Thread: Need Help GPS speeds are down
08-13-2007, 05:54 PM #1
Need Help GPS speeds are down
Ok so I just got my gps and i have stage 1 plus bov, green wheel and reverse bucket mod. Water 87 Air 90
First Run 70.8
Second Run 70.4
Third Run 71.1 (superman)
All my stage 1 kit is out of the box including the 14/19r prop
08-13-2007, 05:56 PM #2
so your gps speeds are down..in comparison to what??
08-13-2007, 05:57 PM #3
i see everyone else on the forum running 68-69 bone stock. I think something is wrong.
08-13-2007, 06:00 PM #4
you should pitch your prop some to take away some rpm you are turning too much.......
you will go faster at 8100 than at 8180
08-13-2007, 06:01 PM #5
do you have stock numbers to go by? do you have other gps numbers from a different day with your current mods that yielded better results?
how many hours on your ski?
maybe you should try adding a mm of pitch to your prop
a stage I + green wheel should in regular cases require 1-1.5mm added to it
08-13-2007, 06:16 PM #6
i have 50 hours on it and i just noticed my stock wear ring has about a 1/32" or 1/16" groove worn in it. maybe a ss wear ring and a pitch would do the trick
08-13-2007, 06:29 PM #7
flip the wear ring and check your rpms. then if they are higher (which they will be if the ring is worn) you will have to pitch
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