Yep, another reason why I wouldn't want a chrome on aluminum bore. and the cylinder liners are usually steel and the piston is cast iron. Good rings are cast iron running in a steel bore. Chrome rings? Maybe molybdenum coated. Moly rings break in quickly. Chrome rings do not. If the aluminum cylinder expands at a faster rate than the chromium, where does that leave the chromium?

Another fellow posted that ring gap was of little significance on a small model engine. "All large gaps do is waste much needed power in small engines." My little Enya .46 has a ring end gap of .011". Let's compare my .46 Enya to a 400c.i. Chevy V-8. Assume that both engines have a zero ring end gap amd the Enya has a .011" hole drilled through the piston crown.

* 400 divided by .46 = 870
* 870 x .011 = 9.57"
* 9.57" divided by 8= 1.20"

Could we assume that the Chevy V-8 would have to have a 1.20" hole drilled through each of it's piston crowns equal to the .011" hole in my .46?

I'm lousey in math so check me out here.

Regards,
Bill