camgear adjust question
 

I took my car to the track the other day, so i decided to bring my cam gear back to stock position since i would be in top end most of the time. i usually have it 2 degrees advanced. Its a SOHC. IMO my car felt slower when i did this...
But my main question is, why would anyone with a SOHC advance the camshaft at all, if during a race theyre always in high end anyway?