[DeTomaso] How to ID Aussie heads?? // more
B Hower
b.hower3400 at yahoo.com
Thu Dec 2 11:26:36 EST 2021
USA 4V heads have a raised #4 at upper corners ... Aus 302C heads have no raised # ... USA 351C 2V heads will have a raised #2 at upper corners.. See photos for location of # area and more 335 series head spec:
On Thursday, December 2, 2021, 08:26:19 AM CST, Larry Weston <lplugw at hotmail.com> wrote:
There are also a couple of exterior differences that will allow you to
spot Aus heads bolted to an engine.
First, the outboard stand alone head bolt boss has a square head, all
USA heads, 2v or 4v versions, have a round head.
Second, all USA heads have extra material in the casting below the
outbound rocker cover rail and corresponding extra thickness leading
towards the ends of the intake manifold face to allow for drilling of
the head to create the passages and ports for the air injection to exit
through the little bumps in the exhaust ports.
Aus heads do not have the little bumps in the exhaust ports.
Sent from my iPhone
On Dec 2, 2021, at 1:38 AM, Mike Drew via DeTomaso
<[1]detomaso at server.detomasolist.com> wrote:
Larry,
It's super simple. Aussie heads have the quench combustion chambers
(same as early US 4V heads) but the smaller 2V port size (same as all
US 2V heads).
Mike
Sent from my iPad
> On Dec 1, 2021, at 18:29, Larry Finch via DeTomaso
<[2]detomaso at server.detomasolist.com> wrote:
>
> All,
>
> I currently have three pairs of iron closed-chamber cylinder heads.
Two pairs are bare cylinder heads. All three pairs are for sale.
>
> One pair is complete and freshly rebuilt with no miles, but from what
I can tell it was not a performance rebuild.
>
> I was told one of the bare pairs is the desirable Australian
closed-chamber heads.
>
> If that is true then one of the two versions in this photograph would
be Australian. I see distinct differences in the spark plug areas.
>
> Can anyone tell from this photo, or provide other clues for me to
check?
>
> Thanks in advance,
>
> Larry
>
<IMG_8378.jpg>
>
>
> Sent from me using a magic, handheld electronic gizmo.
_______________________________________________
>
>
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-------------- next part --------------
USA 4V heads have a raised #4 at upper corners ... Aus 302C heads have
no raised # ... USA 351C 2V heads will have a raised #2 at upper
corners.. See photos for location of # area and more 335 series head
spec:
On Thursday, December 2, 2021, 08:26:19 AM CST, Larry Weston
<lplugw at hotmail.com> wrote:
There are also a couple of exterior differences that will allow you
to
spot Aus heads bolted to an engine.
First, the outboard stand alone head bolt boss has a square head, all
USA heads, 2v or 4v versions, have a round head.
Second, all USA heads have extra material in the casting below the
outbound rocker cover rail and corresponding extra thickness leading
towards the ends of the intake manifold face to allow for drilling of
the head to create the passages and ports for the air injection to
exit
through the little bumps in the exhaust ports.
Aus heads do not have the little bumps in the exhaust ports.
Sent from my iPhone
On Dec 2, 2021, at 1:38 AM, Mike Drew via DeTomaso
<[1][1]detomaso at server.detomasolist.com> wrote:
Larry,
It's super simple. Aussie heads have the quench combustion chambers
(same as early US 4V heads) but the smaller 2V port size (same as all
US 2V heads).
Mike
Sent from my iPad
> On Dec 1, 2021, at 18:29, Larry Finch via DeTomaso
<[2][2]detomaso at server.detomasolist.com> wrote:
>
> All,
>
> I currently have three pairs of iron closed-chamber cylinder heads.
Two pairs are bare cylinder heads. All three pairs are for sale.
>
> One pair is complete and freshly rebuilt with no miles, but from
what
I can tell it was not a performance rebuild.
>
> I was told one of the bare pairs is the desirable Australian
closed-chamber heads.
>
> If that is true then one of the two versions in this photograph
would
be Australian. I see distinct differences in the spark plug areas.
>
> Can anyone tell from this photo, or provide other clues for me to
check?
>
> Thanks in advance,
>
> Larry
>
<IMG_8378.jpg>
>
>
> Sent from me using a magic, handheld electronic gizmo.
_______________________________________________
>
>
> Detomaso Email List is not managed by POCA
> Posted emails must not exceed 1.5 Megabytes
> DeTomaso mailing list
> [3][3]DeTomaso at server.detomasolist.com
> [4][4]http://server.detomasolist.com/mailman/listinfo/detomaso
>
> To manage your subscription (change email address, unsubscribe,
etc.)
use the links above.
>
> Members who post to this list grant license to the list to forward
any message posted here to all past, current, or future members of
the
list. They also grant the list owner permission to maintain an
archive
or approve the archiving of list messages.
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