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This
work is not entirely necessary but would add up to a head that will last
two to three times the miles that a standard cylinder head would. The engine
would start easier, tick over better and run stronger and cleaner. Not
like new but better than new!
Some engines do need some other specific work done though. Due to the additional heat and characteristics of the flame front of unleaded fuel, some exhaust ports require a little gas flowing generally around the guide housing when pinking continues even after unleaded conversions. We have discovered that this comes from the heat being reflected back into the combustion chamber and the only remedy is removal. After a high end unleaded conversion like this, it is not necessary to change the timing of the engine - but it is necessary to lean out the carburettion slightly. |
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