Cross Flow Heads?

[Guest shuyun]

Did Anyone besides OS Giken make a single or double cross flow head for the 6 cylinder L motors? And if so can they be found new or used in japan.

[yo2001]

LY28 head used to be an anftermarket optional head from Nissan. But you also need to replace the bellhousing because slant was oppsite. I doubt it still exsist

[HS30-H]

Yes, the LY28 was the "Crossflow" head offered by Nissan as a "Sports Option" part from around 1973 onwards.

This was a single camshaft, two valve, hemispherical chambered crossflow design. As Yo2001 pointed out, the bellhousing for the transmission and the engine mounts were quite different because of the change in angle to the block. The correct pistons also needed to be used, and it was recommended that the Option crank and rod set was also installed.

I've seen quite a few dismissive comments about this head / engine over the years ( especially in the Honsowetz book ) but I have to say that hearing one of these things on song is a sound for sore ears. They breathe really well, and produce good power.

There are in fact a few cars running in Japan with them ( several on the street........ ) and NISMO restored one of their old 240ZR "test" cars for the 2001 NISMO FESTIVAL that used an LY28. It went really well.

We also have a couple of 240's running this head here in the UK. One of them is a street car that does not get used all that often, and the other is an ex-Works Rally car.

Might as well forget about trying to find one of these; the queue is already a mile long ( I've been waiting about 10 years already! ). When they change hands, its usually among acquaintances and for a LOT of money........

 

Alan T.