Explain please? Not questioning your knowledge. I just don't know.
Is this discrepancy between rear wheel hp and engine hp? What should I be looking for?
Anybody else think it's off base?
We're actually at 4750 ft where the dyno was at, but I didn't figure 250ft would make that big of a difference so I rounded up, lol.
Yes, 107 is high and don't worry about it.
The shop one I get my runs done on is notorious for low numbers. 98 - 103 or so are legit numbers for a 919 depending on the dyno.
For example, an identical dyno 10 minutes away (club dyno at the track), run by the same guy, shows 5 HP more when a 120 hp zone bike is being tested.
Go to 919.org and look for the dyno papers. A two part paper. Part one is by Dan Kyle. Part two is by LDH.
Also, what were you running for fuel ? Regular ? (919s dyno lower on Premium, and that should be more so at your reduced air density altitude)
You should be more concerned about how smooth the torque curve is as compared to stock, and as a consequence, now smooth the hp curve is.
Look to see where the peak torque and hp occurs.
Oh yes, the horizontal scale has to be RPM, and not MPH !
Ask what the Air Fuel range is like, and what his targets were for Low, Mid, High and Full. Assuming the numbers are street use type and not max power types, the A/Fs will likely be in the low to mid 13s:1.
While the 107 is high beyond the norm, it does suggest that you have a fairly strong one. Maybe you have one on those magical "top 10%" engines. If you do, don't feel guilty about it.