Direct Drive and V-Drive boats, do they porpoise?

[ridewake]

G'day,

well, i've been looking at boats, and have had soem people tell me that their d-drive boats porpoise, while their v-drive boats don't, and vice versa, what is the reality? I can't see either of these boats porpoising when loaded up with weight, but what do i know, i don't own one...YET...

any suggestions?

JMN

[boarditup]

Porpoising is the result of a balance problem between the waterpressure on the hull and the weight of the boat while on plane. This can be caused by a poor hull design, improper weight distribution, or poor driving skills. Some boats have more problems with this than others. If it does become a problem, trim tabs are used to force the bow down to eliminate the problem. If you weight down the stern too much, most boats will porpoise. I have not had the problem with my Gekko - it has a extension on the hull astern of the prop and rudder that eliminates the problem.

If in doubt, put a Fly High Fat Seat in the stern and run the boat at different speeds to see if it happens.

[krbaugh]

"it has a extension on the hull astern of the prop and rudder that eliminates the problem." so it has a fixed fiberglass trim tab right

[pedboydan]

my sanger does when it slightly at high speeds, and with 750 in the rear lockers it starts at around 32 mph

[Bruky]

Can someone clue me in? Are we talking about when the boat is like doing a wheelie? Jeez I feel like an idiot.

[krbaugh]

bounce bounce bounce bounce

[Bruky]

Oh, gotcha!

Thanks, I learned something new today

[Xaggerate]

My 02 Laguna has NEVER porpoised.....cruising at any speed under 20mph...she looks a little like a low-rider on the back end..which I LOVE...kinda drags her ass in the water....

@ 28mph and above..she's A cup size material

[Neognosis]

My d-drive malibu never porpoises.

[Swass]

Calabria makes a 21ft jet boat????? HUH????

[jvanick]

my Malibu VLX has only porpoised when we had way too much weight in the back and none in the front. Apart from that one time, it's never porpoised since then.

My old Sea Ray I/O used to purpoise if the trim wasn't set correctly.

-J

[darty]

i think most boats will porpoise when too much weight is in the back and you reach a certain speed...most never do it around wakeboarding speeds though. I've had boats that did it, but only when (like pedboydan) I got around 32-34mph w/ too much weight in the back

[Xaggerate]

[Bruky]

With all the audio junk you got in there it has got to substitute for at least like 2000 lb's of ballst, eh

[Xaggerate]

I need a 600lb fat sac for the ski locker...then I'll feel better about it...