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Old 01-07-2006, 05:11 PM   #1
Scooby Newbie
Member#: 42177
Join Date: Aug 2003
Location: Sharon, PA
2005 STi

Default FMIC untuned on StreetTuner stage 2?

I have an 05 STi with a FMIC, short ram, turboback, and a tweaked stage 2 street tuner map. The map was tuned on a KN typhoon and turboback, with advanced timing and 11.1 AFR at WOT, tapering down to about 10.5 at redline.
I am running that map right now after I just installed the FMIC. My question is how safe is it to run untuned? I plan on getting a gt35R and supporting mods late spring/summer and getting it Protuned. Should I go to a more conservative map (ie. richer) since the FMIC leans out the car? i dont go flooring it around town but it would be nice to hit some spirited runs.
Im split because some threads say dont go into boost until you get tuned and others show people running FMICs on the stock ecu, no AP.
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Old 01-07-2006, 07:15 PM   #2
Scooby Specialist
Member#: 96668
Join Date: Sep 2005
Location: SW Missouri
2006 WRX TR


id say it might make it richer than leaner...since the cooler air
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Old 01-07-2006, 07:16 PM   #3
Scooby Specialist
Member#: 50596
Join Date: Dec 2003
Chapter/Region: SCIC
Location: 818, SoCal
04 wrx breakin
necks in JBP sucka!


Id say don't do that dumb stuff and get it tuned!
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Old 01-07-2006, 10:31 PM   #4
Scooby Specialist
Member#: 83924
Join Date: Mar 2005
Chapter/Region: MWSOC
Location: Cleveland, OH
2005 HTA 86 STi
10.66 @ 136 mph


You will be running safer now because your motor is seeing less boost. After I installed my FMIC, I lost about 2psi because of the length of the pipes. We adjusted the WGDC on the StreetTUNER program and solved that problem. Check your boost gauge and see what it's doing.
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Old 01-08-2006, 01:24 AM   #5
Scooby Newbie
Member#: 33296
Join Date: Feb 2003
Location: cali

can you explain how a fmic makes the car lean?
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