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Even on
only a slightly tuned Natural Aspirated (NA) engine, the exhaust system is
a key to high performance. Morgan 4/4, with the Kent engine, is
standard using a banana manifold 4:1 and a one silencer system.
The
4:1 manifold should be best for top power, but if you go for torque at
lower/mid RPM, a 4:2:1 manifold is better. It is also important with a low
back pressure silencer system. The Ford Kent engine is very sensitive to back
pressure.
I
started out with the 4:1 standard manifold and a 2” pipe and a standard
silencer.
A dyno power curve
indicated that the manifold was not good enough. |
