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Main : Mechanical : Engine head A12 heart-shaped

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head A12 heart-shaped
head A12 heart-shapedPopular
SubmitterddgonzalMore Photos from ddgonzal   Last Update2003/4/20 7:39    Tell a friendTell a friend
Hits7825  Comments10    0.00 (0 votes)0.00 (0 votes)
A12 cylinder head high-compression round ports.

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The comments are owned by the poster. We aren't responsible for their content.

Poster Thread
Frodaddy
Posted: 2005/7/20 6:31  Updated: 2005/7/20 6:31
Home away from home
Joined: 2003/5/4
From: Christchurch, New Zealand
Posts: 339
 Re: head A12 heart-shaped
I have one of these heads that was on my A12. It has, however, the manifold stud pattern for the early A12 single bolt manifold. It definately is round port and has these heart shaped combustion chambers. I will post a pic. Just wondering where they came off?

Poster Thread
ddgonzal
Posted: 2005/7/20 16:41  Updated: 2005/7/20 16:41
Moderator
Joined: 2001/5/3
From: 48 North
Posts: 31575
 Re: head A12 heart-shaped
Tech section article: A-type Cylinder Heads

Poster Thread
rb20
Posted: 2005/7/20 16:55  Updated: 2005/7/20 16:55
No life (a.k.a. DattoMaster)
Joined: 2004/8/29
From: south australia
Posts: 1532
 Re: head A12 heart-shaped
i think i also have one of theas heads in my colection

Poster Thread
Frodaddy
Posted: 2005/7/21 8:39  Updated: 2005/7/21 8:39
Home away from home
Joined: 2003/5/4
From: Christchurch, New Zealand
Posts: 339
 Re: head A12 heart-shaped
It is just that the tech section did not know what this head was and asked for any information on it.

Poster Thread
sundat1200
Posted: 2007/8/20 2:49  Updated: 2007/8/20 2:49
Home away from home
Joined: 2006/9/21
From: San Jose, California
Posts: 257
 Re: head A12 heart-shaped
what number is this head? the 728? Was it successfully ported to the lines drawn on the intake gasket face?
This head is looking like a well kept secret. Good chambers and lots of flow potential?
I just inherited one of the 728 heads. I'd like to know more about it!

Poster Thread
DatsunSSS
Posted: 2007/8/20 3:32  Updated: 2007/8/20 3:32
Home away from home
Joined: 2003/2/14
From: Portugal
Posts: 472
 Re: head A12 heart-shaped
my 728 head have a differente combustion chamber

Poster Thread
ddgonzal
Posted: 2007/8/20 3:51  Updated: 2007/8/20 3:51
Moderator
Joined: 2001/5/3
From: 48 North
Posts: 31575
 Re: head A12 heart-shaped
It's hard to tell from the photos. How are they different?

Poster Thread
DatsunSSS
Posted: 2007/12/13 20:50  Updated: 2007/12/13 20:50
Home away from home
Joined: 2003/2/14
From: Portugal
Posts: 472
 Re: head A12 heart-shaped
i think the heart shape is not the same.

Poster Thread
clyons8
Posted: 2007/12/13 23:45  Updated: 2007/12/13 23:45
No life (a.k.a. DattoMaster)
Joined: 2007/1/22
From: East New Britain, Papua New Guinea
Posts: 6981
 Re: head A12 heart-shaped
Well the difference is the featured picture has a straight edge at the bottom of the heart. The second image shows a curve all the way round.

Poster Thread
ddgonzal
Posted: 2008/3/30 9:42  Updated: 2008/3/30 9:42
Moderator
Joined: 2001/5/3
From: 48 North
Posts: 31575
 Re: head A12 heart-shaped
Late-model A12
* No oil hole on head face
* New-style manifold bolt pattern
* B210-style water outlet