Going only 1 and 2 mph upward I don't think you'll have a problem with shifting during WOT. BUT with +7 mph on the 3-4 shift I think you'll have a problem. Will probably hit rev limit and refuse to upshift. Around my neck of the woods I haven't found a long enough straight road to mod my 3-4 shift point to see if it helps so I leave it stock.

The only way you'll find out what works best for you is to try it.

 

so on the 3-4 should i put it on 3mph ? I don't want to leave the shifting stock becuase it doesn't accel as fast.