Improved the velocity stacks

[Gumby 1100_imp]

You are correct, sir. The I.D. at the inner end would stay the same, and turbulence should be reduced. I imagine mpg improvement might be a way to gauge the success of this mod. Good luck with it PD. Also how much of a PITA to get those off?

Ben

Devil's advocate here:

I don't think that you would ever be able to gauge your mileage accurately enough, even under controlled conditions, to tell the difference. The only real test would be a before and after dyno run...otherwise this may just have been an "off-season-make-work-project".

What if the sharp inner transition was intentional in order to create turbulence for better combustion? Honda could just as easily have molded-in a smooth transition just like the rolled edge at the opening...'cuz I doubt that leaving the sharp transition saves Honda any money.

On the other hand, it would be nice if this provides some noticeable improvement, but Ben's comment about the effort to swap these out is valid too.