Polishing Rotors - Pros and Cons

[RETed]

Originally Posted by NoDOHC

By polishing the rotor I not only increased the heat rejection (think shiny handles vs. black handles in the sunlight) but I also minimized the possibility of localized hotspots (due to uniform surface finish, no protruding surfaces to absorb heat).
(lugs to 300 rpm, no problem and will actually accelerate from there).

I doubt this is the case...
I bet the rotor faces are already black with soot and carbon deposits.
You'd be surprised how well deposits after combustion will stick to surfaces.
Since this is a rebuild, the engine would've been burning inefficiently due to inferior compression from the seals settling in.
This is more than enough time to leave a fine layer of soot on the rotor faces.
Too bad we can't tear the motor down just to confirm this...


-Ted