Hey everyone this is my first post ever. I've run into a little problem lately......I just got my car fixed up nice with a new Apex-i N1 exhaust, a centerforce dual friction clutch, and a header from racing beat. Also I wired the 6ports open and removed the ACV and airpump. This is on a 90 N/A. The problem is now my car feels slower than ever. It used to zip right through 1st to almost 40mph then in 2nd I'd reach a little under 70mph but now it seems sluggish through all gears and I can barely hit 60mph in 2nd. I can't think of any reason for this. I checked for vaccum leaks and disconnected wires/sensors but there aren't any. The only thing that came to mind is that the header moved the O2 sensor about 2ft. farther down the exhaust.(maybe this changed the reading???) Anyone have ANY ideas?

 

No torque. I have many of the same mods, and that is why. I bet above 5k RPM, in 2nd and up, the car pulls hard enough to push you back in the seat, right? Mine does this. just the payoff, you remove all kinds of weight, now you have to deal w/ boggig down. Try to launch a little higher. I raced a RSX Type-S last night, and I launched at 3500RPM, and I was quite able to hand his *** to him with the same mods you have, however, he still beat me off the line.