[DeTomaso] CHI 4V heads question

Sun May 17 18:27:23 EDT 2020

Larry,

I am almost certain the CHI 4V heads are a standard exhaust port and bolt location. Could anything else have changed during your rebuild e.g. new engine mounts rubbers, thicker head gasket, painted engine bay (below motor mounts) etc.?

It may be a dumb question, but assume it was on a chassis alignment rack during collision repairs, perhaps it wasn't straight to start with?

I have CHI 4V, C302B and A3 heads here, but no stock iron heads to compare to if I were to measure exhaust header bolt location.

Julian

________________________________
From: DeTomaso <detomaso-bounces at server.detomasolist.com> on behalf of Larry Finch via DeTomaso <detomaso at server.detomasolist.com>
Sent: Sunday, May 17, 2020 2:51 PM
To: Email List Address For Posting <detomaso at server.detomasolist.com>
Subject: Re: [DeTomaso] CHI 4V heads question

Mike,

So your experience with the same heads showed no major header flange to exhaust flange gap, but you apparently chose the Remflex gaskets because they could overcome a ....small.... gap you encountered?

I have used their gaskets at both ends of my headers for some years now and this gap is beyond their sealing capabilities.

If only this issue ...could... be solved so easily ......

Thanks,

Larry

Sent from me using a magic, handheld electronic gizmo.

> On May 17, 2020, at 2:00 PM, Mike Drew <MikeLDrew at aol.com> wrote:
>
> Larry,
>
> I wound up using a pair of Remflex gaskets on each side (collector gaskets) for that reason. I think it came about when switched from iron to CHI 4V heads.
>
> That solution worked fine for me.  They have a lot of ‘crush’ capability and can be useful for alleviating such concerns. I also use their header gaskets exclusively.
>
> Mike
>
> Sent from my iPad
>
>> On May 17, 2020, at 13:54, Larry Finch via DeTomaso <detomaso at server.detomasolist.com> wrote:
>>
>> All,
>>
>> This is a question for any owner that has installed the CHI 4V aluminum cylinder heads on a Cleveland in their pantera.
>>
>> During collision repairs I had a 404 ci stroker Cleveland built for 2511 and used the CHI 4V heads.
>>
>> I did not change the GTS exhaust pipes/mufflers nor the GTS headers supplied by Dennis.
>>
>> But something has changed and the exhaust pipe will no longer correctly mate with the header flanges. With the mufflers as close to the body as possible, there is a gap at the top of the header flanges of about 3 sixteenths of an inch. Even removing the ZF side mounts and letting the transaxle rest on the rear crossmember, there is still a header flange gap.
>>
>> I’m thinking the exhaust ports on these heads may have a raised header bolt pattern and this is the source of the misalignment.
>>
>> Has anyone else found similar misalignment problems after installing these heads?
>>
>> Thanks,
>>
>> Larry
>>
>> Sent from me using a magic, handheld electronic gizmo.
>> _______________________________________________
>>
>>
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>

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-------------- next part --------------
   Larry,

   I am almost certain the CHI 4V heads are a standard exhaust port and
   bolt location. Could anything else have changed during your rebuild
   e.g. new engine mounts rubbers, thicker head gasket, painted engine bay
   (below motor mounts) etc.?

   It may be a dumb question, but assume it was on a chassis alignment
   rack during collision repairs, perhaps it wasn't straight to start
   with?

   I have CHI 4V, C302B and A3 heads here, but no stock iron heads to
   compare to if I were to measure exhaust header bolt location.

   Julian
     __________________________________________________________________

   From: DeTomaso <detomaso-bounces at server.detomasolist.com> on behalf of
   Larry Finch via DeTomaso <detomaso at server.detomasolist.com>
   Sent: Sunday, May 17, 2020 2:51 PM
   To: Email List Address For Posting <detomaso at server.detomasolist.com>
   Subject: Re: [DeTomaso] CHI 4V heads question

   Mike,
   So your experience with the same heads showed no major header flange to
   exhaust flange gap, but you apparently chose the Remflex gaskets
   because they could overcome a ....small.... gap you encountered?
   I have used their gaskets at both ends of my headers for some years now
   and this gap is beyond their sealing capabilities.
   If only this issue ...could... be solved so easily ......
   Thanks,
   Larry
   Sent from me using a magic, handheld electronic gizmo.
   > On May 17, 2020, at 2:00 PM, Mike Drew <MikeLDrew at aol.com> wrote:
   >
   > Larry,
   >
   > I wound up using a pair of Remflex gaskets on each side (collector
   gaskets) for that reason. I think it came about when switched from iron
   to CHI 4V heads.
   >
   > That solution worked fine for me.  They have a lot of `crush'
   capability and can be useful for alleviating such concerns. I also use
   their header gaskets exclusively.
   >
   > Mike
   >
   > Sent from my iPad
   >
   >> On May 17, 2020, at 13:54, Larry Finch via DeTomaso
   <detomaso at server.detomasolist.com> wrote:
   >>
   >> All,
   >>
   >> This is a question for any owner that has installed the CHI 4V
   aluminum cylinder heads on a Cleveland in their pantera.
   >>
   >> During collision repairs I had a 404 ci stroker Cleveland built for
   2511 and used the CHI 4V heads.
   >>
   >> I did not change the GTS exhaust pipes/mufflers nor the GTS headers
   supplied by Dennis.
   >>
   >> But something has changed and the exhaust pipe will no longer
   correctly mate with the header flanges. With the mufflers as close to
   the body as possible, there is a gap at the top of the header flanges
   of about 3 sixteenths of an inch. Even removing the ZF side mounts and
   letting the transaxle rest on the rear crossmember, there is still a
   header flange gap.
   >>
   >> I'm thinking the exhaust ports on these heads may have a raised
   header bolt pattern and this is the source of the misalignment.
   >>
   >> Has anyone else found similar misalignment problems after installing
   these heads?
   >>
   >> Thanks,
   >>
   >> Larry
   >>
   >> 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
   >> DeTomaso at server.detomasolist.com
   >> [1]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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