Gas Pedal Delay

ChrisSlicks

The stock pedal sends a voltage of 0 to 5V to the ECU to let the ECU know the pedal position, the voltage change is linear but the ECU can react to this voltage anyway it likes. The SprintBooster simply increases the voltage coming from the pedal such that you reach full voltage more quickly, i.e. you are shorting the pedal travel because the 3/4 pedal position is now WOT. You can do the same exact thing inside the ECU, so I say don't waste money on this just buy an UpRev license and do much more.

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Hotchkis ARB | Stillen CAI | Art Pipes | Berk CBE | Stillen AP Racing Brakes | AE Performance Oil Cooler | BC Racing ER Coilovers | Doran Control Arms

christian370z

Ah, so a good tuner can adjust for throttle delay within UpRev (I would assume SpecialtyZ or Technosquare can do this). To what degree can you adjust those parameters on the ECU?

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ChrisSlicks

There is no delay per se. There is the throttle position to actual map (you can see these values reading the live scan data via OBDII). The other parts of the puzzle that slow response are the electronic intake control and the VVEL itself. Tuners can address the first 2 currently but none have made available the latter. Bandaid parts like the SprintBooster attempt to address the first issue only by giving you a lead foot. In the process it destroys linearity so trying to feather the throttle through a corner becomes more difficult.

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Hotchkis ARB | Stillen CAI | Art Pipes | Berk CBE | Stillen AP Racing Brakes | AE Performance Oil Cooler | BC Racing ER Coilovers | Doran Control Arms

6spd

yes, everything you said is correct. my first instinct was "this is simple tom-foolery, it is just changing the voltage per percent of pedal travel". So in theory the same effect can be had by simply pressing the gas pedal farther and faster. This may be simplifying it a bit, but it is in a sense what is occurring. I'd still rather have a reliable tune than a questionable (reliability-wise) trick.

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DIGItonium

This is the problem I have. I can literally floor it in 2nd, and it feels like accelerating in 6th. There's no wheelspin, and or back against the seat feeling. The engine doesn't scream either. When making a left turn and giving it roughly 30-40% steady throttle in 1st, the car hesitated around 2k in the middle of the turn instead of linearly accelerating regardless of VDC mode. What's more confusing is that this problem comes and goes.

Last night when I merged I did the same for 3rd and 4th. I didn't quite floor it, but the car jerked back and accelerated hard pushing me into the seat.

I don't think the SprintBooster will help because I can literally floor it on a roll, and the car can hesitate at random times regardless of VDC. However, on first start and initial minutes of driving it pulls hard. After an extended period (15+ minutes) of driving is when the described problems creep up.

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