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Old 11-02-2017, 06:21 PM   #1
Scooby Newbie
Member#: 460290
Join Date: Dec 2016
Question remap after decat

I eliminated the cat in my Impreza of the 2002 sti and I have to remapped to avoid turning with higher turbo pressure and risking it detons.
What tables should I vary and how should I change them?
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Old 01-22-2018, 05:37 PM   #2
Scooby Specialist
Member#: 93812
Join Date: Aug 2005
Chapter/Region: SCIC
Location: Huntington Beach,CA
2004 Wrx wagon
Platinum Silver Metallic


Since you opened up the airflow in your exhaust without any calibration your going to experience boost spiking and possible leaning out. I'd start by reducing waistgate duty cycle in the appropriate RPM cells to counter the boost spiking.
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Old 01-28-2018, 08:26 AM   #3
Scooby Newbie
Member#: 459380
Join Date: Dec 2016

After decat you need to put a Wideband o2 sensor on your downpipe and do a log to analyze your air fuel ratio.
You need also to put the original rear sensor at the free air.
After correct your primary open loop fueling or your boost target maps and WGDC map depend of your logs.
For SP98 with TMIC the ideal air fuel ratio is between 10.5 and 11.
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