In a message dated 9/20/2007 12:40:20 P.M. Pacific Daylight Time,
mgbob@juno.com writes:
There is a firm advertising slotted rotors. These would appear to
have advantage, in that they could allow the vapors to squirt out the
slots and to allow dissipation of steam if the rotors and pads were wet.
How do slotted compare to drilled?
Could you write more about these topics?
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Both slots and holes are intended to deal with either gases trapped between
the pad and rotor, or water from the road.
Both promote cracking, sooner or later. Not a big deal on a race car as you
are tossing them out and replacing them regularly. This isn't the only race
technique that translates poorly to street use, IMO. The use of Teflon lined
brake hoses with woven stainless steel outers poses no problems on race cars
but can eventually wear through the inner plastic liner from rubbing on the
woven sheath when used for high mileages on the street.
IMHO the only way to improve this aspect of braking, without incurring
possible failure, is to use grooved discs which have a groove machined into the
face. This allows water or gas to escape without the potential weakness of
setting up a stress riser that cracks the disc. The problem of course, is
that
the grooves disappear as the rotor wears, so no one makes them that way.
Bill
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