Posted by JMOR on October 09, 2009 at 06:10:00 from (72.181.156.161):
In Reply to: Dual Exhaust on M posted by Terry Gowen on October 09, 2009 at 05:03:29:
Redwolf said: (quoted from post at 08:24:25 10/09/09) Yes, it could be done. Problem you must overcome is keepeing enough backpressure in each exhaust tube and keeping tube equal length. the equal pressure and lenght will allow the engine to run the most effiencient. A extreme difference in backpressure will cause the motor to run lean in one cylinder and not another. This would be a tuning nightmare as you would have a tough time controlling the fuel mixture.
So in short, neat in theory, almost impossible in reality.
Good luck!
Ideals.! However, all cylinders are not equal length now, as from factory. Clearly the two center cylinders are closer to the end of exhaust pipe than the two outer cylinders by roughly half the manifold length. Furthermore, any single exhaust "V" engine (V6, V8, etc.) has 2 or 3 feet of cross-over from one bank to the other, with the exhaust pipe exiting to muffler from only one bank. A 2 or 3 foot difference & they have been running like that successfully since 1932 on Fords and even longer in a few others.
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