Dr.Jekyll Exhaust = works well on new setup

[Happy240sx]

@nd4boost

first off awesome piece and great write up, couple of questions
when the dump is open are you running a limp mode full rich due to the fact that your o2 bung is on the exhaust side? if that is your o2 bung i think more power could be had (dump open) if the 02 was positioned closer to the turbo
also have you done a pass with the dump closed to see if you lost any power compared to the orig down pipe?
just asking caz im interested in doing somth similar?

I think you need to do mor reading on what an O2 sensor actually does, and the differences between open or closed-loop. I think if you did some more reading you would be able to answer you own questions.