I don't mind washable dry filters but it has been shown that oiled filters are fine when they a fresh and clean but clog up quickly with the accumulation of dust.

My daughter's Guzzi caught fire when it backfired and set alight the oiled pod filters that I had fitted. Fortunately a quick thinker on the veranda of the pub that it was parked in front of put out the fire using his shaken up beer bottle as a fire extiguisher. Following that episode I fitted a conventional air box from a sports model.

Dyno testing that was done on on motorcycles fitted with various filters and exhaust systems actually sometimes showed a loss of power over standard unless a re-map was done to tune the system to the new configuration.

I don't know about the original Morgan ECUs but my Omex ECU is set to ignore the sonda lambda sensor fuel adjustments after 4000 rpm. From that point on it simply feeds the fuel as per the map so the fuel map has to be correct and for maximum performance and is normally set a little richer than stoichiometric air–fuel ratio as achieved by the closed loop feedback using the sensor.

If the airflow is dramatically improved it may mean that the engine is running too lean at high revs and driving for extended periods in that condition could damage the engine. Fortunately few Morgan owners would be travelling at more than 4,000 rpm for an extended period on public roads so damage would be rare. Something to keep in mind if a modified, and not remapped, road car is used for a track day.

Last edited by Gambalunga; 20/12/18 05:31 PM.
Peter

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