That wouldn’t explain new heavy suvs getting better mileage than slightly old sporty cars, aerodynamics may though.

Luxury is relative, remember a closed roof was a luxury at one point.

Your forgetting about females higher body fat compared to men of equal height frame and muscle mass.

A lightly used early 2,000's Mustang with minimal bloodlust and a new outfit from Factory Five Racing.

What year is it? It’s not like no one has done a k swap in every civic ever or anything.

Today

A ‘96 1100 would of been water cooled.

Sounds like you’re pointing out design flaws?

Comparing drag coefficient without mentioning frontal area is like trying to compare peoples weight without knowing how tall they are!

You mentioned compression related difficulties several times, wouldn’t removing a spark plug eliminate that?

Forget which video it was, but I believe it featured the guy in charge of the cooling for desert racer and he said something along the lines of the need for cooling accounts for a third (?) of a cars drag, and drag uses up most the power at any point, so more people need to focus on more efficient cooling as a means…

That’s not how I would define stripped out interior.

Saw one of his bikes at the 1moto show years ago, never heard about him or the bike before it so I just thought it was some sort of eastern European buotique racer or something, much later I saw that charged doc and appreciated what he created.

Because every running donor engine always needs rebuilt after you unbolt it from the frame? Nevermind the fact that buying a kit and a donor is practically factory fives entire business model.