Hey folks.. Forget the radar gun.. check out this interesting product:
http://www.nitroreview.com/news/November26-2003.cfm

That looks good.. BUT

I wanna know how it works!

Does it use a #RPM sensor on the wheel ? (yech.. inaccurate)
GPS? (yea right! for $50?)


Are there any external apparatus involved?

ram

Hopefully this will answer some of your questions:

http://www.venom-racing.com/inst/VSM...uctions-01.pdf

http://www.venom-racing.com/inst/VSM...uctions-02.pdf

Ineresting. Wont it get inacurate readings when you go from an object with a smaller diameter to one with a larger diameter?

...............you have a point there..................

I believe thats why you have to calibrate the "set distance measurement" as said on the instructions.

Maybe when I have extra cash I'll purchase one of these.

Yeah if you change the size of anything in the drive line, you have to recalibrate it. The size of your tires and your gearing shouldn't change that much, but if it does the readings will no longer be accurate.

Also.. it looks like this will only work with the first speed right?

Ram

hmm interesting, good thing I went back to electric! lol i might get one of these to tinker with. sounds like fun.

Works just like the bicycle speedometers with the sensor and magnet on the wheel, or a shaft. Can be either very innacurate or fairly accurate depending on how accurately you measure "set up" distance. The "speed meter" simply counts the revolutions of the magnet over the sensor, and uses an equation with the distance you put in to calculate the speed.

how come it will only work with a one speed.

You could use it with a 2 speed, 3 speed, SUV (lol), anything where the wheels contact the ground. If you put the magnetic pickup on one gear of your two speed, it will only give accurate readings of that gear. If you put the sensor on a driveshaft or the wheel (if you can mount the sensor by a wheel, and the pickup on the wheel) it would work for a 2 speed. The directions explain this also.
Peace

Directions...
Well.. that would be why I asked that question.

Thanks!

I'm not sure I like this system so much. If t it gave me speed info on my RADIO TX.. now THAT would be a nice buy

ram

Ah yes, if they could do that, it would be worth gold! That would be crazy!

Looks like it would work great for a bit at least until the first time you taged the rails or someone else...

Not to mention How you ever know if it is actually working unless you have a speed gun anyway...

Although It is probably pretty consistant and could be very useful to test different setups... Anyone out there actually have one of these things working?