mgb-v8
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Re: Calipers

To: Jarl&CaroldeBoer <deboer@pacbell.net>
Subject: Re: Calipers
From: Paul Hunt <paul.hunt1@virgin.net>
Date: Mon, 20 Jul 1998 20:34:18 +0000
Cc: "KILE, PAUL D" <Paul.Kile@Aerojet.com>, mgb-v8@Autox.Team.Net
Organization: I.T. Answers Ltd
References: <EDA05BE5C3D2D011AB4B00A024E9B822C2B70E@apd-exch01.aerojetpd.com> <35B356EC.2D3E@pacbell.net>
Reply-to: Paul Hunt <paul.hunt1@virgin.net>
Sender: owner-mgb-v8@Autox.Team.Net
Jarl&CaroldeBoer wrote:
> 
> Paul,
> 
> You're absolutely correct on that 45 percent circumference cut-out being
> an anti squeal device. I remember receiving a factory service bulletin
> in late MGA/MGB times, (around 1963) that strongly stressed the correct
> orientation. There was also a later one that warned of the dangers of
> "mix-and-match". Lockheed made the "improvement" to save money on that
> one machining step, but the notches work better / are quieter than the
> shims. I always just made a quick pass with the mill to "fix" the
> notchless pistons when I had them out for seal replacement. That took an
> extra 5 minutes and my customers appreciated the peace and quiet.  Jarl
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~`
> KILE, PAUL D wrote:
> >
> > Paul H.,
> >
> > I believe the original purpose of the cutouts was to prevent brake
> > squeal.  If so, it would make sense to me to orient the cutout toward
> > the trailing edge of the pad.  This would have the effect of "toeing in"

Jarl, PaulK, thanks for the comments.

The last couple of sets of pads I have fitted didn't come with shims so I have 
been transferring them from set to set.  One of the BBSers seemed to be saying 
that the shims should still be fitted with the pistons with cut-outs, but that 
would seem to be 'belt and braces', comments?

Cheers both,
PaulH.



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