tturbonegro
New Member
Just like the title states...where do you guys set your VTS when trying to achieve maximum speed? Assuming the water is flat..what's the best result you have had ?
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Where do you set your VTS for max speed?
- Thread starter tturbonegro
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bigJake
Well-Known Member
i actually tested this on flat water just last week. My best speed was 1 notch above level (on the gauge). Speedometer read 63 but I have not clocked it yet with a GPS. folks here say the speedometer usually reads a little high.
on my boat (not a seadoo), mercriuser I/O. after coming on plane, if I raise the trim about 1/4 of the way I get 5-10 MPH more.
on my boat (not a seadoo), mercriuser I/O. after coming on plane, if I raise the trim about 1/4 of the way I get 5-10 MPH more.
tturbonegro
New Member
Cool thanks...that was on your 96 or 97? 951?
SabrToothSqrl
Well-Known Member
up
trim up max, unless you start hopping or getting air, while your in the air, you aren't moving water, and are slowing down. i find just above center or a bit higher works, but if there is chop i need to keep it a bit down to keep me in the water.
just like a boat, trim up gets more boat out of the water, until it's out of 'sync' and loses grip... on a boat it's real easy to feel if the trim is off.. with a jet there is almost no feel, other than the ski bouncing, and losing grip and thus thust...
My top (GPSd) with my ski was 67.8. average of 2 1 mile runs opposite direction = 65.5
flat water, not much wind.
trim up max, unless you start hopping or getting air, while your in the air, you aren't moving water, and are slowing down. i find just above center or a bit higher works, but if there is chop i need to keep it a bit down to keep me in the water.
just like a boat, trim up gets more boat out of the water, until it's out of 'sync' and loses grip... on a boat it's real easy to feel if the trim is off.. with a jet there is almost no feel, other than the ski bouncing, and losing grip and thus thust...
My top (GPSd) with my ski was 67.8. average of 2 1 mile runs opposite direction = 65.5
flat water, not much wind.
bigJake
Well-Known Member
that was with the '97. the '97 has both speedo gauge and digital plus records max speed, '96 does not have a speedo for some strange reason. they are both 787. i still have to change some gray fuel lines and clean the carb filters on the '97 so it will be interesting to see if i get more speed.
brian96xp
Member
I agree with the less boat in the water theory to a point.. I was just out last night testing this very idea.. Being a boater I have a fish and ski with a mercruiser.. Getting more of the boat out of the water helps quite a bit in that scenario. With the ski however max speed is just about level on the VTS or just above. Sure less boat in the water less friction. Makes perfect sense. I was thinking it has to be related to how well the pump is picking up water... 
djredman99
New Member
Just agreeing with everyone else.
Nose up = better for top speed.
Nose down = better for cornering/turning.
Nose up = better for top speed.
Nose down = better for cornering/turning.
crisso
New Member
To get the max top speed try 2 things.
Get someone else to drive the boat and you get in another boat and run along beside it.When the boat is running along signal for the driver to trim it out.The nose will rise and less boat will be in the water.If you can get about half of the boat out of the water and there is no porpoising,it's prety close.If the nose is too high.You will be pushing water.
The other way is to drive yourself.Trim out untill you FEEL the water hitting the boat behind where you are sitting.This is usually a good balance.Into the wind is slightly lower than with the wind.
Have a look at some brochures of boats running at speed and you will see what I mean by balance.
I ran a super lightweight monohull in ski racing and only the last 15 inches of boat touches the water.It's like try to balance whilst standing on a length of 12inch pipe.The boat can fall sideways.(this is an extreme example)
Use the gauge as an indictator only.Try and get the feeling of driving through the seat of your pants.Running well,you will feel and hear a pattering sound coming from behind where you are seated.hope this helps
Get someone else to drive the boat and you get in another boat and run along beside it.When the boat is running along signal for the driver to trim it out.The nose will rise and less boat will be in the water.If you can get about half of the boat out of the water and there is no porpoising,it's prety close.If the nose is too high.You will be pushing water.
The other way is to drive yourself.Trim out untill you FEEL the water hitting the boat behind where you are sitting.This is usually a good balance.Into the wind is slightly lower than with the wind.
Have a look at some brochures of boats running at speed and you will see what I mean by balance.
I ran a super lightweight monohull in ski racing and only the last 15 inches of boat touches the water.It's like try to balance whilst standing on a length of 12inch pipe.The boat can fall sideways.(this is an extreme example)
Use the gauge as an indictator only.Try and get the feeling of driving through the seat of your pants.Running well,you will feel and hear a pattering sound coming from behind where you are seated.hope this helps
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