Originally Posted by BLKFIN
4. SC pulley along with a LET re-tune. I also might need larger injectors at this point......In my opinion, the 178 + the SC pulley will compliment these NW Intake mani's quite nicely. I saw about 2.5 to 3 psi decrease from adding the NW mani's so by adding the SC pulley, we would not be maxing out the map sensor as Eleventeen did.
Has everyone with these manifolds seen a decrease in boost levels?
I can only answer you from my experience. I was running 19.5-20lbs at the top of 3rd gear. Now im seeing around 17.5-18lbs. I would assume the reason for this is the added volume of the mani's.