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Go Back   WakeWorld > >> Boats, Accessories & Tow Vehicles Archive > Archive through June 17, 2007

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Old    Sinko (sinkoumn)      Join Date: Jan 2007       05-27-2007, 7:37 PM Reply   
So I was out riding today and decided that the pp on my boat was reading too high (23 feels like 25 or 26) but I realt can't tell outside of a guess. I want to calibrate it to read correctly but don't have a GPS or anything fancy like that to set up the speed correctly.

Does anyone have a suggestion on how to do this without a GPS to tell you you current mph?

If there isn't an easy way to do it without using the GPS no worries, I just wanted to see if anyone has any insight to drop on my dumb self.
Old    Troy (liveoz)      Join Date: May 2002       05-27-2007, 8:55 PM Reply   
If you know the distance between two points (a salomn course works best) you can time how long it takes and do the math to figure out your mph.
Old    Sinko (sinkoumn)      Join Date: Jan 2007       05-28-2007, 9:29 AM Reply   
That's the backup plan if I can't get a GPS. Probably going to just lay buoys and Time it.
Old    WakeShoe (wakeshoe)      Join Date: Jun 2004       05-28-2007, 2:39 PM Reply   
From a post about a year ago:

Perfect Pass Calibrations


The following adjustment syncs the Perfect Pass and boat speedo:

1) Make sure control is off and in wakeboard(speed) mode (not RPM)

2) Press up and down arrows together

3) KDW will appear

4) Set this to 150.

5) Press menu

6) NN appears

7) Set this to 100.

8) Press menu again.
----------------------------------------------

1) Make sure Perfect Pass is OFF.

2) Run boat at 3800 rpm. This should read 36 mph on speedo. If not, adjust with knob at bottom of speedo to 36 mph.

3) Run boat at 36 mph and adjust Perfect Pass speed by pressing menu button 1 time. It will say calibrate speedo. ex) If speed reads 38 mph on Perfect Pass, press the up arrow to achieve the 2 mph difference. If it reads 34 mph, press the down arrow to drop it 2 mph.

Note: The following fine tunes the speedo and Perfect Pass after performing the above steps.

1) Turn on Perfect Pass and select a speed below 25 mph, ex.) 16 mph.

2) When Perfect Pass takes control, press the menu button

3) Speedo Calibrate will appear on screen

4) If boat speedo reads higher than the Perfect Pass, use the down arrow to lower the speed to match Perfect Pass. You will feel the boat slow down. If it reads lower, press up arrow to raise speedo.

5) Repeat above steps only with a speed set on Perfect Pass above 25 mph.

6) Push menu button and speeds are set.
Old    Kevin R Baugh (krbaugh)      Join Date: Mar 2002       05-28-2007, 6:47 PM Reply   
"2) Run boat at 3800 rpm. This should read 36 mph on speedo. If not, adjust with knob at bottom of speedo to 36 mph. "

With the above method there is no guarantee that the speed will be any where close to accurate. I would almost guarantee that it will be wrong.

You can get a very inexpensive GPS and your problem is solved even better borrow one from a friend

http://www.overtons.com/modperl/product/details.cgi?pdesc=Lowrance_iFinder_Go_Handheld_GPS _32MB_memory&cname=Handheld-GPS&r=view&i=74890&aID=18A

$79.00

(Message edited by krbaugh on May 28, 2007)
Old    Mikeski (mikeski)      Join Date: Aug 2003       05-28-2007, 7:52 PM Reply   
3800RPM may not be close to 36MPH depending on your prop.

I use a GPS runners watch to calibrate my PP:
http://cgi.ebay.com/NEW-Timex-Speed-and-Distance-Ironman-GPS-Watch-T54012_W0QQitemZ120125045400QQihZ002QQcategoryZ440 76QQrdZ1QQcmdZViewItem
Old    Chuck H. (toesideturtle)      Join Date: Oct 2002       05-29-2007, 11:54 AM Reply   
GPS is the only way.....on my boat @ 24.2 mph we are running between 3400-3500rpm--I doubt that at 3800 rpm we would be anywhere near 36mph.
Old    Allen Sasser (bamacpa)      Join Date: Aug 2006       05-29-2007, 8:14 PM Reply   
I purchased my boat with PP already installed and do not have a manual for it. How would you use a GPS to calibrate the PP? I already know that the GPS reads about 2 mph faster than my PP. Ex. when I'm running at 22mph on the GPS the PP reads 20mph.
Old    Ryan Haug (ryan27r)      Join Date: Oct 2006       05-29-2007, 8:59 PM Reply   
Now adjust your PP to match the GPS Allen...
Here is a link for the manuals http://www.perfectpass.com/pp_support_usersmanual.html
Old    Allen Sasser (bamacpa)      Join Date: Aug 2006       05-30-2007, 9:29 AM Reply   
Thanks Ryan. Just what I needed.
Old    Ryan Haug (ryan27r)      Join Date: Oct 2006       05-30-2007, 12:15 PM Reply   
No problem... That has helped me in more than 1 occasion.

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