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Subaru 07 FXT Stage 3 tune /w VF48

Boost Control

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I have 07 Forester XT with all the Mod's for a stage 3 tune. however, i got a very good deal on VF48 off STI 2018 and 3 port Grimspeed EBCS. I currently have a Etune that i have been happy with for about 2 years now. After going thru the courses there are some small changes to get the air fuel closer to target. on my wot the target A/F is 11.25. driving around town my AEM 14.2 - 14.9. however, the tuner does not respond to my emails for a retune. So my question is could i take the Cobb stage 3 OTS map take my second gear pulls and apply WDC from my pulls to get my boost close to 16.2 im currently at. I would like to see example of start to finish EBC tuning and logging for 02- 07 wrx or fxt in the boost control video. any help !