I have done a number of exhaust systems on carriers in the last couple years, and while mine are not 100% as original, they are off the shelf and quiet.
I gat a pair of 1.5" pipes about 6 feet long with 90° bends on the ends. I have the muffler shop match up as closely as possible a pair of mufflers to the original example that I have. I get a pair of tailpipes bent up as per original. Loosely clamp the mufflers in place, and shorten and adjust the 6' pipes to match up with the mufflers. Usuallly the mufflers they find me have larger openings than the 1-1/2 pipes the carrier uses. By using a piece of 2" pipe as an adapter, the mig will close off the rest..
For the pipes from the manifolds to the floor, I clean and clamp the used flanges to the manifolds, and through trial and error get a pair of 1-1/2 pipes with the appropriate bend to fit to the flanges. I tack them in place while still on the engine, then remove them and weld them on the bench. Note they will be fairly loose into the flanges on the floor. The originals have a bit of a ball on the bottom to allow flexing. This can be replicated with heat and a ball peen.
End of the day, the exhaust my not pass muster for a 100% original inspection, but it will function nicely and is quiet. A carrier engine (or any Ford flathead for that matter) should whisper. Total outlay should be around $250 (Cdn) for the complete system.
|