Yellow Box: Speedometer calibration for bigger/smaller tires

[cashcow]

Hi Guys,

I stumbled on this online and wondered if it could be used with our RAV4 EV to adjust the speedometer after switching to either bigger or smaller tires?

http://yellr.com/yb_home.htm

Yellow Box Speedo Recalibrator v4
The Yellow Box is a speedometer recalibrator for motorcycles, cars and trucks.
It corrects for the usual stock speedo errors and gearing change speedo errors etc.

The Yellow Box is easy to use and remains on the bike correcting the speedo
in real time. Installation is a simple 4 wire splice connection or quick plug-n-play.

The speed correction can be easily changed at any time to compensate for tyre wear,
MPH-KPH or KPH-MPH conversions needed on the road while travelling.

Yellow Box v4

Features of the Yellow Box v4 -- Model No. YB4
Corrects both the speedo and odometer by the same percentage/correction ratio
Speedometer correction range; -50% to +100% (1:2 to 2:1 ratio range)
Fine correction adjustment; 0.5% steps
KPH-MPH and MPH-KPH speedo conversion

Bright LED displays switch settings and test modes
System testing on power-up, inbuilt input and output tests
High-speed microprocessor accuracy, instant response, no speedo lag
Fully digital, exact, instant adjustment

Conveniently powered from speed sensor power
Power supply voltage; 5 to 16 volt
Very low power consumption (20mA)

Tiny size; 37 x 62 x 14mm, weighs only 32 grams
Rugged water and vibration proof encapsulation
Strong mounting hole and connector strength
Compatible with most modern motorcycles, cars and trucks
Legendary reliability and 10 year replacement warranty!



How it works
To learn more about speed sensors see Using and Installing instructions.




The Yellow Box receives electrical pulses from the vehicle speed sensor.
The high-speed microprocessor (tiny computer) inside the Yellow Box uses
our proprietary digital software to precisely correct the signal pulses.

I'd guess you could also use it to go faster than 100 MPH. I think the Model S top speed is something like 140 MPH or something. Not that you'd want to go that fast on a high standing SUV .

Anyway, benefits of smaller tires? Faster zero to sixty? Because of the lighter weight of smaller wheels? I'd guess this would accompany it with a suspension lowering and cool new look.

): face included in package!

other options?

https://www.summitracing.com/search/part-type/speedometer-recalibration-devices

 

[swogee]

I mentioned in another post that I was curious what size tires and wheels were used for the mods on the Pikes Peak RAV4 EV. I would also like to know what specific mods and parts were made to the suspension to improve the handling. I'm not sure if Toyota would be willing to provide the info for the modifications but it would be interesting to contact them and see what they say. They might have info on how the speedometer was modified as well.

 

[cashcow]

http://www.trdusa.com/rav4.html

I have a feeling that is the most we will get out of them. Looked like they removed a lot of stuff and got the 0 to 60 time down to 6.2 sec!