I just got my 2014 fiesta st and i was wanting to get a BOV for it. Does anyone know what size outlet I need?
I dont think vta is bad in this car as it isn't maf tuned.DO NOT get a BOV. If you absolutely needed to get a BPV (bypass valve). Anything that vents to air is not good (BOV).
If you get an intake it will sound like you have a BOV. No one would know the difference and your car would thank you for it. BOV's are ricey.
VTA with a MAP sensor is ok if you really need to install a BOV, but when you run a BOV to atmosphere with a MAF sensor, the engine will run very rich for a short period of time after a gear up change because the intake air that was recirculated has now been vented. The ECU has been signalled by the MAF sensor to injected a set amount of fuel according to the volume of air measured by the MAF sensor. Because some of this air has been vented the engine will run rich and may even stall between gear shifts.I dont think vta is bad in this car as it isn't maf tuned.
A lot of aftermarket BOV's have been shown to leak. Even some higher end offerings. The best typically come from Tial.I never had any problems running vta ok my speed6 with the his. Gurgled a bit more in between shifts but that's it. An ssqv like the hks shouldn't be open at all under acceleration and ive never heard any complain a out the downhill thing either