[quoteI've found that on the type of motors I build (moderate perf motors) that 2 hp per cfm is a good rule of thumb.



This was real close to what my engine made.Dwayne flowed my SR`s as they came from MM they came in at 309cfm with a std port opening. When it the dyno the result was 617hp.

PRH446
10.084 @ 135.21 mph N/A through chambered mufflers,3300lbs. Stock stroke wedge