Originally Posted by lukeskywrx
Don't boost hard in 5th unless you are shifting there from the top of 4th, problem solved.to get peak boost in lower gears you have to run high WGDC, in high gears that causes the oscillations as the car overshoots and tried to correct. If you want perfect boost in 5th you may have to give up a little spool in the lower gears.
I have heard the above statement of not going WOT in 5th gear many times.....but I would think that the tuner could fix this and lower the boost. My car was doing this as well on the td04 stg 2 tune and I have a GS 3port....so I had him lower the boost by a few psi and its gone. HOWEVER, I dont go wot in 5th, if im on the highway and wanna get moving.... I downshift and rev match into 4th and get on it.......thats just me though.