framerates are completely pointless. DO NOT BECOME A FRAMERATE JUNKY!!!.
I've seen people give up in disgust on games because they were so obsessed with getting higher framerates that they didn't enjoy the game itself anymore.
As long as you get fluid animation and responsive steering, you don't care if you get 10fps or 100.
Anything over 20 is useless anyway as your eyes can't process much more data than that, and anything over 7 or so (acceptable in high density scenery areas only, average performance should be better) gives reasonably fluid performance in FS2002.
I (and many others) have FS2002 locked at 15-20 fps, that gives good performance and prevents the engine from putting all CPU power into giving better framerates (which kills scenery detail and aircraft responsiveness).
So leave that framerate counter alone (having it on does cost performance b.t.w.) and enjoy the game rather than getting obsessed with getting that counter up.
I wish I were flying