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Re: Sound of an IH inline six
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Posted by Bob M on January 05, 2007 at 10:34:12 from (151.190.254.108):
In Reply to: Sound of an IH inline six posted by Quicksilver on January 04, 2007 at 20:20:50:
The exhaust notes of engines of similar displacement and number of cylinders is primarily a function of exhaust manifold design. Also perhaps to exhaust port geometry - though to a lesser extent. Case in point: Years ago we had a pair of Continental F226 flathead sixes on irrigation pumps. One had the exhaust stack connection to the manifold located between #1 and #2 cylinders. The other’s stack connection was taken at the center of the manifold - ie. between #3 and #4 cylinders. The first one’s exhaust sounded somewhat similar to a V8 engine – it had a distinct “beat” to it. The other’s note was smoother – every exhaust pulse sounded the same. Similarly old gas truck engines can have different exhaust note depending on whether equipped with center or end exhaust pipe connections, also whether single or split (dual exhaust) manifolds. The big 50’s era White flatheads and Brockway Continentals come to mind.
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