Re: PA50 / Hobbit Performance Exhaust Project
- Author: Raymond Rexroad (---.neb.res.rr.com)
- Verified User: rarexro
- Date Posted: 08-12-07 20:34
- Attachment: 1186965243_cylinder_closeup.jpg
Ok, if you’ve read the past posts, you know that we have a PA50I cylinder, and it is commonly known that a PA50II muffler will not mate up with a PA50I cylinder. So, I looked around the garage, and found an oxygen sensor bung that I had bought for my Ford project (to weld on a header). This standard bung was a very good fit for the cylinder, and also mated well to the PA50II headpipe. The inside diameter off the bung provides no restriction for the PA50II headpipe as well.
Anyway to implement the idea, I needed to replace the exhaust studs with longer ones. Easy.
I cut the headpipe from the PA50II muffler, and did several trial fitups, then cut it shorter, and then shortened the end of the muffler. Since the PA50II muffler headpipe could pivot on the cylinder, and amount of adjustment was available to get the best fit.
I had bought three copper unions, a straight, a 45, and a 90 degree angle. The straight not only looked the best, so it was used.
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