49-state Iron Duke)/auto
> > tranny.  Has the tilt column and a very clean dark
> > brown interior.  The little 9-inch disk brakes (4-cyl
> > cars had these) are in very good condition and might
> > be a light weight alternative for a drag car.  
> > 
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