I installed a set of slotted/drilled rotors on my father's '69 2000 last
year and they work fine. I'm not sure about increased performance, but
they weren't that expensive and despite some hard braking, they haven't
cracked yet. They were made by an Australian company that specializes in
cross drilling and slotting rotors, and were purchased through one of the
roadster vendors. I wonder if they would care to join in this discussion?
Pros, cons?
Alex
At 05:14 PM 2/9/01 +0100, Thomas the Swede wrote:
>Drilling stock rotor castings is a waste of time. They crack
>because most cast iron material used isn't suitable for drilling.
>The more $$$ drilled rotors are cast in a different material
>or they usually are. Drilled rotors make's a noise similar to
>a big truck when braking. Slotted rotors clean the pads but
>makes less noise than drilled. The slots dont cool the rotors.
>
>Thomas
>
>datsunmike wrote:
>
>> Rob,
>>
>> In Grassroots there was an article re: drilled/slotted rotors. They said it
>> is a waste of $$$$ and from what I gather from other sources the drilled
>> rotors, except the $$$$ ones, are, for the most part junk - Radial stress
>> cracks and broken rotors. Slotted is better but doesn't improve braking. As
>> stated in the article "gassing" is no longer a problem with the pads made
>> today.
>>
>> Ventilated rotors are better.
>>
>> Mike
>>
>> ----- Original Message -----
>> From: "R Haug" <haugchiro@moscow.com>
>> To: <datsun-roadsters@autox.team.net>
>> Sent: Friday, February 09, 2001 8:50 AM
>> Subject: drilled and slotted rotors
>>
>> > List,
>> > I am considering replacing my standard rotors with the drilled and
>> > slotted rotors for my 67.5.
>> > Has anyone used these on the street?
>> > If so, is there much difference in braking with these as compared to to
>> > standard rotors?
>> > Is there any increased or decreased noise?
>> > I would think there may be an improvement in fade resistance.
>> > Maybe a slight decrease in unsprung weight.
>> > Anything else?
>> > Bob
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