Def Dirtydog Jr. would know what he speaks considering credentials listed above.Is this a concern based on anything real, or just a gut feeling or anecdotes? I've not been able to find anything other than "my friends cousins neighbor Bob knew a guy who said they heard...".
I did check with one of our kids. His BS is Mechanical Engineering. His MS is in Control Systems Engineering and his PhD is in Railroad Engineering. He investigates derailments, crashes trains, and blows trains up for various government agencies, that sort of thing. His current project is related to the Hyperloop Project. His reply was that surface irregularities add surface area, which is good for cooling, and also potentially add stress concentrators and crack/corrosion initiation points. But he added that he couldn't imagine any real-world circumstance in which a Jeep would be exposed to enough mud/water for a long enough time for it to have any impact. Normal wear will result in replacement long before any theoretical damage from moisture.
The brake experts at places like Baer, Willwood, and Powerstop seem to agree.
While i dont know all the science, common sense would also apply.
At some point in the years past somebody had an issue with drilled/slotted rotors.
It magically made its way through the internet and now its mostly just rumours rather
than science and fact.
Think we all have had good breaks squeak from time to time. Goes away pretty
Dirt Bikes and Side By Sides have been using drilled rotors for years . Last time I checked
they see a lot of mud, dirt & water.
The only real world negative to using a drilled / slotted rotor is the possibility of a crack
starting at one of drill holes.
That can occur on occasion not just with Powerstop. But any brand at any price. So if
Porshe. Ferarri, Brembo etc can live with that risk. Think we in Jeep world will survive