tony thomas wrote:

Be carefull w/ putting a lot of hp into a boat that was not designed for it.
I/O type boats - if overpowered - will run sideways due to the torque of the
engine. The boat is just not designed hull wise for a big hp/torque power
plant.
They come w/ V8 but at about 250 hp or so. If you put 400+ hp in it you may
find that it does not run straight.


On a typical I/O single(Mercruiser, Volvo SX, Cobra), facing the stern
from outside the boat, the engine is turning ccw, and the prop(single,
again) is turning cw... so I really don't understand your statement - is
it torque from the prop or from the engine? If it's the engine, what is
the moment?

Rob

It is really fom the prop. You would be turning a lot bigger pitch prop
than stock which will pull on the boat more than the hull can support.

--
Tony
my boats and cars at http://t.thomas.home.mchsi.com
"trainfan1" wrote in message
...
tony thomas wrote:

Be carefull w/ putting a lot of hp into a boat that was not designed for
it.
I/O type boats - if overpowered - will run sideways due to the torque of
the engine. The boat is just not designed hull wise for a big hp/torque
power plant.
They come w/ V8 but at about 250 hp or so. If you put 400+ hp in it you
may find that it does not run straight.


On a typical I/O single(Mercruiser, Volvo SX, Cobra), facing the stern
from outside the boat, the engine is turning ccw, and the prop(single,
again) is turning cw... so I really don't understand your statement - is
it torque from the prop or from the engine? If it's the engine, what is
the moment?

Rob

On Sun, 05 Dec 2004 20:14:29 GMT, "tony thomas"
wrote:

It is really fom the prop. You would be turning a lot bigger pitch prop
than stock which will pull on the boat more than the hull can support.

===============

Easily fixable with trim tabs in my experience.

Which creates drag and partially defeats the purpose of more hp.

--
Tony
my boats and cars at http://t.thomas.home.mchsi.com
"Wayne.B" wrote in message
...
On Sun, 05 Dec 2004 20:14:29 GMT, "tony thomas"
wrote:

It is really fom the prop. You would be turning a lot bigger pitch prop
than stock which will pull on the boat more than the hull can support.

===============

Easily fixable with trim tabs in my experience.

I'm doing low 60's in my 5.7 19.5" and it tracks straight. A little
squirley in light chop at that speed. Definately not a boat for rough water
though, pounds like hell. I think with a little more prop I could get to
65. Or a blower :-)

"tony thomas" wrote in message
news:KaPsd.448578$wV.385074@attbi_s54...
Which creates drag and partially defeats the purpose of more hp.

--
Tony
my boats and cars at http://t.thomas.home.mchsi.com
"Wayne.B" wrote in message
...
On Sun, 05 Dec 2004 20:14:29 GMT, "tony thomas"
wrote:

It is really fom the prop. You would be turning a lot bigger pitch prop
than stock which will pull on the boat more than the hull can support.

===============

Easily fixable with trim tabs in my experience.

On Wed, 08 Dec 2004 02:04:07 GMT, "JamesgangNC"
wrote:

I'm doing low 60's in my 5.7 19.5" and it tracks straight. A little
squirley in light chop at that speed. Definately not a boat for rough water
though, pounds like hell. I think with a little more prop I could get to
65. Or a blower :-)


I bought a brand new 23' Stingray about 10 years ago. It was a fast
boat, but it was built too light, and suffered accordingly. Read my
full review he

http://home.ptd.net/~n3cvj/stingray.htm

Dave