I recently purchased a Hobbit Jamarcol pipe through MA (thanks Raniel) for my '82 NU50m and tonight I bolted it on, made a quick bracket, and took her for a test drive expecting big things...
First thing I noticed was how loud it was compared to the stock pipe, but as I gave it gas I also noticed a loss in acceleration... Not to worry right, I read all about how the low end may suffer with a performance pipe on this forum. So I proceeded to ramp it up to full speed... this is where my heart dropped.
No power band, no increase in top speed, much slower acceleration all the way through.
What's the problem? I was getting a top speed of 29mph out of her before, and I was hoping for a cool 34-36 with the addition of the pipe. But now all I have is a very loud Urban that takes 4 blocks to get up to 28. I know a high-flow air filter should help, right? But that can't be the only issue, can it? Any adivice?