BMFC, Tiiming, and Coatings

[FHPREMACH at aol.com]

In a message dated 5/16/99 9:12:57 AM Pacific Daylight Time, 
nwester at eidnet.org writes:

<< I have no faith in some kind of coating--just like I have no faith in 
Teflon
 additives...instead of coating the undersides of pistons, or coating the
 interior of an engine--polishing the interiors smooth would have a greater
 effect of oil return, and less oil "dwell".  As far as piston ring
 manufacturers go--gapless piston rings and improper end gaps will always
 yield differing results. You can make anything look good on a
 dyno--depending on operator.
 
 Lyndon IPTECH
 -----Original Message----- >>
Hi,
 I just wanted to add a bit to this idea. most research has noted that the 
"Leave it cast and paint it black" ideas of long ago still hold true. Oil is 
a strange beast at times. you want to cool it and drain it to the sump, but 
as it cools, it slows down the drainback. Rough surfaces increase the surface 
area and increase cooling. As for teflon, the jury is still out on the 
longterm results. Polishing the interior of motors has come in and out of 
use. and at one time, polishing the entire crankcase, crank, rod, and filling 
the balance holes in two strokes was supposed to lead to increased 
horsepower, but like stuffer plates, it seems to have lost favor. Coatings 
seem to come in and out of fashion. I do believe in coatings for certain 
areas, but am still looking into a couple of unorthodox ones. I will give 
results as they ocur. 
BTW, has anyone tried the carbide cylinder bore treatment that was in the 
threads a few months ago? I wondered about that with a Hard Anodized piston 
skirt might affect wear.
Fred