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Old 16th September 2016, 22:14   #46
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So this means that the pedal box does alter the 0-100 km/hr sprint timing, as in it makes it quicker. That's good to know then. Thanks frankmehta
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Old 18th September 2016, 09:50   #47
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Default Re: PedalTune: Customisable throttle response

Have been tracking this thread since day 1 and has been interesting to see various view points on what this product actually is and does. This lead me to do some further search on the internet on these boxes and got the following data from the horses mouth which is the DTE systems website whose technology is incorporated in the Pedal Tune box by TTS Auto (as per the TTS Auto website) which Frank has installed in his car. Hence I would like to share the theory followed up with the practical experience of using this device.

The tune box captures the accelerator pedal signal and transforms it. There are 2 voltages as mentioned earlier which are captured and accordingly modified by super imposing additional voltage which is controlled by a Microchip and varies depending on the base voltages of the accelerator sensor thus unlike an analog system which purely adds a fixed voltage to the existing source. The same is evident from the graph given below:

PedalTune: Customisable throttle response-pedal-box-response-graph.png

As can be seen the signal modification basis the program chosen is non linear and varies by the degree of accelerator input provided.

Quoting the specific bits from the site:

"Throttle response has less to do with how much power a vehicle has but rather how long it needs to fully release this power, with petrol engines frequently performing better here than diesel ones in this regard."

"What are the benefits of the PedalBox and why do vehicle manufacturers produce standard throttle responses instead of improved?

Two reasons:

First, manufacturers take into account their respective markets and use standardization in order to reach a big amount of customers.

Second, the engine control unit is designed in a way that the individual driving style governs engine performance. If, for example, someone frequently drives at full throttle, the controller will be induced to work more dynamically through the engine control unit. The higher the speed driven, the more signals will be sent out from the pedal. During day-to-day driving, this is difficult to achieve for any significant length of time and so the engine control unit lowers the engine's response once again. And here come the benefits of the PedalBox into play. It is an additional control unit, with four user-selectable programs, that increases throttle response by removing delays in the accelerator, enhancing drivability you control! Plus, the new memory function stores all individual settings"

"If I would like to drive in a more dynamic program, is it sufficient to press the accelerator more often?

No, pressing the accelerator more often will not work because the human foot is not as fast as the electronics of a car and if you do this constantly you will damage the potentiometer and the transmission of your vehicle."

The following Youtube Video beautifully summarizes how this device functions:

How I evaluate it is that this device enables one to have the inherent power of the car made more accessible and usable. It provides the user the flexibility to modify throttle characteristics to suit ones individual driving style.

That said I have ordered the Pedal Tune and is currently in transit for my Vento 1.2 TSI. As I was eager to try this out, Frank obliged me by catching up and giving his car to drive and experience.

For the first few kms I drove in standard mode (Pedal Tune Off) to get acquainted with the native throttle characteristics of the car. Post that Frank switched on the Pedal Tune to Race mode with maximum setting. Oh boy! As Frank mentioned earlier words are difficult to describe the feeling! The car transformed into a totally different beast! The way it behaved when you pressed part throttle, the way the torque boost kicked in was totally different compared to the stock car.

I even tried emulating the same experience by switching off the pedal tune and simulating by pressing the accelerator harder but that did not give the same result. Thus proving the theory mentioned above.

I now await my pedal tune and am eager to try on the Vento TSI and evaluate how effectively it transforms the driving characteristic of a more heavier car with essentially the same engine of the Polo.

Thanks to Frank for letting me try out his car. It was indeed a fun drive!
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Old 1st October 2016, 14:41   #48
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Default Re: PedalTune: Customisable throttle response

Ok so finally I did get the Pedal Tune for my Vento TSI. Installation was a minute's job of simple plug and play.

As was seen in Frank's Polo, even in the Vento TSI the throttle response of the car was modified and varied by the different modes selected in it.

While have not clocked a lot of kms hence would not be able to comment on the impact on fuel efficiency. However with the race mode, I observed that the car was holding on the lower gear for a longer time and would in 3rd / 4th gear rev up to 4000 rpm in D mode. I would typically have to upshift by letting off the foot from the throttle so that the car would shift to a higher gear in D mode.

I guess would need to try out various modes permutation and combination to arrive at what best suits my driving style in the long run.

That said the car felt more peppy and agile resulting in the usable power of the car been made more accessible by a slight tap of the accelerator.

To further study what the device was actually doing, I connected my OBD2 ELM 327 adaptor and fired up Torque app. On that I opened the accelerator throttle position meter. By default it was at ~16%. With Pedal Tune Off, I pressed and found the % increasing in a linear fashion.

Then with Pedal Tune ON I saw the % drastically shooting up in a certain band depending on the mode selected. Also with that I could observe the different characteristics in acceleration with different modes been selected. This I would say is pretty much in line with the graph I had posted in the earlier post.

With the higher extent of the accelerator been pressed the corresponding additional voltage added by pedal tune correspondingly minimized.

Hence in summary it is an interesting mod which changes the driving characteristics of the car and gives you multiple options for that. Once you get used to driving with it, you would rarely want to drive without it.

Also from a safety standpoint the option of switching off in specific weather or road conditions is beneficial so that one does not go over board and drive within safe limits.
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