For the guys that have use both the 5port and 7port Go Tech .21 tubro head motors. What differences did you feel? How were your run times? How was the bottom end compared to the top end? Only reason I ask was cause I was going to be a 5port turbo but everyone is out of stock but I can get the 7port turbo. The tracks I run on are medium to big size tracks.
Here are some examples of tracks:
http://www.youtube.com/watch?v=_d9yUdSsOOU
http://www.youtube.com/watch?v=ToLYsuwHrsY