HFC require re-tune?
#4
At the very least, retune BWG turbo control. There is significant back pressure due to the stock cat that had already been tuned in. Reducing back pressure without retune could result in turbo overboost unless other tuning safeguards aren't disabled and configured to perform effectively.
#7
Evolved Member
If not protuned afterward, overboosting from reduced back pressure may compromise engine health. Do you intend to keep the car or to flip it in a few years?
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#8
Car will not overboost without tuning despite some opinions posted. Boost will come on quicker than your ecu map is expecting and error correction will kick in and reduce WGDC as required.
As stated - required = no, but you will get more out of it if you do. If you have more mods planned in the near future I would just wait. You will not damage your car
As stated - required = no, but you will get more out of it if you do. If you have more mods planned in the near future I would just wait. You will not damage your car
#9
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