ORIGINAL: Flyboy Dave
Here's ol' FBD...."not following the manufactures instructions". (again

)
....over 16 grand on the third run....
16.2 is perfect for a 424 setup. Nothing wrong with that
my Thunder Tiger .40 engines get up OVER 16.5K on the third run (clipped prop) and by the 5th tank hold at least 16K with the 9x6.