Either way it is NOT energy conversion efficiency.

Also I think it to be unfair to compare supercharged and injection diesels and sport engines with plain family car engines without these gadgets and still using carbirators.

The "stale air" problem just as much impacts on non supercharged diesels as it does with non-supercharged gasoline engines. And ofcourse the same solution can be had with gasoline engines.

Point in case the superbike engines, not many are used diesel engines right ?

Basically what you doing here is confusing a whole lot of people with basically junk science.

This may well be unintentional but ....

Wouter