1973 23' cc with bracket performance??

[travisrandall]

I have tried many different props, i can turn a 19 high enough but i dont get anymore speed than a 17 mirage. whenever i hit 33-34 mph the motor isnt getting enough water, the guage bounces around and eventually runs hot. I have the 225 merc mounted as low as possible on the bracket and it is in the water when on plane. do any of you guys have a 23' with bracket? and where are things positioned? i know i can get more than 35 mph out of her but not with heat issues.