Do you know when and where the dyno testing was done? If it was done in the same area as where you'll be racing and if it was done during race season then use the actual number. If the dyno was someplace that you'll never race in then the actual numbers might not represent what you'll see at the track.

Right now our dyno is correcting power down not up. This time of the year the dyno correction factor is usually 98% or 99% so the actual power is greater than the corrected power. The air density meter in the dyno room was reading 107% yesterday when we were testing. Baro was at 30 and air temp was about 50 degrees. Only problem with those conditions is that the track would be so cold that nothing would ever hook up. But the engine would be making really nice power!