Dyno day

Author
Discussion

NASA racer

Original Poster:

89 posts

231 months

Sunday 14th January 2007
quotequote all
Did a dyno day to tune my stock Hayabusa motor. The dyno operator had a plot for a Radical SR3 carburetted and it's dyno traces were very similar to my baseline run (150 RWHP). We ended up with 165RWHP and 101 ft.lbs. of torque and the low-end power was about 30% more (below the torque peak) than the carburetted SR3.

He also had a plot for a professionally built 1400 motor which made 185RWHP.

Lesson is that stock Hayabusas properly tuned make much more power than "Powertec" 1300s.

Using the manual chain tensioner, somehow I didn't "break" the chain as Radical claimed they did