TomCrowley Posted July 14, 2013 Share #1 Posted July 14, 2013 I have an older 240z engine built up mildly (Cam and valves) but after pulling the head off i can see a few cylinder walls are trash. It has an 83mm bore which from my understanding is stock 2.4l and the options I am seeing is bore it to clean it up and then gain some hp but I would have to but oversized pistons, or if it is possible put the heads on my l28 280z engine and do a rebuilt on it and bore it out a little and do some modifications. I only recently got into the Datsun world so I dont know a whole lot but if you guys have any better ideas I would love to hear them. I am 17 and my 280z is my senior year project. Link to comment https://www.classiczcars.com/topic/46970-are-240z-280z-heads-and-cam-and-valves-interchangeable/ Share on other sites More sharing options...
madkaw Posted July 14, 2013 Share #2 Posted July 14, 2013 I would do what is the most cost effective. Have you looked at the cylinders on the 280 motor yet? These bottom ends are pretty bullet proof and most of the time it's just the head that needs the real work. Yes that head will work on that l28 block. You need to do some research ! Considering this is a school project I would think that would be part of your homework:)Things to considerCR - small chamber head on bigger bore= high CR Link to comment https://www.classiczcars.com/topic/46970-are-240z-280z-heads-and-cam-and-valves-interchangeable/#findComment-427627 Share on other sites More sharing options...
EuroDat Posted July 18, 2013 Share #3 Posted July 18, 2013 Download the FSM's for both engines and do some reading in the engine chapters. Any of the 280Z and the 240Z manuals will get going it the right direction. See link for manualsXenonS30This site will give you an idea of what is possible tooDatsun L-series ZCAR engine modificationsChas Link to comment https://www.classiczcars.com/topic/46970-are-240z-280z-heads-and-cam-and-valves-interchangeable/#findComment-427925 Share on other sites More sharing options...
EuroDat Posted July 18, 2013 Share #4 Posted July 18, 2013 (edited) Double post. Lost my connection for a minute...... Edited July 18, 2013 by EuroDat Double post Link to comment https://www.classiczcars.com/topic/46970-are-240z-280z-heads-and-cam-and-valves-interchangeable/#findComment-427926 Share on other sites More sharing options...
71Nissan240Z Posted July 18, 2013 Share #5 Posted July 18, 2013 Download a book called "how to modify your Nissan/Datsun oho engine" it is a must for frankenstien engines concoctions. Link to comment https://www.classiczcars.com/topic/46970-are-240z-280z-heads-and-cam-and-valves-interchangeable/#findComment-427927 Share on other sites More sharing options...
71Nissan240Z Posted July 18, 2013 Share #6 Posted July 18, 2013 Ohc engine* Link to comment https://www.classiczcars.com/topic/46970-are-240z-280z-heads-and-cam-and-valves-interchangeable/#findComment-427928 Share on other sites More sharing options...
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