Adjusting Speedo through aims race studio 3

[cuttz]

As tittle says I have finally found my speed source and I'm pretty sure it's been wired directly to the dash instead of the ecu.

 

Is there a way to tune it so it's right. I'm clocking up the kms ATM as it thinks I'm doing 450kph everywhere.

Ive tried to change it in the ecu but the ratio doesn't do anything

Thanks in advance

[Adamw]

To confirm it is actually a direct dash input, can you check in the ECU runtimes screen (F12) if any of the wheelspeeds show any speed when you are driving.

[cuttz]

I'll check soon as I get home tonight

[cuttz]

So had a look at the run time then and short answer is no nothing pops up there in speed sensors 

[Adamw]

Ok, can you attach your dash config then.  In RS3 go to the configurations tab then click export.

[cuttz]

wont let me upload this file

do i need to use a file resize or something

 

https://drive.google.com/drive/folders/1WlxvWPWRUHgVRsg_kVuafC9EnEfXPsLR

 

let me know if this works

[Adamw]

The google drive link should work but it looks like you havent given it the correct permissions.  Can you go to the sharing settings and set it to "anyone with link can edit"

[cuttz]

https://drive.google.com/drive/folders/1WlxvWPWRUHgVRsg_kVuafC9EnEfXPsLR?usp=sharing

 

try again man

 

[Adamw]

Yep, it looks like you are using the built-in dash speed input.

Go to the main channels tab and click on the channel named "speed", that will pop open a channel settings dialog where you can adjust the wheel circumference and pulses per rotation.  If you dont know the pulses per rotation you can just do it by trial and error, adjust that number until the dash speed matches a GPS speed on your phone or something.

[cuttz]

ok awesome ill tray that and get back to ya thanks mate

so is it best to start adjusting the pulses or the diameter first

and is wheel diam the over all including tyre or just wheel

 

[Richard Hill]

Overall Including tyre,   A good way to measure it is to put a chalk mark on the ground at the tyre contact point , then roll the car 10 wheel turns and then re-mark the ground.  Measure this distance and divide by 10.

If you are in the UK, then the following regulations apply :-

the speedometer must never show an indicated speed less than the actual speed. ... However, for all actual speeds between 25 mph and 70 mph (or the vehicles' maximum speed if it is lower than this), the indicated speed must not exceed 110% of the actual speed, plus 6.25 mph.

 

HTH,

 Richard

[cuttz]

thanks for the info.

and I am from AUS same same but different 

[cuttz]

Eh I finally have a speedo.

For those interested the mx83 sensor uses 4 pulses. Don't know why but I had to turn down the diameter to like 1585 when I'm running 17 inch wheels with a 45 tyre.

 

Only thing to Susan out now is the gear calculation thinks I go up a gear in between 2/3 thinks I'm in 4th