I looked it up. They were rated for 37 knots. I guess they are going easy on the old girl.
After all that work,and it was extensive,on that boat over the years I understand why they are taking it easy on her.But just once to open her up would be such a thrill getting her up on the step.
Regarding PT boat speed - Remember this rebuilt boat is probably using its original but rebuilt Packard motors, thus not maxing out the original speed makes sense. the RAF’s Battle of Britain flight does not fly its original/rebuilt Spitfires and Hurricanes at full throttle as it rule to ensure the preservation of the planes and the Rolls Royce Merlin engines. Those engines have been rebuilt multiple times over the decades.