Aluminium Flywheels

hi, the RPM drop between gears is dictated by gear ratios in the trans. the flywheel is not a factor. at 3000 RPM, flywheel effect comes into play, heavier will spin tires lot easier. if your spinning tires, your loosing the race!!
also, higher RPM, makes more H.P. I been driving and racing stick cars since 1964, I am a stick shift racer. I have seen a lot of different combo,s over the years. back in days of modified elim, the chevs ran a 40 # wheel, small inch motors and lots of weight. heavier was needed to get car moving. in a regular, type car, the lighter wheel works better. just food forthought.