SWEET!I think I have the calculations to do that... let me see for you.
-Des!
EDIT:
d15b2 is 1493 CC's
1 CC = 0.0610237441 CU Inch
1493 * 0.0610237441 = 91.1084499413 cubic inches
(CID*RPM)/3456=CFM
Max RPM appears to be 6800
so:
(91.1084499413*6800)/3456= 179.26431CFM at 100% volumetric efficiency
Real world engines are between 80%-90% volumetric efficiency
so:
179.26431 * 85% = 152.3746635 CFM
152.3746635 CFM is what your motor uses at 6800 RPM.