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

if you need weight for L series head, let me know. i have a spare lying around.

You will find that all Nissan 4-valve heads outflow the 2-valve heads for similar size engines.

What are your calculations for the KA24DE from the U11 Bluebird? Also do not forget HR16DE.

I just edited post it should read HP per kg, I had this
dilemma with a friend trying to choose either a gen3 v8
or toyota lexus twin cam v8. Power to weight regardless
of the technology the Chev pushrod heads came out on top.
Looking at the bottom ends hp to weight the chev again.

Bakat yes please if its complete with rocker cover.

Id love to have those weights for those heads DD.
My guess is the GA16DE is around 20-21kg or 10% less than
similar sized ca18de and the KA24DE 5% more than SR
while the QR20DE in between the CA and SR.

Sorry can't resist- is there any such thing as bad head?







(yes there is)

not from the stories you and Levy tell...

Bad head? yes she had braces and back on topic the CA20e
is the most horrible casting Ive yet come across in
alloy and its cast here in Oz!! Cast iron Ho-dens rule.

Even a suzuki g13b head with 16v make max 200hp NA and
weight about 18kg or about 11.1 hp per kilo.

So far the A series is the best power to weight followed
closely by the L series which if from Stories I heard
can make max 238hp with 2v then 18.75 hp per kilo.

The A series is still on top