I'm trying to figure out, why does the L28 have such higher compression then the L24's? I know its not entirely the head, and both engines have flattop pistons, so what gives it such high compression? Is it the stroke on the crank? Or is it the larger diameter of the cylinders? I'm wondering if it would be possible then to put a 2.8L crank into a 2.4l engine. If so, what rods will I use, or are they the same? I'm just wanting to get some higher compression in my 72 240z motor without actually switching blocks, I would like to slap an N42 head on there, but the compression in my stock engine would drop if I do that, so I'm seeing what all I could possibly do? Thanks

IF you just want higher compression get a thinner head gasket, or get the head shaved...a whole lot easier than changing the crank!:classic:

Cheers!