I know it’s not financially feasible at this point, but if you’re at 42% now I would love to start with an unassembled brand new engine, and do the following:
- Dry film lubed crank & rod bearings, cam lobes & followers, piston skirts & valve stems
- Oil shedding coating on counterweights and con rods and top surface of head(s) where the valve train is
- heat dispersion coating on bottom of pistons, inside-out of oil pan, valve springs, radiator, water passages in the head, and outside of intake manifold (if aluminum)
- Total Seal 1.5mm gapless rings with Napier 2nd
- heat rejection coatings on inside of intake runners (if aluminum), inside of intake ports in head, combustion chambers, valve faces & tops of pistons
- full ceramic coating on entire exhaust
Not only would this increase durability but by better controlling friction & temps, but efficiency would increase significantly due to keeping a much higher % of combustion heat in the chamber and not being sucked into the head, block, coolant and oil.
You’d probably see a 3-5% efficiency increase along with a potential 2-3mpg from napkin calculations. Of course, all these coatings would likely add $1-2k to the overall cost of the engine, which everyday people would not foot the bill for. But for people like you who drive 40k+/yr, the fuel savings would likely recoup the cost in less than 2 years.
Just a thought, lol.
