A lot of entry level and late 90's cars still use rear drum brakes. So when the ABS became standard equipment, a lot of these rudimentary units only have three valves - two for the front discs, and one for the two rear drums. The only thing that I can think of that you need to make it work would be wheel speed sensors. Usually either a hall effect type sensor or a reluctor.
On the (handful of) mid 70's Cadillacs that were offered with antilock brakes, the differential had a reluctor fitted into it as a rear wheel speed sensor. I think this method is still used, in particular with trucks, since some still use drum brakes.
I'm not familiar with the types of wheel speed sensors used out there, but I don't see how a retrofit can't be done. Like anything with our cars, it's a matter of time and $$$. Followed by the next crossroads of opinions
about a car's value in original form versus modified or modernized.
Chris Middlebrook
1962 Custom Southampton
--- On Thu 10/12, Klebert L. Hall < swampyankee@xxxxxxx > wrote:
From: Klebert L. Hall [mailto: swampyankee@xxxxxxx]
To: mailing-list@xxxxxxxxxxxxxxxx
Date: Thu, 12 Oct 2006 10:24:22 -0400
Subject: RE: IML: Imperial ABS?
> From: Crestonave@xxxxxxx
> Subject: IML: Drums to Discs
>
> This leads me to an question which I've been curious about for several
> days
> since I had to "stand on" the brakes on my 1968 Imp this past Sunday: can
> anti-lock braking be added, and is it necessary that all four wheels have
> discs
> in order for anti-locking to work?
Wow, that would be an ambitious project, indeed. Hydraulic pumps,
sensors, plumbing, a
computer to run it... I'm not going to say it's
impossible, just incredibly dificult. I don't think there are any kits, a
lot would probably have to be fabricated.
You could probably get away with just doing the fronts, considering the
wheelbase of an Imperial. Pickup trucks often only have rear ABS, since the
poor weight distribution of an empty pickup often causes the rear wheels to
lock way before the fronts.
-Kle.
'69 Crown 4DHT
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