Go to a 2" mandrel bent system. I have gotten 7 wheel hp with this and
perforated core straight through mufflers on a GA16.
Mike
>I currently have a 96 200sx SE. I have an HS header and JWT intake and ECU.
>I think that my exhaust piping diameter is hurting performance. I currently
>have 2.5" piping from the cat back mated to an A'PEXi N1 muffler. The
>piping is not mandrel bent, however it is very smooth. There are very few
>places where the piping is actually reduced in diameter, granted reductions
>are inevitable on a conventional "crush" bender. After bolting on the
>header and taking it to the track I ran slower times. I thought of a few
>things, I verified timing accuracy, replaced plug wires, and checked
>condition of plugs. The only thing I can attribute this loss too is the
>exhaust piping. My dilemma is that I plan on either doing turbo or N2O in
>the near future. Both of which benefit from larger diameter exhaust piping!
>Should I change it out for 2" mandrel bent piping, and will the 2" piping
>limit performance when I do the N2O or turbo? I noticed your car (Mike)
>sprays with the Greddy exhaust, is this limiting performance with the N2O?
>Well let me know what you think. TIA
>
>late,
>wes
>
>www.wes.nissanpower.com
>
>
>
>
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