Chasing wastegate issues...not sure if boost pressure is logging correctly?

[addaea]

Trying to figure out some wastegate/boosting issues so I'm trying to compare my boost at the compressor with boost readings at the intake manifold(via the MAP sensor).

I have a 2bar MAP sensor(GM12615136...200/10kpa offests set in the tune) anyways, I found these threads below and I think I have the proper setup and PIDs needed/deleted to log boost but I just want to double check. I included a log I just ran, but I definitely think the reading I'm getting is incorrect...no way the car is making .45psi, when the gauge(boost only gauge) off the compressor is reading 5-7 psi, I doubt there's that much loss. Car needs a slight retune since some exhaust leak repairs, but it made 493whp...which is why I know that psi reading is incorrect and I'm most likely missing something in the scanner setup...any help much appreciated.


https://forum.hptuners.com/showthrea...-Logging-Boost
https://www.ctsvowners.com/threads/l...-0-help.58370/

important parts of the setup are stock 5.3, twin 62/65s, 80# dekas, GM 2bar MAP

[ryan_axberg]

your logging a one bar map instead of a 2 bar. one bar only reads to 105 kpa.

[5FDP]

Yup, Ryan is right. Remove the 1 bar channel and replace with the 2 bar channel, now it will read all the way to ~15psi.

[addaea]

Thanks guys!