928sRus WINTER SPECIALS - X Drilled Rotors & Ignition Parts
#18
Rennlist Member
From what I see at the track..doesnt make a difference.
Its lost surface area for friction, and they'll still crack at the outside edge if you heat shock it enough..and its lost mass to manage braking energy with.
My two cents..just my opinion...and I pull a lot of snapped rotors and the cars bolted to them from tirewalls in my weekend job.
#19
Rennlist Member
Rotors cool the best by using the airpump built into them, and also FORCE feeding it..all sealed up at the hub, not just pointing more air to them. The volume of air you move thru a device to cool is provide very large returns, drilling doesnt do that. IMHO, it reduces the efficiency of the heat pump, that rotor veining is.
#21
Rennlist Member
Ever notice the inside of a wheel is dry after driving in a heavy rain? And that the rotor is always turning..which spits off -any- appreciable water, and any super duper thin layer left..evaporates on contact with a rotor that is almost always in the 100-150d range during steady city cruise (bearing heat, latent heat from last braking, sliiiightly dragging pad..). At highway cruise..just the speed, airflow, and centrifugal force alone has that sucker dry as a bone.
Hitting a hard puddle, isnt gonna wet a rotor. Parking in it...sure, a VERY VERY deep one. Splashed rain while parked..sure...but not while driving.
Drill & slotted, still more lost mass, lost surface area (friction = braking, less = less) and sure looks pretty, but overkill to do both, IMHO.
And the gassing thing...brake vendors tell you that, but ask em which pads gas, and which dont. I havent gotten a list of those from anyone yet..again, 100% my own opinion. The most efficient rotor is left whole...as a friction surface and as a heat sink.
I got a huge laugh, from the BMW commercials a few yrs back, advertising that "during rain, we apply the brakes lightly to keep them dry"...wow.
#22
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Judging by how many sets of drilled (Cast) v solid we sell the solids are in the BIG minority.
Had them on my GTS a long time and no issues at all. They look the "Dogs Bollocks".
Had them on my GTS a long time and no issues at all. They look the "Dogs Bollocks".
__________________
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission? George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission? George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
#25
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Jeff,
Plain Zimmerman 82 to 86 $330 for the set of 4.
Rears by Sebro (OEM Porsche) brings the set price down to $290.
Roger
Plain Zimmerman 82 to 86 $330 for the set of 4.
Rears by Sebro (OEM Porsche) brings the set price down to $290.
Roger
#29
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Hey Guys - I am trying to sell parts and really did not want to start a discussion on the pro's and cons of Drilled v plain rotors.
Any chance you could start another thread to discuss the topic please?
Any chance you could start another thread to discuss the topic please?
#30
Damn! Just when my popcorn just finished popping. I was ready to settle in to some serious discussion reading.
Roger thanks for posting your Winter specials.
I will call or email about what I am interested in.
Did you see my '928sRus shirt' thread?...:
https://rennlist.com/forums/928-foru...d-my-life.html
I owe ya one, Buddy! Thanks for the body armor!
(Post a comment there if you're not too busy with inventing the next product to save the world.)
Allen
Roger thanks for posting your Winter specials.
I will call or email about what I am interested in.
Did you see my '928sRus shirt' thread?...:
https://rennlist.com/forums/928-foru...d-my-life.html
I owe ya one, Buddy! Thanks for the body armor!
(Post a comment there if you're not too busy with inventing the next product to save the world.)
Allen