240ZBUILTBYME Posted July 5, 2022 Share Posted July 5, 2022 Hi all Thought I would start a thread topic on the JMC head project as from what I can tell no one has done so already. would be interested to know if anyone in Australia is planning a build with one of these. for those living under a rock JMC designed and manufactured a brand new L28 head with various improvements over the oem N42 head. - larger intake/exhaust ports with a uniform 2.5mm thickness between ports - reshaped combustion chamber designed for higher compression - redesigned water jackets to improve cooling Overall aiming for a better flowing and more durable head for tuning the L28 Website supplying the US: http://bluemoonperformance.com/project-l6/ has spec sheets and pricing chart video of the head in action Video where they CT scan a worked genuine L series head and found a port wall thickness of 1.2mm The price for a head is around the $7-8k AUD mark. So a significant investment. I haven’t seen any testing or performance/dyno figures with and without the head for example. discuss. gav240z 1 Quote Link to comment Share on other sites More sharing options...
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