data logger OBD2 TPS/PPS question

[Shannon Whitehead]

#330177

I know on other SRT products I own max throttle position only shows up as 76% and minimum reports as something like 14% via obdII data but I’ve yet to do any data logging on the Viper. I have physically verified the throttle valve to be at wide open position when reading 76% via the tps on the other platforms.

[MomentaryRacing]

#330653

not unusual for OBDII TPS. If you use AiM, you can create a math channel and scale the values to “stretch” 14%-75% signal to 0% to 100%. See screenshot with highlights of which values to configure once you “Insert” a new channel in the Math menu.

Full formula:

IF(GT((OBDII_TPS – 14)*1.9,100),100,IF(LT((OBDII_TPS – 14)*1.9,0),0,(OBDII_TPS – 14)*1.9))

OBDII_TPS_Scaled.jpg

[Stubbygda]

#330797

folks, thanks for input!! i figured somebody else was looking at these crucial parameters. thanks for formula i will add it in. just wanted to make sure i wasnt missing a little extra throttle u can never have enough of that lol.

[Shannon Whitehead]

#24857

I am using the aim solo/dl data logger in my car at the track and when I look at the TPS (throttle position sensor) or PPS (pedal position sensor) from the obd2 output neither shows 100% even tho I know I am flat out on the pedal. Are others seeing the same thing on their aim data? I also would have expected these numbers to be closer but seems that the PPS is almost always higher than the TPS. When I believe that I am full throttle the PPS shows low 90%s and TPS high 80%s. I know the TPS is learned and I’m wondering if maybe mine is not calibrated correctly??

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