F-427 and RPM

[hotrodfeguy]

I think Bill's 390 is a perfect example of a F-427 would shoot you in the foot. HE MADE, 438-443 hp from 5600-6200, and 448-454 lbs ft from 3700-4000 with a 270s cam SD intake. now I think if you put that beloved F-427 on there it would not show such nice numbers on that 390. Just a hunch, But I am just a redneck with a flowbench and a few machine centers. Who happens to know how to weld cast iron.  It's better to be lucky than good I guess.

[Faron]

Having worked with Blair Patrick for a bit , and learning new things ( never too old to learn if your smart )I have see great power numbers from combos that most think would not happen , Not sure how a PI intake compares to a F427 , but I bet its close ( on a flow bench ) but like I said nothing is a given , Numbers ( flow ) are only part of the deal , a PI intake on a 390 ish motor making 530 + power , its not just an intake , the rest all factor in IMHO   

[TomP]

I actually swapped from an F427 to a Performer RPM on my ramp truck which i also raced.
 It made a huge differnce at low RPM and still made better top end. A dyno won't tell you anything about driveability testing at full throttle.  Going up a hill and not having to downshift in a 9500 lb truck easily shows the Perf. RPM advantage.
 Because of the truck 4 speed's really wide gear ratios i'd have to wing the stock, unrebuilt 428 bottom end to 6500 so it didn't fall off too badly in the next gear. 6500 was worth several tenths over shifting at 6000 even though the cam signed off below that speed. The Performer RPM was better than the F427 for that too.