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PostPosted: Wed Oct 09, 2013 2:11 pm 
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Pacer
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check this web page, third one down...

It looks almost exactly like the P-valve I took off a 4 door Eagle in a salvage yard in British Columbia.

http://www.wilwood.com/MasterCylinders/ ... alves.aspx

Anyone know if it would fit off-hand?

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PostPosted: Wed Oct 09, 2013 10:32 pm 
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I didn't look at the page, but I will say this on prop valves.

our eagles use a gm style prop valve. just because it looks the same, doesn't mean it is. that same valve was used on so many different cars. anything from small light "econo boxes" like vegas, chevettes, ect, to the huge caprice, and 1 ton trucks. the springs inside are what are different to get the correct proportioning of front/rear pressures. put a valve on your eagle from a 1 ton chevy truck. it will go right in as its the exact same body. there will be NO real proportioning effect going on as the 1ton would have much bigger brakes, and much more pressure, and the rear brakes probably wouldn't even get used with that valve. I went thru all this crap building my custom brake system on my 62 rambler. its a PAIN IN THE BALLS!!! need enough pressure to make the rears lock AFTER the fronts. you don't want the rears to lock before the fronts, because it will want to swing around, but you want the rears to work.

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PostPosted: Wed Oct 09, 2013 10:55 pm 
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That's why I go with adjustable then use a wet smooth surface for panic stop testing.

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PostPosted: Sun Oct 13, 2013 5:26 pm 
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FYI, a similar era midsize gm car (malibu, cutlass, regal, montecarlo, grandprix/am) have similar sized brakes and weight as Eagles, may be your best best. That or a late 80's cherokee has the identical brake system as an 82? (whenever they went to low drag brakes) and newer eagle.

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PostPosted: Sun Oct 13, 2013 10:19 pm 
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good to know, thanks Shagg.

I think the one I got for the eagle was already upgraded from a chev type. I've been looking for P-valves on line, and the same one keeps coming up.

The eagle I took it from, must have already been upgraded to the chev type.

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PostPosted: Sun Oct 13, 2013 11:03 pm 
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Hornet
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I looked on honeybadger lastnight. interstingly, it appears to be one like a gm style prop valve, but does NOT have that little stem that moves. weird.

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dave

WHEN IN DOUBT, BUY MORE BEER!!!!

ASE cert. mechanic 15 years.

http://www.picasaweb.google.com/das24rules

62 rambler classic (casper)
63 rambler american (rosie)
82 eagle sx4 (honeybadger)
82 eagle sw (rottywagon)
79 spirit (drag race car)


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PostPosted: Mon Oct 14, 2013 10:01 am 
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Whuntmore wrote:
good to know, thanks Shagg.

I think the one I got for the eagle was already upgraded from a chev type. I've been looking for P-valves on line, and the same one keeps coming up.

The eagle I took it from, must have already been upgraded to the chev type.


I'm pretty sure every AMC Eagle has the same unit, which is a common chevy unit. The spring might have changed along with the caliper change, but probably not.

When he said "low drag" brake change, I think he meant that the calipers changed. 1980 and 1981 Eagles only have a different caliper than the later ones. The later ones have pins with allen heads that screw into the casting and the calipers move along the pins with much less resistance than the earlier ones that just slid along the casting. I actually prefer the older ones because I've encountered several of the newer ones that were too corroded and rounded off at the pins to remove. You're basically screwed and stuck swapping the whole spindle if that pin gets stuck. The older ones are much easier and faster to pop off and on as you do maintenance. The older calipers work just as well as the newer ones if you remove one of the two tensioners and use copious amounts of neversieze to keep it smooth, rust free, and lubricated.


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