BMFC, Tiiming, and Coatings

[The Punisher]

>here's a thought, has anyone ever given any thought to painting the inside
>of an engine ? before you hit delete, consider how easy it is for dirt etc
>to stick to the inside of the block, under a microscope the surface must be
>like velcro. I suspect oil would return a little quicker to the pan. just a
>thought, you can flame me now.
>

I paint ALL My engines that I build. I DO NOT use standard engine paint for 
the inside however. I use electric motor insulation paint, the stuff they 
paint the windings with. It is very tough and maintains a slick surface even 
after several years of use. The oil in my engines just run off the stuff and 
hardly even leave any film behind. They usualy have this stuff at electric 
motor rebuilding shops. I have used it on the exterior too, but it does not 
seem to have the same durability. I have NEVER yet seen any signs of peeling 
or flaking inside the engine.


>Has anyone run any "independent" testing on these barrier coatings for what
>they actually have seen as an improvement pre+post coating?.
>   Has any one run any endurance tests?.
>Do I need mention that this might need a complete recal to get right.
>Bruce
I have also used thermal barrier on piston domes,combustion chambers, valves 
and exhause ports. It sure seems to work for me. I have built some small 
blocks that were similar but the ones with the thermal coatings seem less 
prone to detonation. Another advantage (especialy on the street), is the 
piston expands less, therefore you can run a tighter piston/bore clearence, 
which means less blow-by,less wear, less leakage which all adds up to a 
better engine.


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