Originally Posted by markt111 (Post 4122920)

so I have recently changed to a smaller boat due to lack of time to use, docking, family, reastoring an old house etc..I have a 1994 221 liberator with a 502 (375 at the prop) I picked it up last August to have something to trailer for occasional use. The boat is very clean and should work perfect for my needs. Everything I read tells me this is a 60-62 MPH boat. I have scene over 60 on GPS in it in the couple times I have used it with me the wife, the kid and full of fuel gear etc.. note this is running an old raker prop that looks like it is probably original and not exactly pristine

so i'm trying to figure out why this should only be a low 60 boat with 420HP, 21 deadrise, 4000lbs I know it is a fairly heavy hull for its size but I see others with 25'-27' boats with stock 502s claiming to run 70 and they are heavier or atleast as heavy

so what is it in the hull design that makes it fast? I am not talking stepped hulls either, I understand that

I do plan on buying a new prop and having it labbed once I get some accurate numbers early in the season

Originally Posted by markt111 (Post 4123014)

c-mon we all know Reggie needs a little help with his personal style,

but on a serious note is there that much difference in th hull itself or more that these manufacturers spend the time on set up to get every MPH out og thier hulls

Originally Posted by thirdchildhood (Post 4123112)

I'm still trying to figure this one out! Pads can improve speed but also make a harsher ride. The Donzi 22 Classic has 24* deadrise and no pad. There is hull dragging through the water but they run 73 mph with stock 420 hp. They run near 85 with 540 hp. Put in 700+ hp and they run over 100. Maybe it has to do with the weight and weight distribution. The bow needs to be light and out of the water without excessive trim.

Originally Posted by Budman II (Post 4123116)

The Classics also have a very narrow beam, don't they? I would think that this would lessen drag in the water considerably.

Originally Posted by thirdchildhood (Post 4123129)

I believe beam is 7'. Length is honest 22' 6". I'm thinking that what's slowing down the Four Winns is the cabin and all the weight up front. The Donzi has no cabin. This is why the Donzi ZRC, Fountain 42 Poker Run edition, certain Apaches etc are so fast. No cabins.

Originally Posted by BenPerfected (Post 4123211)

Five basics: Excellent bottom, high X, right props, lots of testing, big HP and cubic $ for all.

Originally Posted by markt111 (Post 4123292)

What does "excellent bottom" mean? I have googled about blue printing hulls every which way I can think of and come up with almost nothing and vague!