The 8v doesnt flow as good as the 16v at the end of the midrange and top end
but thats just it and manufacturers round the world are adopting the turning off
of 2 valves on a 16v till the rpm rise above 4-5k.

I can get the 8v heads for nothing and are everywhere the same goes for the ca18de but
Im anal about weight and torque, i want less weight and low/mid range. My driving style
is 95% under 4500 so hence the choices Ive made.

I didnt really want to make this thread an 8v vs 16v thread, Mik thanks for answering
the pollution side for me.

Also if an A series without pistons oil squirters, no extended skirt like on L series
and no bearing brace can make 320hp atw I dont see how the ca18de block could be any
worse with its modern webbing and less friction sohc design.

The choice was an A series block with full sleeves and offset ground crankpins and E series rods for 1800cc or a stock 1.8 litre already ca18de with ca20e head.