Nice find, but not a 'new' head...note carbon & rust in ports; has a Helicoil insert in one of the rocker tower bolt threads. It would be nice to know how much the head surface was shaved. Before installing, at the very least, the head should be tanked, pressure tested, guides checked and Helicoil / Keensert inserts installed in the other 3 rocker tower bolt positions, since this area is a known weak point in high stress racing installations. Also, don't forget the steel spring seats when installing the GX double valve springs. GLWS!

Quote:You can use your stock A14 valve springs. All you need to put this to use is a Head Set, set of Mikunis (or DCOEs or Dellortoes), and a spring compressor so that you can fit the valves


Quote:You could expect 85 hp. But if you build the engine to suit this cylinder head -- put a 8000rpm camshaft in and dual valve springs along with flat-top pistons and GX-type (thin) head gasket and tuned exhaust -- maybe 120hp? I don't really know, it's just a guess. This was Nissan's road racing head back in the 1980s, and now the SCCA A14/A15s are making about ~150hp with 14:1 compression and 8500 rpm, dunno if that's engine HP or wheel HP

Quote:I dunno, but you can check out advertisement on eBay, it might be a brand new head (making the valve guides brand new). The valves are obviously used but Nissan Competition sold the head without valves

Are the guides in good shape? Other than a set of dual springs and a Nissan Head Gasket, anything else needed to put this to use?

What could I expect from this with an A14 and dual Webers?

Better than the GX head

It is a "ported and polished" A12T twin carb head. Just like the GX head but lacking the oil passage for pre-1974 engines. And has been fitted with larger A14-size valves. See Nissan Competition Head

Thinking of buying it actually :D

But im building a street 120Y/b210, What HP range would this be in? And would it even drive okay on a street machine?
Also we are putting megasqirt efi/spark + there is alot of talk about supercharging it ;) (SC12)

Is this a GX head, or something different?

Ha Ha and mine makes 3.I rekon i might put it all together with the siddies and hang it all off the side of one of the A14's i have here,then advertise it...where does the time go

Yes funny that there are two of those manifolds for sale right now!

this is a bargain as that manifold alone is very sought after
and worth halve of what he is asking for the lot!!
will sell very quickly