Why not use a GPS. At least you can find your way back to the pits. LOL
Glen
----- Original Message -----
From: "drmayf" <drmayf@mayfco.com>
To: <land-speed@autox.team.net>
Sent: Sunday, June 26, 2005 9:24 AM
Subject: My Speedo Issues..
> Sorry to all, I really did not provide enough information on th eissue
> staring at me. I have since determined how I might calibrate the unit.
>
> The speedo is a 300 mph Intellitronic (now Nordskog) unit that I bought
> some time ago. It counts the pulses fron the vehicle speed sensor on my
> transmissio. That unit uses a hall effect sensor and generates a number
> of pulses per revolution. To claibrate it to any tire or gear
> combination, the directions say to put the unit into cal mode, drive one
> mile and press some buttons. It will remember the number of pulses per
> mile and then uses that to calculate speed. Since I have no real desire
> to drive this thingy down any of Pahrumps famous roads I was looking for
> a way to turn the tire over 733.38 times, thats what the tire will make
> when rolling one mile. I had planned on just sitting there spinning the
> tire by hand...until I decide to see how many turns it takes. Nope not
> gonna do that. So here is what I am gonna try. Place the unit into cal
> mode, rotate the tire 10 times and see how many pulses it has counted.
> Multiply that number by 73.338 for th enumber in a mile. Then hook my
> signal generator onto the speedo wire, place the speedo into cal mode
> and activate the signal generator at a slow rate. when the appropriate
> numbe rof pules is showing on the speedo, stop the cal. I think this
> will work. The unit came programmed with 8000 pulses per mile and since
> it is a 300 mph unit I am thiking it will need to have about 16000 plus
> or minus pulses in it..
>
> This is a cool speeds. It can calculate quarter mile times, and other
> related things, has a trip odometer as well. As when I hooked the signal
> generator to it, I managed to go 686 mph in the shop with the car on
> jack stands!
>
> I'll let you all know how it works out. Gonna try the cal today.
>
> Oh and you all be changing you adress books because the old emaill addy
> for me is going away end of this month!
>
> mayf
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