[Roadsters] Rescue Head

[Pete Peters]

I've heard/read the same thing, i.e. the 210 is the least desirable for most
folks.

Yes, there's round and square exhaust ports. The round exhaust ports are
usually on the '77 and later W58 head.

Pete

-----Original Message-----
From: datsun-roadsters-bounces at autox.team.net
[mailto:datsun-roadsters-bounces at autox.team.net] On Behalf Of John F
Sandhoff
Sent: Monday, April 04, 2011 3:30 PM
To: jim roosevelt
Cc: datsun-roadsters at autox.team.net
Subject: Re: [Roadsters] Rescue Head

> I was at an estate sale this weekend and found a Nissan head...
> It has "Nissan Japan 210 " on the side...

>From <http://datsun510.wikia.com/wiki/Nissan_L_engine_cylinder_heads>:

===
"Semi Peanut

This is by far the least desirable of the three type of combustion chamber
designs. The semi-peanut combustion chamber is commonly found on 210
casting cylinder heads from US market L-16 engines. It has less quench
area than the true peanut chambered heads and less combustion chamber
volume (aprox. 38.5) than either of the other two designs."
===

It's on the web, it must be true :-)

However... another list member says it's desirable, so I dunno.....
Of the three listed styles, this head appears to be by far the
highest compression (open=45.2cc, peanut=41cc, semi-peanut=41cc).
And if it's been cut, then it's even higher...

On L engines, wasn't there something about round vs square exhaust ports?

-- John
     John F Sandhoff   sandhoff at csus.edu   Sacramento, CA
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