It's nuts to have that much power on the back. A friend of mine had those engines on the back of his 27 magnum. The fastest he every got it running was 78mph. Going that fast is dangerous . . .

http://www.offshoreonly.com/forums/m...fe-killed.html

Thats my boat! yes, im currently restoring it.... going to try to hit 90 mph. Yes, it does eat up all the boats that are suppost to go fast. Yes, its extremely stable and does not chine walk unless you over trim the boat. I decided to keep it and completely gut the boat. Could use some input. Removing liner and would like to take the deck all the way forward without step...

This is very interesting to me - several members have reported moderate to severe chine walking on 23s somewhere north of 60 with twin OBs while others have not had a problem up near 70 (Seavette). Did you run into chine walk and, if so, what did you do about it other than trim?

Thanks for posting that Tim. Things happen fast out there. I`m happy I have 150s
for the race boat. Not so happy after pulling off the paint and fairing work.
Can`t believe a pro shop did such crap work.

I`m shooting for balance and min plane speed. Min plane speed will be far greater
than my wish me thinks. Been thinking of K planes or maybe a better design.
I`m thinking wider.

I`ve had a safe drivers endorsement since `92.
My childhood friends remain in disbelief when visiting.

Cheers,
Notsofastanymore

If your goal is to hit 90 mph with that boat I would start with adding a transom notch and work to flatten the back bottom of the hull to give more of a pad to run on. And since you appear to be working this to be a performance boat any deck work should be done with composites as there is lots of weight to be lost if you are getting into that anyways.

I interested to what you are running for props to get the speeds you are seeing? Pitch?

I went along for a ride on TheOtherTom's high powered Whitewater with some other Seacraft loonies along time ago and we hit 68mph in the ICW with throttle left :) I can see feel the smile on my face.

Removing liner begs the question - replacing it with what?:eek:
I suppose coring the hull would make sense in lieu of a liner. I highly recommend full tight leathers and a hard hat. Also curious about yer props.

Saw this boat at Black Point Marina, and the boat does sit well in the water, and the owner stated it would do around 90 mph, and it had a steering wheel on it at the time I saw it. My 71, 20' Custom CC does over 60 with a 225 Opti on the back, and will chine walk a little if you trim it out to much, so 90 mph plus is not out of the question.