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Old 05-25-2005, 11:02 AM   #62
Scooby Specialist
Member#: 27108
Join Date: Oct 2002
Chapter/Region: MWSOC
Location: Detroit-ish, MI
2004 STi
2004 A4


Originally Posted by crazymikie
I have used Deltadash with a UTEC and some of the readings are incorrect. The UTEC fudges signals to change the behaviour of the car (inherent to a piggyback), so the DeltaDash will read the altered signals from the UTEC. On top of this, I believe there is a 3PSI offset for boost readings for some reason.
I agree.

It's not that they are "incorrect"... DD is reporting *exactly* what the ECU is seeing (UTEC-modified MAF and MAP signals).

- The UTEC tweaks the MAP sensor signal going to the ECU to avoid hitting fuel cut.
- The MAF value that the ECU sees is tweaked by the UTEC's fuel map and OLF injector settings.
- Ignition timing values logged from the ECU are obviously not being used if you are using a UTEC ignition map... regardless, the knock correction and IAM values read from the ECU can be used as an indication of how "happy" the ECU is with the UTEC tune.

However, I don't think this the problem cpturbo is experiencing.
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