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IMHO the basic issue with advanced drum brakes is complexity (i.e. cost).
Late '50s early '60s Alfas had aluminum alfin drums with diagonal fins with
cast-in steel liners and cast aluminum triple-leading shoes. That's 6
cylinders on the fronts alone.
The ATE discs Alfa and Porsche adopted provided equivalent or better
stopping power at less complexity and cost. I heard later Porsche's reason
for going with discs was cost.
As a side note, In the '70s, Phil Hill said the drums on Grand Prix cars
would go away part way through the race; in combination with burning up 60
gallons of fuel in a rear tank, this made for pretty interesting handling.
--
Steve Gerow
Altadena, CA, USA
BN6
Check out my galleries:
http://www.pbase.com/stevegerow/
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vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal>IMHO the =
basic issue with advanced drum brakes is complexity (i.e. cost). =
<o:p></o:p></p><p class=3DMsoNormal><o:p> </o:p></p><p =
class=3DMsoNormal>Late ‘50s early ‘60s Alfas had aluminum =
alfin drums with diagonal fins with cast-in steel liners and cast =
aluminum triple-leading shoes. That’s 6 cylinders on the fronts =
alone.<o:p></o:p></p><p class=3DMsoNormal><o:p> </o:p></p><p =
class=3DMsoNormal>The ATE discs Alfa and Porsche adopted provided =
equivalent or better stopping power at less complexity and cost. I heard =
later Porsche’s reason for going with discs was =
cost.<o:p></o:p></p><p class=3DMsoNormal><o:p> </o:p></p><p =
class=3DMsoNormal>As a side note, In the ‘70s, Phil Hill said the =
drums on Grand Prix cars would go away part way through the race; in =
combination with burning up 60 gallons of fuel in a rear tank, this made =
for pretty interesting handling.<o:p></o:p></p><p =
class=3DMsoNormal><o:p> </o:p></p><p =
class=3DMsoNormal>--<o:p></o:p></p><p =
class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>Steve =
Gerow<o:p></o:p></p><p class=3DMsoNormal>Altadena, CA, =
USA<o:p></o:p></p><p class=3DMsoNormal>BN6<o:p></o:p></p><p =
class=3DMsoNormal>Check out my galleries:<o:p></o:p></p><p =
class=3DMsoNormal>http://www.pbase.com/stevegerow/<o:p></o:p></p><p =
class=3DMsoNormal><o:p> </o:p></p></div></body></html>
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