Tim240z Posted February 21, 2002 Share Posted February 21, 2002 Can one of you inliner Gurus give some help on all the head numbers (codes) used on Datsun heads from the 240s to the 280s, and their interchangability (combustion chamber size/comp. ratio). I'm sure that there must be a list like this on a site somewhere, but I can't find one. I see mention all the time about certain heads being better than others...is this 'cause of flow numbers, or comp. ratios. Reason?: I want to increase the displacement of my 240Z to 2.8 (by getting a 280 JY motor), and have two 240cc engines (1 in the car, and one in the garage), so would these heads work better than the 280 heads? Thanks, Tim Quote Link to comment Share on other sites More sharing options...
DAW Posted February 21, 2002 Share Posted February 21, 2002 All 240Z heads have smaller valves than 280Z-ZX heads. Consider the 240 heads only if you're planning on installing L28 valves in them. DAW Quote Link to comment Share on other sites More sharing options...
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