As a matter of interest Im getting an enthusiast to
weigh an L series head either l16,18 or 20 all should
be similar but I have the weights of the H89, z18et,
ca20 & ca18de for a bit of comparison in power to weight.

eg.
H89 inc camshaft to be fair even though its in the block.
A15 H89 + cam is 9+2kg? max power 170hp NA
CA18DE is 24kg! max power 240hp-250hp NA
Z18ET is 16kg max Turbo power 400hp % 2 = 200hp?
L18 is 15kg? max NA 220hp

then have to divide all of them by their weight
A15 H89 170hp % 11kg? = 15.45 hp
CA18DE 240hp % 24kg = 10 hp
Z18et 200hp NA % 16kg = 12.5 hp
L18 220hp % 15kg? = 14.666 hp
SR20DE 300hp % 28kg? = 10.71 hp