Reading older threads on the Triumph forms indicates that you can pick up 6-8% on the top end by eliminating all the airflow restrictions in the intake path. This included filing down the throttle plate shaft and knife edging the throttle plates.
It looked like a tremendous amount of work for small benefit, however on a motorcycle every bit counts.
I'd like to know the optimum intake length from velocity stack to intake valve. I feel a lot of the set ups we have available leave power on the table in the low rpm band for the sake of looks and ease of install.
I've tried using this site
Intake Runner and Peak Torque Calculator And it spit out 18-24 inches depending on inputs given. If anyone else has a more relevant calculator please share.
-Steve