There's a rule of thumb that says, "For any given displacement, and with all things being as equal as they can, the more cylinders an engine has, the more power it will make."
This is the rationale behind the 4-cylinder bikes having to pull more weight per cubic inch, than the 2-cylinder bikes, right?
I understand that much... and, NHRA's efforts to create parity between the two types of motors by requiring different weight breaks between the two.
What I do NOT understand (and, maybe someone who DOES, can explain it in such a way that I can understand it), is the contention that "bad air" hurts one engine design more than the other.
Why is that? They both have 4 valves per cylinder, (I assume), and horsepower production is all about cylinder-filling and BMEP, so why would a smaller engine with 4 cylinders, suffer more than a large one with two cylinders?
Anybody have a clue why this is true, IF indeed, it really IS true?
I don't have a dog in this hunt, but I'm curious. Any information will be appreciated.
Bill