I've noticed - or rather haven't noticed - any hesitation problems at all since changing my induction method (an APS HFA). This sort of makes sense - there are likely to be problems in the air-inlet when crossing atmospheric pressure levels, i.e. at spool-up, which is exactly when the hesitation problem occurs. Could it be that the longer inlet reduces the turbulence enough so that the hesitation problem disappears?
Has anyone else with an extended induction inlet noticed anything similar?

 

bttt