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Nissan twin cam race heads for A series, were they ever made?
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As per title, I'm wondering if a twin cam head was ever produced by Nissan, as I found one that claims to be from the golden era of racing that was supposedly on a 1300.

Posted on: 2023/1/26 1:18
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Re: Nissan twin cam race heads for A series, were they ever made?
No life (a.k.a. DattoMaster)
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Twin cam...no
Theres a hemi head crossflow design out there though

Posted on: 2023/1/27 9:48
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Re: Nissan twin cam race heads for A series, were they ever made?
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Posted on: 2023/1/27 12:56
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Re: Nissan twin cam race heads for A series, were they ever made?
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Just sold for drug money whatever it was lol

Attach file:



jpg  Capture.JPG (75.90 KB)
12605_63d752ec23296.jpg 1150X508 px

Posted on: 2023/1/30 5:18
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Re: Nissan twin cam race heads for A series, were they ever made?
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WOW!

That's the rear Nissan race hemi AY12 engine. The DOHC version (AZ12 engine) was never made


Great pictures i never seen details like those. Too bad they didn't get a picture of the combustion chambers

* 1973 Nissan works engine
* 160 horsepowers @ 8,800 rpm
* Single-cam engine
* overhead valve (pushrod engine)
* dual rocker arms

Similar to the Chrysler Hemi, except it doesn't appear to have top-down spark plugs but rather they are on the side?

At the bottom of this magazine article page is the design for the DOHC A12 -- buy it's only a drawing

Attach file:



jpg  Auto Technica 1982 no. 164 E64F0468.jpg (192.29 KB)
174_63da0f1011268.jpg 1442X2048 px

jpg  AY12 engine. The shape and size of the head cover are completely related E64F0467.jpg (91.24 KB)
174_63da14f829ef8.jpg 932X768 px

jpg  Crossflow OHV Head A12 E64F0430-1.jpg (79.36 KB)
174_63da159038437.jpg 1150X882 px

jpg  E64F0464.jpg (173.17 KB)
174_63da15e3201fb.jpg 1554X1536 px

jpg  Nissan Crossflow AY12 engine E64F0465.jpg (170.43 KB)
174_63da16048e0cc.jpg 1600X1243 px

Posted on: 2023/2/1 7:34
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Re: Nissan twin cam race heads for A series, were they ever made?
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hi ddgonzal,

thanks for the extra info, much appreciated. here are all the pics i managed to get from the listing.

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jpg  012.JPG (49.67 KB)
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jpg  013.JPG (46.06 KB)
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Posted on: 2023/2/1 10:17
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Re: Nissan twin cam race heads for A series, were they ever made?
No life (a.k.a. DattoMaster)
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Looks like the LZ14 16v cylinder head.

Posted on: 2023/2/1 11:48
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Re: Nissan twin cam race heads for A series, were they ever made?
No life (a.k.a. DattoMaster)
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Yup that's an LZ head and the price is actually really good.

Posted on: 2023/2/2 2:34
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Re: Nissan twin cam race heads for A series, were they ever made?
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That is the Twin-Cam head that was just sold Sunday at auction for $5000


The auction title was Quote:
NISSAN Sunny Excellent Racing Head Twin Cam Head for Race Nissan Works B110 B210 B310 TS Sunny TS1300
Yes, that would be the LZ14 engine which was used in the 1973 Sunny PB210 race car


The auction description was a bit confused:
Quote:
サニークーペエクセレントに搭載されたR390型エンジンのツインカムヘッドだと思いますが、資料が少なく断定できません。
非常にコンパクトなのが印象的です。 [I think it's the twin cam head of the R390 engine installed in the Sunny Coupe Excellent, but there are not enough materials to be sure.]
However, the Nissan R390 was made in the 1990s, used a V8 and was not a Sunny variant. The engine used in the Sunny Excellent was an L-series engine, and the twin-cam racing version was the DOHC LZ engine


All our previous LZ photos show square covers over the cam ends:
Open in new window

But Nissan Global explains Quote:
The head cover has a rounded shape that is different from the later flat type
Yep, hard to see, but the early LZ race car seems to have them. Here's a photo from the old ratdats site:
Open in new window

That seems to match the auction photo:
Open in new window




and final confirmation, the combustion face photo matches the photo from Nissan Global:
Open in new window

auction photo
Open in new window



Here's the last photo from the auction. I think its the exhaust ports

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jpg  ports.jpg (24.49 KB)
174_63db83701877a.jpg 600X451 px

jpg  green top LZ20B.jpg (34.81 KB)
174_63db83fd8a947.jpg 784X377 px

jpg  PB210-LZ.jpg (74.97 KB)
174_63db845fcfda8.jpg 1004X720 px

Posted on: 2023/2/2 9:38
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Re: Nissan twin cam race heads for A series, were they ever made?
No life (a.k.a. DattoMaster)
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Just in case there are no purists for the A series, I found the A14 & A15 short blocks
just as heavy as the stock ca18de and L16 short blocks.

The A14/A15 are heavy nuggets but the L series heads are heavier than A series.

The early non pollution L16 is overlooked engine that can take large pistons
L18 crankshaft and a roller rocker NA20P heady from Alibaba for almost 2000cc

KA24de fits easily to give a cheap twin cam L series hybrid that can use webers.
This one is a highly tuned L series with Ka24de head that made 284hp @ high 7k rpm.
Built by Les Collins for a Perth dude that once owned my vb10 wagon.

http://lescollinsracing.com/images/Engines/Nissan4V.jpg

Posted on: 2023/2/21 11:53
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