VSS 155 mph Off= N2O, VTS,RVS,BC Duty

[sass]

Hondata
Have you ever had the problem when speed sensor turns off after car reaches 250km/h? ( 155 mph)



My speed sensor 78410-S5T-901
What could be a solution changing to some alternative more reliable sensor?
Thank

[Hondata]

The speed sensor will only read to 255 kph (internal limitation of the ECU), but it should not switch back to 0.

[sass]

I understand.

What might be an idea?

[Hondata]

What sort of speed sensor is it? The final drive or 3rd gear?

[sass]

My speed sensor 78410-S5T-901

My gear NPR3
1
3.226
2
2.130
3
1.517
4
1.212
5
0.972
6
0.780
final drive
4.105


Speedometer Drive
41312-PE6-310
Honda CTR JDM 4.764


Сar used in races on the mile
https://www.facebook.com/revSpeed.eu

[Hondata]

The next step is to try another speed sensor.

[sass]

The next step is to try another speed sensor.

Hello hondata,

still have the same problem with speed sensor: i have changed 2 sensors but still do not work propeply.

2015
Speedometer correction 12%
1 race


2 race


2016
http://www.onemile.ee/?lang=en&page=res ... 2016&acm=1
New gear
Speedometer correction 9%
1 race


2 race


https://www.facebook.com/OneMileChallenge/

[Hondata]

We've run multiple vehicles over 255 kph and the speed usually pegs at 255 kph. I would consider raising the front off the ground and running it in top gear to see if the problem is load or speed dependent.

[sass]

I would consider raising the front off the ground and running it in top gear to see if the problem is load or speed dependent.

can you explain?
Thank

[Hondata]

Pick a place where the neighbors will not complain. If you are 4WD then you'll need to disconnect the rear driveshaft. Jack up the front of the car and support the lower arms so that the axles are straight (to keep the CVs happy). Put in top gear and run then engine to 260 kph. If you're close to redline at that speed then I'd be a little careful as the engine is less happy at high rpm under light load than full load.

[sass]

Sorry.
I am not crazy.
I will think about it on the dyno.

[sass]

Hondata
I'm sorry for the delay
I have no answers

I know that this is not a problem speed sensor. What frequency (kHz) you are using for the speed readings?

[Spunkster]

Post your calibration as well

[sass]

ok

The speed sensor will only read to 255 kph (internal limitation of the ECU), but it should not switch back to 0.

it looks weird
https://www.youtube.com/watch?v=bjVjWMT ... e=youtu.be

[sass]

Hondata
how it's going with that issue