Cut and fit the primary pipe for #3 cylinder. Got the end that fits to the exhaust pipe at the cyl head to the 2nd bend almost done. Tack welded at the exhaust pipe adapter, but it needs better alignment. Will finish it tomorow.
Researched the best pipe size and primary length using Engine Analyzer Pro. I settled on 1.250 diameter with primaries 28 inches long. Checked information from CAFE experiments on Lycolming exhaust pipe design to verify my findings.
