Actually I find this a very interesting thread. So if all proporting
valves/combinating valves are made for different cars, based on wheel cyl
size, weight, etc.
How can this be true (and I went to the AC Delco Site to see for my self). A
fellow list member emailed me this
We are in the process of installing the kit. We decided to go with a
combination valve from a GM car. Supposedly this would make the part easier
to find, because the same valve was used on nearly every disc/drum GM from
1973-1990. The AC-Delco part was 172-1353. Go to their website and search
for that
part, you can see just how many heavy cars was used on. From what I
understand you can use a combination valve from just about any disc/drum car
as long as the size/weight of the car is close.
I looked the part number up and it fist just about everything from a 83
Buick Regal to a 1991 3500 series (1 ton) pickuptruck.
It's pretty obvious that those vehicles are nowhere near the same size.
So explain it to me how this could be.
Nick
----- Original Message -----
From: Al Toews <al@xxxxxxxxxxxxxxxx>
To: <L-FORWARDLOOK@xxxxxxxxxxxxx>
Sent: Friday, February 15, 2002 7:59 PM
Subject: Re: [FWDLK] AAJ Brake kits
> I agree. Those elements you mentioned have to work together as a system
and
> are tuned during original design/development. Without an 'adjustable'
> proportioning valve, if your braking system stays balanced after modifying
a
> system element, buy a lottery ticket. Good luck has been with you.
> On my 60 Dart, I installed disks upfront and larger drums on the rear. The
> adjustable proportioning valve is in the line going to the rear drums. The
> knob(underneath my seat)is easily assessable and takes some pressure of
the
> drums for even stops.
>
> Cheers!
> Al
>
> -----Original Message-----
> From: Forward Look Mopar Discussion List
> [mailto:L-FORWARDLOOK@xxxxxxxxxxxxx]On Behalf Of Tom Stroup
> Sent: Friday, February 15, 2002 2:37 PM
> To: L-FORWARDLOOK@xxxxxxxxxxxxx
> Subject: Re: [FWDLK] AAJ Brake kits
>
>
> Brakes are tricky things to get to work correctly.
>
> Proportioning valves work with set parameters
> that are known by the car builders... like front
> and rear weight, wheel cylinder sizes, front disk
> size, etc. You could buy a real adjustable valve
> from an aftermarket place like Summit Racing,
> for example, and fine tune YOUR system to
> your vehicle.
>
> The fixed valves from specific
> models may not do what you wish. Check out
> a Chrysler parts book and you will find there
> were many proportioning valves, each to fit a
> certain situation. In general, you might be OK
> with what you install. It is kinda like insurance.
> All car insurance is good until you need it.
>
> At least try it out on a lightly graveled parking
> area to see which end locks up first, before you
> throw the family in and go for a highway run
> on a rainy day. The question is: If it doesn't
> work like you think it should, how will you
> fix it?
>
> Just my two cents,
> Tom 1957 Dodge in southern Ohio
>
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