A
Anonymous
Guest
I'm trying to decide: coat the crankcase internally? Or leave it "as cast"?
Coat--The classic is GE electric motor paint (I forget the name, but Eastwood carries it), and the more modern process is an oil-shedding applied polymer coating--Polydyn Coatings http://www.polydyn.com right here in Houston has done many, many race motors, and they will be be applying this coating to the crank and rods on this motor as an anti-windage measure.
In either case, the idea is to aid oil return to the crankcase, presumably speeding oil cooling, and to seal porous areas and loose crap. Speeding return to pan makes sense, as external oil cooler(s) are part of the program. I doubt there will be any crap in this motor by the time I reassemble it, and porosity? Mmm...the block came OEM painted internally!
As Cast--Adding a coating of any sort adds an insulating layer, AND smoothes the roughness of as-cast, filling in the "valleys" and leveling the "peaks", thereby reducing the surface area and available BTU radiation area.
Thots?
Eddie
Coat--The classic is GE electric motor paint (I forget the name, but Eastwood carries it), and the more modern process is an oil-shedding applied polymer coating--Polydyn Coatings http://www.polydyn.com right here in Houston has done many, many race motors, and they will be be applying this coating to the crank and rods on this motor as an anti-windage measure.
In either case, the idea is to aid oil return to the crankcase, presumably speeding oil cooling, and to seal porous areas and loose crap. Speeding return to pan makes sense, as external oil cooler(s) are part of the program. I doubt there will be any crap in this motor by the time I reassemble it, and porosity? Mmm...the block came OEM painted internally!
As Cast--Adding a coating of any sort adds an insulating layer, AND smoothes the roughness of as-cast, filling in the "valleys" and leveling the "peaks", thereby reducing the surface area and available BTU radiation area.
Thots?
Eddie