So right know my set up is direct drive 970 motors and 2 inch 40 degree props , in the past I could not get the iowa to 24 sec , always 26-27 sec . Im not a fan of the gear boxes so what do you think is better keep direct drive and go with the 775s since there a higher rpm or 550s or stick with the 970s with a belt drive of 2-1 , Thanks for the help.John
Hi Steve . Yes I currently running 12v I would have thought that would be good , motors are new but just cant seem to get it to 24
I have parts for the 970. You could go to 14-18 volts too. 970 motors wound to higher voltage can take a bit more than 12.
Those props might also be a bit small, I ran 2.25" on my North Carolina which is a good bit smaller than an Iowa. But I'll defer to the Iowa owners to give you advice on that.