29 scarab speeds? what do you do?

[scarrab30]

I have an old 30' 79 scarab. Two 540ci. bbc., TRS no steps, 5800rpm, hdromotive 26 quad round ear props. We consistantly see 90 . No blowers for me.

[humpster]

guy at procharger said no computer work had to be done on the twin 350's true or not true

[tssteph]

it is not required but will help it run cleaner and more efficient. Mine ran cleaner after the procharger install then it did stock. Mark at percision marin did both of mine.