Drums vs. Disc: was Re: rear camber problems??

[jdbubb@ix.netcom.com (Dan Bubb)]

Well, rear drums may be lighter than rear discs, but since a large
amount of the drum's weight is on the outer perimeter it's rotational
inertia may be larger. Rotational inertia is a function of weight X
radius^2, so all the weight of the drum at the perimeter bumps up its
rotational inertia despite a potentially lower overall weight.
In any case, whether considering just weight or rotational inertia, the
difference between drum or disc is probably less than .1% of the total
car and probably insignificant.
Dan

Kenneth & Georgianna Robinson wrote:
>=20
> How MUCH less rotating weight is a drum vs. a disc??? This is important=
 to
> me.......somewhat.I may convert to drums if it's significant.Ken R.
> ----- Original Message -----
> From: "L F" <rocco16v@netzero.net>
> To: <pbureau@attbi.com>; "Shawn c Meze" <skerocdriver@juno.com>
> Cc: <scirocco-l@scirocco.org>
> Sent: Tuesday, October 08, 2002 7:02 PM
> Subject: Re: rear camber problems??
>=20
> > drums are lighter than discs and have more than enough power/enduranc=
e on
> > our lighter vehicles.
> > Drums are not as cool, however.
> >
> > Larry
> >
> >
> > ----- Original Message -----
> > From: <pbureau@attbi.com>
> > To: "Shawn c Meze" <skerocdriver@juno.com>
> > Cc: <scirocco-l@scirocco.org>
> > Sent: Tuesday, October 08, 2002 1:10 AM
> > Subject: Re: rear camber problems??
> >
> >
> > > better yet, get a 16v conversion and change them drums
> > > for disc brakes while you shimming it out :)
> > > --
> > > =3D=3D=3D=3D
> > > ATS - Patrick Bureau
> > > 1985 8v Euro GTX 3A/JH Project
> > > (show car)
> > > 1985 8v Euro GT Project (Daily Drive)
> > > http://www.longcoeur.com/scirocco/
> > > http://www.texassciroccoteam.org/
> > > >
> > > >
> > > > On Fri, 4 Oct 2002 13:46:00 -0500 "ATS - Patrick Bureau"
> > > > <pbureau@attbi.com> writes:
> > > > > Yes you can buy shims to set the camber right, a real pain in t=
he
> > arse,
> > > > you
> > > > > have to take the stub axle off, insert shim reasse,ble entire b=
rakes
> > > > system
> > > > > back on the axle, and re-align...alignment shop usually charge
> > anywhere
> > > > from
> > > > > 200-400$ because of the pita it is.
> > > >
> > > >
> > > >
> > > > no-no-no. Its actually fairly easy. remove the drum, remove 4 bol=
ts
> and
> > > > you can pop the backing plate and spindle out enough to shim it. =
The 4
> > > > bolts arent exactly right there as you have to fight to get them =
out
> but
> > > > they do come out without total dissassembly. Assembly in reverse =
of
> > > > removal. Dont forget to brake clean everything before the drums g=
o
> back
> > > > on.
> > > >
> > > >
> > > > Shawn M=E9ze
> > > > 86' Jetta GLi 8V   88' Corvette -SS- #30  2001 SDR Solo2 Champion
> > > > Scirocco" 84' Scirocco 8V 82' Scirocco RIP 80' Scirocco S 79' "Pr=
oject
> > > > FSP
> > > > The Fastest, Quickest, Cleanest and best looking Scirocco(s) in a=
ll of
> > > > San Diego!
> > > > http://www.Geocities.com/MotorCity/Speedway/1308/index.htm
> > > >
> > > >
> > > >
> > > > ________________________________________________________________
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>=20
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