>From what I have seen the same happened to Z heads in 77. They don't flow
nearly as well as the earlier Z heads when they put a steel sleeve inside
the exhaust ports and changed the port's shape.
Mike
----- Original Message -----
From: "Brian Hollands" <bholland@hayes.ds.adp.com>
To: "Datsun Roadster Mailing list" <datsun-roadsters@autox.team.net>
Sent: Wednesday, March 06, 2002 9:12 AM
Subject: RE: going to look at engine, now NAPS-Z
> Honsowetz talks about the NAPS-Z in his book as it is a variant of the
> L-series engines. Even though the head is cross flow, and as I recall it
> has hemispherical chambers as well, the ports are way to small to flow
much
> and can't be made much larger.
>
> Brian '69 2000
> Tampa, FL
> http://web.tampabay.rr.com/oilleak/
>
>
> -----Original Message-----
> From talk on the 510 list the NAP-Z is designed
> especially for low emissions and no one has
> ever developed any go fast parts for it.
> You would think there would be performance
> improvements, it has a cross flow head and all.....
>
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