[Henry Schmidt]

This thread speaks primarily to the effectiveness of the Solex cam and for a early clean sheet of paper, it was a great starting point.

That said, I have been building what we call a 2450 (70.4 x 86mm) the the formula was/is 9.5:1, 40mm Weber, 36mm intake ports, sport muffler, stock heater box exhaust and Mod "S" cams.
Of course all of our engines are built using modern techniques such as dry film lubricants and top quality bearing but there is no other magic. On the chassis dyno these
little engines make 180 RWHP and 6650 rpm. They tend to start pulling hard in the mid 2 thousands. Those kind of number will never be achieved with a stock "S" cam.