[DeTomaso] Dog bone air cleaner and valve cover venting

Tue Jun 11 16:12:47 EDT 2024

 One side should have a pcv valve connected to manifold vacuum and the other side should be connected to the air cleaner. The pcv is to evacuate the crankcase into the intake to burn off any oil mist or hydrocarbons and the other side is to provide a clean air supply to make up what is drawn off through the pcv.
    On Tuesday, June 11, 2024 at 09:19:31 AM PDT, Asa Jay Laughton via DeTomaso <detomaso at server.detomasolist.com> wrote:  

 The breathers have restrictions in them.  Like a flat piece of sheet metal that is partially punched and slightly bent up into the breather.  Definitely not a drain back design.  In addition, the lines go up over the covers, then back down to the intake runners for an attachment point and then up to the air cleaner.  I can send photos later tonight when I’m back in the shop.

Asa  Jay

Sent via radio waves

> On Jun 11, 2024, at 09:02, Larry Stock <larrys at panteraparts.com> wrote:
> 
> What do the baffles in the valve covers look like? Did they bother to correctly install the baffles? It doesn't sound like it, but I would expect the breather lines to be set up to drain back into the valve covers.
> Larry
> 
> 
> On 6/11/24, 8:28 AM, "DeTomaso on behalf of Asa Jay Laughton via DeTomaso" <detomaso-bounces at server.detomasolist.com <mailto:detomaso-bounces at server.detomasolist.com> on behalf of detomaso at server.detomasolist.com <mailto:detomaso at server.detomasolist.com>> wrote:
> 
> 
> Photo of the setup:
> 
> 
> 
> 
> The two huge lines coming off the back of the air cleaner go to the breather on each valve cover.
> 
> 
> The large vacuum line at the base of the carb goes directly to the brake booster.
> 
> 
> Asa Jay
> 
> 
> Sent via radio waves
> 
> 
>> On Jun 11, 2024, at 08:23, Asa Jay Laughton <asajay at asajay.com <mailto:asajay at asajay.com>> wrote:
>> 
>> Hi all,
>> I have a nice Pantera in my shop with something unusual. It has a Windsor bored and stroked to 427 and on top it has a dog bone air cleaner. My first thought is that the air cleaner is too small for the engine but I know others on this list have had great success with them so I’m trying not to worry about it.
>> 
>> My bigger concern is this. Each valve cover is plumbed directly to the dog bone through a breather cap. When I removed the air cleaner it had a lot of oil in it. When I disconnected the valve cover lines from the dog bone they had a lot of oil in them. Quite a bit actually.
>> 
>> Now I figure there are two ways that can contribute to this. First, too much blow by in the block and it’s pushing oil up the breathers to the air cleaner. Or the air cleaner is generating enough vacuum that it’s pulling a good deal of oil from the breathers.
>> 
>> In a stock setup I’m used to one valve cover being vented to an air cleaner and the other running through a PCV. Those builds without a PCV I’ve seen and used a breather to atmosphere. I’ve never seen both valve covers attached to the air cleaner like this.
>> 
>> I’m soliciting opinions on this setup, good, bad, thoughts, ideas.
>> 
>> Thank you,
>> Asa Jay
>> Pantera Research Institute - Pacific Northwest Chapter
>> 
>> Sent via radio waves
> _______________________________________________
> 
> 
> 
> 
> Detomaso Email List is not managed by POCA
> Posted emails must not exceed 1.5 Megabytes
> DeTomaso mailing list
> DeTomaso at server.detomasolist.com <mailto:DeTomaso at server.detomasolist.com>
> http://server.detomasolist.com/mailman/listinfo/detomaso <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.
> 
> 

_______________________________________________

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.  
-------------- next part --------------
   One side should have a pcv valve connected to manifold vacuum and the
   other side should be connected to the air cleaner. The pcv is to
   evacuate the crankcase into the intake to burn off any oil mist or
   hydrocarbons and the other side is to provide a clean air supply to
   make up what is drawn off through the pcv.

   On Tuesday, June 11, 2024 at 09:19:31 AM PDT, Asa Jay Laughton via
   DeTomaso <detomaso at server.detomasolist.com> wrote:
   The breathers have restrictions in them.  Like a flat piece of sheet
   metal that is partially punched and slightly bent up into the
   breather.  Definitely not a drain back design.  In addition, the lines
   go up over the covers, then back down to the intake runners for an
   attachment point and then up to the air cleaner.  I can send photos
   later tonight when Iam back in the shop.
   Asa  Jay
   Sent via radio waves
   > On Jun 11, 2024, at 09:02, Larry Stock <[1]larrys at panteraparts.com>
   wrote:
   >
   > i>>?What do the baffles in the valve covers look like? Did they
   bother to correctly install the baffles? It doesn't sound like it, but
   I would expect the breather lines to be set up to drain back into the
   valve covers.
   > Larry
   >
   >
   > i>>?On 6/11/24, 8:28 AM, "DeTomaso on behalf of Asa Jay Laughton via
   DeTomaso" <[2]detomaso-bounces at server.detomasolist.com
   <mailto:detomaso-bounces at server.detomasolist.com> on behalf of
   [3]detomaso at server.detomasolist.com
   <mailto:detomaso at server.detomasolist.com>> wrote:
   >
   >
   > Photo of the setup:
   >
   >
   >
   >
   > The two huge lines coming off the back of the air cleaner go to the
   breather on each valve cover.
   >
   >
   > The large vacuum line at the base of the carb goes directly to the
   brake booster.
   >
   >
   > Asa Jay
   >
   >
   > Sent via radio waves
   >
   >
   >> On Jun 11, 2024, at 08:23, Asa Jay Laughton <[4]asajay at asajay.com
   <mailto:asajay at asajay.com>> wrote:
   >>
   >> i>>?Hi all,
   >> I have a nice Pantera in my shop with something unusual. It has a
   Windsor bored and stroked to 427 and on top it has a dog bone air
   cleaner. My first thought is that the air cleaner is too small for the
   engine but I know others on this list have had great success with them
   so Iam trying not to worry about it.
   >>
   >> My bigger concern is this. Each valve cover is plumbed directly to
   the dog bone through a breather cap. When I removed the air cleaner it
   had a lot of oil in it. When I disconnected the valve cover lines from
   the dog bone they had a lot of oil in them. Quite a bit actually.
   >>
   >> Now I figure there are two ways that can contribute to this. First,
   too much blow by in the block and itas pushing oil up the breathers to
   the air cleaner. Or the air cleaner is generating enough vacuum that
   itas pulling a good deal of oil from the breathers.
   >>
   >> In a stock setup Iam used to one valve cover being vented to an air
   cleaner and the other running through a PCV. Those builds without a PCV
   Iave seen and used a breather to atmosphere. Iave never seen both valve
   covers attached to the air cleaner like this.
   >>
   >> Iam soliciting opinions on this setup, good, bad, thoughts, ideas.
   >>
   >> Thank you,
   >> Asa Jay
   >> Pantera Research Institute - Pacific Northwest Chapter
   >>
   >> Sent via radio waves
   > _______________________________________________
   >
   >
   >
   >
   > Detomaso Email List is not managed by POCA
   > Posted emails must not exceed 1.5 Megabytes
   > DeTomaso mailing list
   > [5]DeTomaso at server.detomasolist.com
   <mailto:DeTomaso at server.detomasolist.com>
   > [6]http://server.detomasolist.com/mailman/listinfo/detomaso
   <[7]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.
   >
   >
   _______________________________________________
   Detomaso Email List is not managed by POCA
   Posted emails must not exceed 1.5 Megabytes
   DeTomaso mailing list
   [8]DeTomaso at server.detomasolist.com
   [9]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:larrys at panteraparts.com
   2. mailto:detomaso-bounces at server.detomasolist.com
   3. mailto:detomaso at server.detomasolist.com
   4. mailto:asajay at asajay.com
   5. mailto:DeTomaso at server.detomasolist.com
   6. http://server.detomasolist.com/mailman/listinfo/detomaso
   7. http://server.detomasolist.com/mailman/listinfo/detomaso
   8. mailto:DeTomaso at server.detomasolist.com
   9. http://server.detomasolist.com/mailman/listinfo/detomaso