Throttle Delay Fix.

[Tokay444]

The nannies are downright dangerous.
When I command the car to do one thing and it decides it's going to do something else instead, I draw a very large line.

[SubieRumble]

Originally Posted by Ultramaroon

I almost responded earlier today. You're never going to convince this kind of sanctimonious bullshit. It's up to the individual. I fucking hate the nannies. they're sloppy, slow, and sneaky. They literally intrude on my own rhythm on ice and hydroplaning. All these bulllshit features that try to be substitutes for personal responsibility just sicken me.

Similar to what I say about fast drivers. I'd rather drivers who go too fast(but predictable) who pay 100% attention to the road over drivers that are slow but paying less attention to the road(texting?). Can't tell you how many times I've almost been sideswiped buy these idiots...

[Ultramaroon]

Originally Posted by SubieRumble

Similar to what I say about fast drivers. I'd rather drivers who go too fast(but predictable) who pay 100% attention to the road over drivers that are slow but paying less attention to the road(texting?). Can't tell you how many times I've almost been sideswiped buy these idiots...

Probably as many as I have. The old biker rules hold true for everyone. Keep your head on a swivel, pretend you're invisible, and work to maintain that out.

Great to know you're out there with me.

[Viper8]

The throttle deadband zone (no engine response) from no throttle input to approx 1/4-1/2" of throttle input annoys me too. @steve99 or @shiv - Is it possible to tune the ECU with OFT so that fuel will begin to be fed to the engine earlier at less throttle input (shorten the deadband)?

[Kodename47]

Originally Posted by Viper8

The throttle deadband zone (no engine response) from no throttle input to approx 1/4-1/2" of throttle input annoys me too. @steve99 or @shiv - Is it possible to tune the ECU with OFT so that fuel will begin to be fed to the engine earlier at less throttle input (shorten the deadband)?

Yes, change the throttle mapping.

[steve99]

Originally Posted by Viper8

The throttle deadband zone (no engine response) from no throttle input to approx 1/4-1/2" of throttle input annoys me too. @steve99 or @shiv - Is it possible to tune the ECU with OFT so that fuel will begin to be fed to the engine earlier at less throttle input (shorten the deadband)?

as @Kodename47 said you can modify throttle mapping tables.


but you may also have load limit issue if its oft tune some tunes had load limits set to about 1.6 at all rpm this caused bogging at low rpm if you gave it a lot of throttle

[Toyota John]

I have logged the difference in speed between peddle and throttle opening a bunch of times now with different throttle mapping. you can clearly feel and see the delay in opening and closing of the throttle. I am not sure if the speed is limited in software with a yet undefined table or the limit of speed of the throttle motor. I guess it could also be the speed in possessing can-bus signals? I would like to hear from anyone who has installed an aftermarket ECU and if there was a change in throttle speed. I recently drove a Porsche Boxster S which also has Throttle By Wire and in was 90% better but a pre can-bus car. I also drove a new STI RA and the throttle was quicker. I am willing to bet this was done of FRS/BRZ to reduce tip-in knock as there are a bunch of tables in this car to reduce timing on peddle movement as well as to reduce emissions during shifting. I wish I knew how to define tables in open source so I could see if there are missing throttle tables. Who knows how to do this?

[Ultramaroon]

Originally Posted by Toyota John

I have logged the difference in speed between peddle and throttle opening a bunch of times now with different throttle mapping. you can clearly feel and see the delay in opening and closing of the throttle. I am not sure if the speed is limited in software with a yet undefined table or the limit of speed of the throttle motor. I guess it could also be the speed in possessing can-bus signals? I would like to hear from anyone who has installed an aftermarket ECU and if there was a change in throttle speed. I recently drove a Porsche Boxster S which also has Throttle By Wire and in was 90% better but a pre can-bus car. I also drove a new STI RA and the throttle was quicker. I am willing to bet this was done of FRS/BRZ to reduce tip-in knock as there are a bunch of tables in this car to reduce timing on peddle movement as well as to reduce emissions during shifting. I wish I knew how to define tables in open source so I could see if there are missing throttle tables. Who knows how to do this?

I still haven't gotten around to proving my theory about latency from VSC. Have you tried cutting it? As I stated here earlier, my butt swears that it interferes with throttle application even with the long press. I feel a distinct improvement when in pedal-dance mode.

[Mase123y]

Sorry to bring up an older topic but this is the same issue I seem to have. I have been running OFT Stage 1 for a few months now and the throttle response still seems sluggish at times. I was hoping that the OFT would fix the problem because I assumed everyone who runs the same stage 1 tune would have the same exact feeling car that I do but it seems not after reading these forums. I like the OFT because you can switch out different tunes. Would I need to get a custom tune at a shop? Someone who can use the OFT Rom Raider so I can keep using it.

[Ultramaroon]

Originally Posted by Mase123y

Sorry to bring up an older topic but this is the same issue I seem to have. I have been running OFT Stage 1 for a few months now and the throttle response still seems sluggish at times. I was hoping that the OFT would fix the problem because I assumed everyone who runs the same stage 1 tune would have the same exact feeling car that I do but it seems not after reading these forums. I like the OFT because you can switch out different tunes. Would I need to get a custom tune at a shop? Someone who can use the OFT Rom Raider so I can keep using it.

Have you tried the pedal dance?

[ermax]

I suspect part of the reason you don’t hear much bitching about DBW lag is most of the people who own a Twin are too young to have driven a cable throttle. There is a little lag but it’s WAY better than a lot of other DBW cars I’ve driven. The place I noticed it the most was on a blip right off idle. I don’t think it’s DBW lag though, I think it’s extreme knock correction that makes it stumble. 2017+ is even more aggressive with the TIR tables which makes the throttle even less responsive. I switched to E85 almost a year ago and I’m running the OFT E85 tune and the random dead peddle right off idle is completely gone. To me this sort of confirms it’s knock correction causing the dead pedal.

I’ve only tried the pedal dance a few times early in ownership of the car. Now that I have a good feel for the car I will give it a shot again to see if I notice a different in throttle response.

[Mase123y]

Originally Posted by Ultramaroon

Have you tried the pedal dance?

Ive seen a few different mentions of a "pedal dance". Is it to reset the ecu learning? I havent seen one procedure that most people agree on.

[Ultramaroon]

Official procedure here in section 4.

[Kodename47]

Originally Posted by Mase123y

Ive seen a few different mentions of a "pedal dance". Is it to reset the ecu learning? I havent seen one procedure that most people agree on.

No, Pedal dance is for the VSC. I've seen a few ways to reset the pedal/throttle learning, but the general theory is:
-Have car ignition on but engine not running
-Press accelerator pedal fully a few times
-Start car and idle car for ~1 min (if warm, this can take seconds rather than 1 min)

It doesn't all have to be at once. The accelerator pedal pushing allows the ECU to get max/min values for the pedal sensor and throttle position sensors. Idling allows it to set up the idle airflow. That's all there is to it. 5/10/25 pushes of the pedal I've seen mentioned. I'm not sure why it matters. I do 10, 8 quick with 2 that I hold as hard as I can to finish. Never had an issue.