Fair enough. Like I said, get down to repco and buy a 1/8th thread smallest size nipple and maybe the next one up. Make that your MBC inlet nipple or you could run the mbc outlet nipple on the inlet side and put the repco one on the back end. Plumb it in front of/in series with the N75 again and give it another go. Moral of the story it will run waayyy better if the N75 is still active. Its just a matter of playing with MBC inlet sizes until you get sufficient flow through it so that you can adjust from where stock boost was upward. With it adjusted close to fully open, just keep enlarging the mbc inlet till you get to that point. Keep in mind you can't keep enlarging the inlet size if it gets to the point where its bigger than the mbc outlet size. At this point you need to enlarge the outlet and then start again on the inlet side.