Top speed limiter datalogged

[brn12345]

If you ever wondered how the top speed limiter worked in our cars here is a snapshot of if in a real world test. At exactly 221km/h the throttle starts to close and by 226km/h the throttle goes to 50%. The car continues to accelerate but very slowly until 230km/h. This is very different from the fuel cut top speed limiter which is usually set close to 500km/h in our cars i.e. disabled.


I also posted on Datazap :
http://datazap.me/u/brn12345/top-speed-limiter-action

[Guillaume]

Interesting, thanks for sharing.

[Ondreiko]

Can we have this kind of limiter disabled with OFT?
Which maps should i modify and which way?
Or was it probably already disabled in OTS maps?

[brn12345]

Originally Posted by Ondreiko

Can we have this kind of limiter disabled with OFT?
Which maps should i modify and which way?
Or was it probably already disabled in OTS maps?

Yes you can easily disable it with OTS. You have to edit the bin file with a software such as romraider.

[jamesm]

yeah just increase both of the y axis values by the same amount. i think i have mine set to 326/321.

[Ondreiko]

Originally Posted by brn12345

Yes you can easily disable it with OTS. You have to edit the bin file with a software such as romraider.

,

Thank you. Which exactly maps/tables:
Miscellanious-limits->Speed limiting (throttle)? Modify all four tables the same way?
I was asking about the table names initially, just probably used the wrong definition =)))

[Victor Draken]

@shiv may your remove the speed limiter in the OTS maps?

[Kodename47]

As standard its set to 130 odd mph. You'll struggle to get much past that and I imagine they did that so you don't create a lot of heat. You can increase those boundaries on the maps quite easily, just move them well above the possible max speed to "remove" them.

[troek]

Originally Posted by Ondreiko

,

Thank you. Which exactly maps/tables:
Miscellanious-limits->Speed limiting (throttle)? Modify all four tables the same way?
I was asking about the table names initially, just probably used the wrong definition =)))

+1

[brn12345]

Originally Posted by Kodename47

As standard its set to 130 odd mph. You'll struggle to get much past that and I imagine they did that so you don't create a lot of heat. You can increase those boundaries on the maps quite easily, just move them well above the possible max speed to "remove" them.

Agreed on the temperature rise. Check out how the oil temp went from about 208F to 240F+ (Yellow line in the photo) just in this 5th/6th top speed run.
I've also added a log of this run on Datazap.me with more channels logged including oil and coolant temps.
http://datazap.me/u/brn12345/top-spe...g=0&data=1-5-7

[brn12345]

Originally Posted by Ondreiko

,

Thank you. Which exactly maps/tables:
Miscellanious-limits->Speed limiting (throttle)? Modify all four tables the same way?
I was asking about the table names initially, just probably used the wrong definition =)))

You would want to modify all 4 tables. I have attached a photo of Romraider and opened all 4 speed limiter tables. I modified one of them as you can see. Its important that you increment both values by the same amount as I did in the example by adding 40 to both sides.

[troek]

out of curiosity why does it have to be increased by equal amounts?

[brn12345]

Originally Posted by troek

out of curiosity why does it have to be increased by equal amounts?

I don't know really. I am going with the instructions that came with BRZedit which clearly say to increase by same amount. Could be that if you make the two numbers very close i.e. 137mph and 138mph then you would go from 100% throttle to 50% throttle in just 1mph. I would think that could be a safety concern.

[troek]

ahh i see.