Modifying Engines to run on unleaded petrol

Engines made before 1989 may need modifying to run on unleaded fuel. The process involves the machining the old exhaust valve seats in the cylinder head out. New hardened inserts are then pressed into these pockets having an interference fit. It is also normal to retard the ignition timing.

For more information on Modifying Engines to run on unleaded petrol talk to Amac Engineering