Speed Trouble

Speed Trouble

Post by GZ » Wed, 01 Jul 1998 04:00:00


I have a Ski Ray 190 with a 175hp Mercury Outboard and a High Five Prop..

I seem to have some trouble keeping the boat at a slow enuff speed for
wakeboarding, it comes off plane and them just starts to go faster and
faster..
I just started wakeboarding last year and am getting big air but want to be
able to keep the boat at like 18mph to learn more tricks, but other people
have a real hard time keepin my boat at that speed.
Would a "hydofoil" addon thingy help?
Has anyone tried one of these?
 I see 2 of them listed in the Ski LTD Catalog
one is the SE Sport 300-Turbo Hydofoil for $44.95 and the other is the
StingRay Hydrofoil Stabilizer  for $34.99
DO these do anything?
My boat has MORE then enuff power out the hole as is.. so I am not looking
to get more holeshot.. just to help keep my  outboard at a more even
speed......

 
 
 

Speed Trouble

Post by Michael Newcom » Wed, 01 Jul 1998 04:00:00

The foils work well.
I had one on a marlin and was able to maintain plane as low as 12 mph.
As much as I hate to recommend overtons, they carry a stainless steel one
for around 90 dollars.
This one also reduces the wake at higher speeds for better skiing.
Michael

 
 
 

Speed Trouble

Post by Ray Pulle » Wed, 01 Jul 1998 04:00:00

Quote:
>have a real hard time keepin my boat at that speed.
>Would a "hydofoil" addon thingy help?
>Has anyone tried one of these?
> I see 2 of them listed in the Ski LTD Catalog
>one is the SE Sport 300-Turbo Hydofoil for $44.95 and the other is the
>StingRay Hydrofoil Stabilizer  for $34.99
>DO these do anything?

I ran a foil on my 20' I/O with a high five. The boat planed a little sooner,
and hooked up in high speed corners a little better. It was kind of spooky in
trimmed out high speed turns, as it would sort of catch and act strange (it was
not dangerous, just took some getting used to).

Given that it planed at a lower speed it might help with holding the low speeds
more consistently. The problem with many boat setups is that wakeboarding speeds
are in the twilight zone where the boat is climbing up on the bow wave to plane.
A little further up and speed increases greatly, a little frther down and you
fall back in the hole. The high five might be making the problem worse as well
(good prop though). Try changing back to the stock 3 blade. Also try different
trim settings as these definitely affect the speed at which the boat planes
(trim out a little) and will have the added benefit of increasing the wake some.

Do you have a standard Merc throttle handle setup? These often make it difficult
to set and adjust speed precisely. Maybe you can put a tourney style control on
the boat?

Good luck.

Ray

 
 
 

Speed Trouble

Post by GZ » Wed, 01 Jul 1998 04:00:00

I have a QuickSilver throttle
yeah I like wakeboarding with the trim up a bit but then the speed is even
harder to control..
BTW what is WOT ???

Quote:

>I ran a foil on my 20' I/O with a high five. The boat planed a little
sooner,
>and hooked up in high speed corners a little better. It was kind of spooky
in
>trimmed out high speed turns, as it would sort of catch and act strange (it
was
>not dangerous, just took some getting used to).

>Given that it planed at a lower speed it might help with holding the low
speeds
>more consistently. The problem with many boat setups is that wakeboarding
speeds
>are in the twilight zone where the boat is climbing up on the bow wave to
plane.
>A little further up and speed increases greatly, a little frther down and
you
>fall back in the hole. The high five might be making the problem worse as
well
>(good prop though). Try changing back to the stock 3 blade. Also try
different
>trim settings as these definitely affect the speed at which the boat planes
>(trim out a little) and will have the added benefit of increasing the wake
some.

>Do you have a standard Merc throttle handle setup? These often make it
difficult
>to set and adjust speed precisely. Maybe you can put a tourney style
control on
>the boat?

>Good luck.

>Ray

 
 
 

Speed Trouble

Post by Ray Pulle » Wed, 01 Jul 1998 04:00:00

WOT=Wide Open Throttle

Your engine should be pulling very close to rated RPM (probably on a sticker on
the engine, but certainly in a manual somewhere) when you are running flat out.
The prop is pitched right when you are close to this RPM at WOT (or within maybe
200 RPM or less). Lower is better than over revving.

The person that posted the stern lift info. with the 5 blade is right, but I am
scratching my head as to whether this is better for you or worse (as far as low
speed holding). My guess is that it is planing the boat sooner and less lift at
the stern would help, as the previous post suggested. Yeah, I know, you already
spent mucho bucks on that pretty high five! This is why I suggested trying an
aluminum that you might have as a spare (everyone has a spare, right?).

Changing weight distribution in the boat is free and worth a try as well. More
towards the front will nose the boat over sooner and try to plane earlier and
vice versa.

Ray

 
 
 

Speed Trouble

Post by MQualkin » Thu, 02 Jul 1998 04:00:00

Quote:
>I seem to have some trouble keeping the boat at a slow enuff speed for
>wakeboarding, it comes off plane and them just starts to go faster and
>faster..
>I just started wakeboarding last year and am getting big air but want to be
>able to keep the boat at like 18mph to learn m

It seems to me that the problem is one of planing not coming off plane.  Adding
a foil will indeed allow you to plan at slower speeds but it will also reduce
the wake that you crave.  The high 5 is a solid all around performer, but it is
by design a 'tail lifter',(it lifts the back of the boat before it lifts the
bow) working against your desire for a large wake.  Not exactly the prop you
desire for your use.  Try an 18p Turbo 2+2 w/exhaust ring then change your
driving technique to where you use no trim, Keep the motor tucked into the
transom.  The combination of the Turbo, a bow lifting design, used with the
engine tucked should allow you to drive at 18 mph while 'plowing' thus
increasing your wake size and holding speed.  Top end won't be too shabby
either.  Good luck.