Interesting to note, David Vizard claims that the tests he has done confirm that a bigger balancer makes for a faster car in the quarter mile, although I don't think he explained why. One would think that a smaller balancer makes for a lighter rotating mass and that would be better... My theory is that the crank is producing so many harmonic vibrations at the high rpm levels that a bigger balancer helps absorb them better, thus allowing the engine to spin more freely giving either higher rpms and/or more horsepower from less friction.
What I just said may NOT be true, but I like thinking about this stuff
Anyone that really knows what & why, please clue me in.
Davy