[DeTomaso] Interesting Hall Pantera header oddity

[L GRAY]

The other “odd” set is probably for a set of old SVO high port heads. That’s my best educated guess after having worked for Hall for several years. 

Leslie A. Gray

> On Feb 20, 2019, at 6:02 PM, Himes, Terry (397C) via DeTomaso <detomaso at server.detomasolist.com> wrote:
> 
>   I remember my Hall Big Bores having rectangular holes. I put them on in
>   2001 and never
> 
>   had any problems!  They sound great. I had a mild engine rebuild with
>   nothing crazy.
> 
>   Engine runs perfect!
> 
> 
> 
> 
>   "A Purple Heart proves you were smart enough to hatch a plan,
> 
>    stupid enough to try it and lucky enough to survive!"
> 
> 
>   Terry W. Himes
> 
>   JPL Jet Propulsion Laboratory
> 
>   Dawn Spacecraft Team
> 
>   Juno Systems & Software Team
> 
>   TGO Sequence Lead
> 
>   Phone: (818) 393-6261
> 
>   Cell:     (818) 653-8213
> 
>   [1]thimes at jpl.nasa.gov
> 
>   🇺🇸
> 
> 
> 
>   From: DeTomaso <detomaso-bounces at server.detomasolist.com> on behalf of
>   Mike Drew via DeTomaso <detomaso at server.detomasolist.com>
>   Reply-To: Mike Drew <MikeLDrew at aol.com>
>   Date: Wednesday, February 20, 2019 at 2:30 PM
>   To: De Tomaso Forum <detomaso at server.detomasolist.com>
>   Subject: [DeTomaso] Interesting Hall Pantera header oddity
> 
> 
>   Guys,
>   You may recall that a few weeks ago I put out a call for two pairs of
>   used Hall Pantera headers on behalf of a pair of local owners. Two of
>   you stepped up first and both sets have been delivered to me. They are
>   both intended for standard 351C engines, and yet they have numerous
>   notable differences.
>   Last week I showed the header inlet ports in comparison to stock
>   Pantera manifold ports. Both are perfectly round which is odd
>   considering the cylinder head exhaust ports are rectangular:
> 
>   cid:4804ffda-ba7f-4b95-b374-5bb141d9b93b at ad.jpl
> 
> 
>   cid:a947d306-5e54-421d-800b-0f8f28912a33 at ad.jpl
> 
>   What is interesting to me is that the second set of Hall headers that
>   arrived today, which in theory are supposed to be the same, are
>   markedly different.
> 
>   cid:31b92da3-85c7-48b9-8d24-516f92c92a7d at ad.jpl
> 
>   Although dimensionally they are the same, the second set has properly
>   shaped flanges. What is most surprising is that they have 1 3/4-inch
>   primaries and a 2 3/16-inch collector while the first ones have much
>   larger 2-inch primaries and yet smaller 2 1/16-inch collectors.
>   I find this odd in the extreme. I believe the vast majority of the
>   thousands of Hall headers out there have the larger pipes and smaller
>   collectors. Larry Stock has a whole bunch of these rattling around in
>   his shop. Perhaps we can convince Larry to share what he can learn
>   about the ones in his inventory?
>   Dan Jones--considering that these are primarily being used on
>   relatively mild engines, often through stock mufflers, which ones would
>   you guess are superior?
>   Mike
>   Sent from my iPad
> 
>   _______________________________________________
>   Detomaso Email List is not managed by POCA
>   Posted emails must not exceed 1.5 Megabytes
>   DeTomaso mailing list
>   DeTomaso at server.detomasolist.com
>   [2]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.
> 
> References
> 
>   1. mailto:thimes at jpl.nasa.gov
>   2. http://server.detomasolist.com/mailman/listinfo/detomaso
> _______________________________________________
> 
> 
> Detomaso Email List is not managed by POCA
> Posted emails must not exceed 1.5 Megabytes
> DeTomaso mailing list
> DeTomaso at server.detomasolist.com
> 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.