- Speedometer "Digital ReCalibration Device"
•The smallest electronic speedometer/odometer calibration
device in the world
•Saves max speed, which can be recalled to your stock speedometer
•Widest calibration range on the market (ratio based and multiplier/divider
•Built in testing mode to ensure proper installation
•Easier to setup than any other device on the market
•Priced below any competing product on the market
•Simple plug-in installation for many vehicles using factory
•Works for any 3 wire Hall Effect Sensor, or 2 wire Ground
•Works for vehicles which display MPH or KPH
•Ability to convert MPH to KPH, or KPH to MPH
•Ratio based correction in 0.1% steps, up to 99.9% + or -
•Fractional frequency multiplier & divider with 0.1 steps,
up to 99.9 + or -
•Weather proof design to protect against the elements
•18" wiring harness (1.5ft)
•3 year product replacement warranty
•Made in the USA
Universal version available for motorcycles, Cars & Trucks without
OEM Plug-In support.
OEM Plug-In support for over 200 popular motorcycle models, and
more kits are in development.
*Version M is now available which has a built in fractional frequency
multiplier and divider, in addition to the ratio based frequency
adjuster. This is a special application feature that allows users
to do complete gauge cluster or transmission swaps with vehicles
that have completely different PPM (pulse per mile) rates, no other
calibration device in the world has a wider frequency adjustment
|Is this device compatible with a fuel programmer
or other devices...
Yes, make sure to connect the other device directly to the speed sensor,
then connect the SpeedoDRD; The SpeedoDRD should be the last device
in the chain of devices, so it connects to the main harness which
goes to the ECU or Gauge Cluster.
Why would you need a Speedometer/Odometer
Many vehicles (especially motorcycles) come from the factory inaccurate,
sometimes as high as 10% off. Also, modifications such as tire size
changes or gearing modifications can cause significant speedometer
inaccuracies. Thus the speedometer calibration device is used in
series with the speed sensor in order to correct the signal before
it reaches your vehicles ECU computer. SpeedoDRD works for vehicles
which are manufactured with electronic needle or digital readout
speedometers, with 2 wire or 3 wire speed sensors.
How accurate is 0.1% correction steps?
If you were traveling 60mph (or 60kph), 0.1% of that would be 0.06mph
If you were traveling 200mph (or 200kph), 0.1% of that would be
0.2mph (or 0.2kph)
If you were traveling 300mph (or 300kph), 0.1% of that would be
0.3mph (or 0.3kph)
Thus correction steps of 0.1% are more than enough to get your speedometer
more accurate than your gauge cluster is capable of displaying.
Odometer vs Speedometer Correction...
SpeedoDRD does allow for Speedometer and/or Odometer correction,
although sometimes getting them both 100% correct continuously is
not possible, this is because some vehicles have an odometer error
rate which is not equal to the speedometer error rate, since your
ECU uses the same signal to determine both the odometer reading
and the speed reading, and sends the information to the gauge cluster,
this type of problem lies within the ECU or gauge cluster itself.
If you find yourself in this situation, you will be able to get
your speed 100% and the odometer very close. Or you can choose to
get the odometer 100% and the speed very close, or you could even
choose a happy medium between the two, and get them both equally
close, its up to you, and it depends on how far apart the two error
rates are from each other.
To determine your Distance error rate, use this formula:
100 - ((Actual Miles Traveled / Miles Displayed on Odometer) * 100)
= Distance Error Ratio
where "Actual Miles Traveled" is a mileage reference which
is known to be accurate, such as by a rolling wheel ruler, or laser
distance measuring tool, GPS device, etc.
To determine your Speedometer error rate, use this formula:
100 - ((GPS Speed / Speedometer Readout) * 100) = Speed Error Ratio
To determine the correction ratio for an error rate, you simply
invert the sign, example:
for a 7% error rate, you would need a -7% correction ratio entered
into your SpeedoDRD device
Another factor to consider is that your odometer has probably been
racking up inflated miles for quite some time now, so if your odometer
is around 4% errored and your speedometer is around 6% errored,
and you already have put 1000 miles on your vehicle with an errored
speedometer signal, you really only have only put 960 miles on your
vehicle, thus if you correct for the speed using a -6% correction
ratio to get 100% accurate speed readings, you will cause a -2%
correction on the odometer. This means that 2000 miles after using
your -6% correction ratio, your odometer will finally read what
it actually should. This is the most common situation among users
which have error rates which are not equal, because the speed almost
always has a higher error rate than the odometer if the two error
rates are not equal. For this reason, and in most circumstances,
it is usually best to go ahead and select to calibrate your speed
to be 100% accurate.