07-12-2007, 01:24 PM #1
Ideal trim postion for speed runs.
I've heard one click from full up is the sweet spot. I also know it may vary between boats. On my boat running one click from full up the ski is pretty solid, but at around 74 MPH she starts getting a slight up and down motion. It isn't very bad and you can control it to keep from coming unhooked.
Is there a concensus on the best trim position?
Full up or one click from full up?
07-12-2007, 01:27 PM #2
I would bet it depends on where the trim is adjusted to on any given ski.
In theory the angle should be identical to the venturi for best speed (no restriction in flow). This tells me neutral when set correctly is the fastest.
07-12-2007, 01:28 PM #3
On my highlighter ski, it will pick up just a little bit of speed at one click up. At speed there is too much thrust coming through the nozzle and I can not click it all the way up no matter how hard I try.
07-12-2007, 01:30 PM #4
07-12-2007, 01:32 PM #5
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07-12-2007, 01:40 PM #6
I believe some people get the fastest speeds with the trim in the neutral position, but this is due to the trim tab set up and ride plate angle. If you can get enough lift with the tabs and ride plate, the thrust is more efficient coming out at the same angle as the pump nozzle. This is why many people make sure the steering nozzle lines up with the pump nozzle in the neutral position.
07-12-2007, 01:44 PM #7
07-12-2007, 01:49 PM #8
07-12-2007, 01:54 PM #9
if you can ride it at full up, you will go faster
07-12-2007, 03:38 PM #10
I keep mine at neutral.
* You want the rideplate to lift the hull, not the trim.
In neutral it also allows it to minimize any bends in the thrust going out. You want the flow as smooth as possible.
* also check your neutral position and make sure neutral is neutral. Measure from the end of the top of the steering nozzle to the inside end of the reduction nozzle both at 12:00 and 6:00. This ensures your neutral is set properly. I've seen ski set at neutral and the nozzle is actually just under it. And vice versa.
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