RE: IML: 1966 Imperial checkin & brakes

["Ken Lang" <ken@xxxxxxxxxxxxx>]

Hey all,

Just thought I'd throw my .02 in on the subject.

I've changed a couple of previously owned cars from drums to discs.  Not so
much for the ability of one over the other to lock-up the wheels.  I would
say it was more to do with braking stamina.  From 70 MPH with drum brakes
performing a hard (impending lock-up) stop, brake fade would occur before
bringing the car to a complete stop.  After which, the brakes are virtually
useless until they cool off.  The same stop with discs have no fade and
could still easily complete the lock-up of all wheels before bringing the
car to a stop if needed.

With what limited technical knowledge I have on the subject, I can only
assume it has a great deal to do with ability to dissipate an enormous
amount of generated heat.  Discs seem able to do it and drums don't.

Ken

'67 Crown 4 drht



-----Original Message-----
From: mailing-list-owner@xxxxxxxxxxxxxxxx
[mailto:mailing-list-owner@xxxxxxxxxxxxxxxx] On Behalf Of Klebert L. Hall
Sent: Wednesday, February 22, 2006 3:15 PM
To: mailing-list@xxxxxxxxxxxxxxxx
Subject: Re: IML: 1966 Imperial checkin & brakes

> From: "Dick Benjamin" <dickb@xxxxxxxxx>
> Subject: IML:  1966 Imperial checkin & brakes
>
> Interesting ideas, Dan.
>
> But, somebody educate me here, please!
>
> In physics we learned that stopping a wheeled vehicle required only that
the
> wheels be prevented from turning, and that the wheels grip the road
surface
> well enough to avoid slipping.  All that was required was that the brakes
be
> able to lock up the wheels, and that the tires have an adequate
coefficient
> of friction.

<snip>

> I have a feeling I'm missing something here - so please take me seriously
> and tell me where I'm wrong.
>
> Thanks,
>
> Dick Benjamin

   I don't know; the Lockheeds in my '62 stopped that car really well, and
whatever was in my '63 (Bendix?) did a good job too.
   Bigger brakes do stop cars faster, I think because the greater swept area
brings the car down to the 'almost locked' condition faster.

   OTOH, if somebody isn't comfortable with their braking performance, and
can gain that comfort through a brake swap, more power to them.

      -Kle.
      '69 Crown 4DHT




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