seiscanecos74, et al.,
Just for fun, I ran a simplified computer simulation of your engine and got the following results for the various carburetors and throttle bodies, including a perfect one with no pressure loss at any flow.
CFM at 28" H2O, HP at 7400 rpm, sea level
No Losses.........519
1000................508
780.................501
650.................492
500.................474
How close were your dyno test results to the 9 HP gain predicted for going from a 650 to 780 Holley? I would not expect the absolute numbers to be correct, but the trends should be good.
