running in the production pushrod bike class, the headwind is my biggest enemy. I can almost just add the headwind to my MPH and be real close to my best speed of 144.511MPH. done with a very nice tailwind], so most times the bike in its completely OEM state is in the mid to high, 130's. we did get to 140+ with the help of a Drummer modified exhaust muffler [thanks Kevin]
however this does not stop me from going, has taught me the importance of rider position, and consistent riding styles.
this season we will put a nice tune in it and do some data gathering, I'm only going to make the 1st 2 events, in 2014, while I build bike number 2 for 2015. as well as get the needed parts to bring bike 1 to its maximum potential, for the same season
back to your question, yes the headwind is almost always there, but some impressive speeds and many records have been posted with the Wilmington headwind. I wouldn't let it stop me from coming out to race.