[DeTomaso] [EXTERNAL] Re: Exhaust popping

B Hower b.hower3400 at yahoo.com
Mon Apr 6 13:24:24 EDT 2020


There is a difference between popping out through a holy system or popping out end of tail pipe .. IMHO..

Bud #3400 ( Drive it like there is no tomorrow -- for there may not be ! ) 

    On Monday, April 6, 2020, 10:46:58 AM CDT, Joseph F Byrd, Jr <byrdjf at embarqmail.com> wrote:  
 
 Exhaust popping on lifted throttle is the norm for the TR6

-----Original Message-----
From: DeTomaso <detomaso-bounces at server.detomasolist.com> On Behalf Of steve at snclocks.com
Sent: Monday, April 6, 2020 11:04 AM
To: detomaso at server.detomasolist.com
Subject: Re: [DeTomaso] [EXTERNAL] Re: Exhaust popping

Back in high school, used to turn off the ignition when coasting in my '54 Merc, then turn it back on to get the same effect.  Am amazed I never blew the mufflers.  Oh, they were glass-packs, probably sans glass...

Stephen Nelson

-----Original Message-----
From: DeTomaso <detomaso-bounces at server.detomasolist.com> On Behalf Of Mirril McMullen
Sent: Monday, April 6, 2020 4:56 AM
To: 'Himes, Terry (US 397C)' <terry.himes at jpl.nasa.gov>; 'Mike Drew' <MikeLDrew at aol.com>; 'fred' <fred at creekspeak.com>
Cc: detomaso at server.detomasolist.com
Subject: Re: [DeTomaso] [EXTERNAL] Re: Exhaust popping

Big Bores with tiny rust holes created the backfires in my car....

Now sporting R. McCall 180s and never going back....

Trunk space is over rated ;-)

/\/\

#6859 WAYBAC

-----Original Message-----
From: DeTomaso [mailto:detomaso-bounces at server.detomasolist.com] On Behalf Of Himes, Terry (US 397C) via DeTomaso
Sent: Sunday, April 5, 2020 1:51 PM
To: Mike Drew; fred
Cc: detomaso at server.detomasolist.com
Subject: Re: [DeTomaso] [EXTERNAL] Re: Exhaust popping

HaHa...  ouch.  I've had Hall Big Bores since 2000.  ;-/



"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
Deep Space Exploration – Mission Operations
 
Dawn Spacecraft Team
Europa Lander Science Support Team
TGO Sequence Lead
MEX Sequence Lead
Odyssey Sequence Team
Spitzer Space Telescope Data Team
 
Phone: (818) 393-6261
Cell:    (818) 653-8213
thimes at jpl.nasa.gov

 

On 4/4/20, 7:23 PM, "DeTomaso on behalf of Mike Drew via DeTomaso" <detomaso-bounces at server.detomasolist.com on behalf of detomaso at server.detomasolist.com> wrote:

    Fred,
    
    You almost assuredly have an exhaust leak. Before you start monkeying with your carb, have somebody rev the car (in neutral!) while you stand alongside, or sit atop the gearbox listening for a metallic clicking sound (which would indicate a leak at one cylinder) or a coarse exhaust note (which would indicate a leak at the collector (or the presence of a Hall Pantera Big Bore exhaust system))
    
    Sorry, couldn’t resist... :)
    
    When you have an exhaust leak, under acceleration exhaust gases leak out at the location of the leak. When you lift off the throttle, a vacuum effect is created inside the exhaust system which draws in air from the outside. This air mixes with unburned fuel in the exhaust tract and ignites in the exhaust system, creating the popping noise you are hearing. 
    
    New header and/or collector gaskets will probably sort you out. 
    
    Let us know what you find out?
    
    Cheers!
    
    Mike
    
    Sent from my iPad
    
    > On Apr 4, 2020, at 19:00, fred <fred at creekspeak.com> wrote:
    > 
    >    When I back off of the accelerator,  the exhaust makes a popping noise.
    >  It isn't  a backfire in the carb. Wonder if the noise is caused by way
    >  too rich setting resulting in fuel detonating in the exhaust pipes. Car
    >  is running uneven and I can smell gas inside the car. Do I need a carb
    >  rebuild or ??? Please email me. Thanks in advance.  Fred
    > 
    >  Sent from Samsung tablet.
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-------------- next part --------------
   There is a difference between popping out through a holy system or
   popping out end of tail pipe .. IMHO..
   Bud #3400 ( Drive it like there is no tomorrow -- for there may not be
   ! )

   On Monday, April 6, 2020, 10:46:58 AM CDT, Joseph F Byrd, Jr
   <byrdjf at embarqmail.com> wrote:
   Exhaust popping on lifted throttle is the norm for the TR6
   -----Original Message-----
   From: DeTomaso <[1]detomaso-bounces at server.detomasolist.com> On Behalf
   Of [2]steve at snclocks.com
   Sent: Monday, April 6, 2020 11:04 AM
   To: [3]detomaso at server.detomasolist.com
   Subject: Re: [DeTomaso] [EXTERNAL] Re: Exhaust popping
   Back in high school, used to turn off the ignition when coasting in my
   '54 Merc, then turn it back on to get the same effect.  Am amazed I
   never blew the mufflers.  Oh, they were glass-packs, probably sans
   glass...
   Stephen Nelson
   -----Original Message-----
   From: DeTomaso <[4]detomaso-bounces at server.detomasolist.com> On Behalf
   Of Mirril McMullen
   Sent: Monday, April 6, 2020 4:56 AM
   To: 'Himes, Terry (US 397C)' <[5]terry.himes at jpl.nasa.gov>; 'Mike Drew'
   <[6]MikeLDrew at aol.com>; 'fred' <[7]fred at creekspeak.com>
   Cc: [8]detomaso at server.detomasolist.com
   Subject: Re: [DeTomaso] [EXTERNAL] Re: Exhaust popping
   Big Bores with tiny rust holes created the backfires in my car....
   Now sporting R. McCall 180s and never going back....
   Trunk space is over rated ;-)
   /\/\
   #6859 WAYBAC
   -----Original Message-----
   From: DeTomaso [mailto:[9]detomaso-bounces at server.detomasolist.com] On
   Behalf Of Himes, Terry (US 397C) via DeTomaso
   Sent: Sunday, April 5, 2020 1:51 PM
   To: Mike Drew; fred
   Cc: [10]detomaso at server.detomasolist.com
   Subject: Re: [DeTomaso] [EXTERNAL] Re: Exhaust popping
   HaHa...  ouch.  I've had Hall Big Bores since 2000.  ;-/
   "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
   Deep Space Exploration a Mission Operations
   Dawn Spacecraft Team
   Europa Lander Science Support Team
   TGO Sequence Lead
   MEX Sequence Lead
   Odyssey Sequence Team
   Spitzer Space Telescope Data Team
   Phone: (818) 393-6261
   Cell:    (818) 653-8213
   [11]thimes at jpl.nasa.gov
   i>>?On 4/4/20, 7:23 PM, "DeTomaso on behalf of Mike Drew via DeTomaso"
   <[12]detomaso-bounces at server.detomasolist.com on behalf of
   [13]detomaso at server.detomasolist.com> wrote:
       Fred,

       You almost assuredly have an exhaust leak. Before you start
   monkeying with your carb, have somebody rev the car (in neutral!) while
   you stand alongside, or sit atop the gearbox listening for a metallic
   clicking sound (which would indicate a leak at one cylinder) or a
   coarse exhaust note (which would indicate a leak at the collector (or
   the presence of a Hall Pantera Big Bore exhaust system))

       Sorry, couldnat resist... :)

       When you have an exhaust leak, under acceleration exhaust gases
   leak out at the location of the leak. When you lift off the throttle, a
   vacuum effect is created inside the exhaust system which draws in air
   from the outside. This air mixes with unburned fuel in the exhaust
   tract and ignites in the exhaust system, creating the popping noise you
   are hearing.

       New header and/or collector gaskets will probably sort you out.

       Let us know what you find out?

       Cheers!

       Mike

       Sent from my iPad

       > On Apr 4, 2020, at 19:00, fred <[14]fred at creekspeak.com> wrote:
       >
       >    When I back off of the accelerator,  the exhaust makes a
   popping noise.
       >  It isn't  a backfire in the carb. Wonder if the noise is caused
   by way
       >  too rich setting resulting in fuel detonating in the exhaust
   pipes. Car
       >  is running uneven and I can smell gas inside the car. Do I need
   a carb
       >  rebuild or ??? Please email me. Thanks in advance.  Fred
       >
       >  Sent from Samsung tablet.
       > _______________________________________________
       >
       >
       > Detomaso Email List is not managed by POCA
       > Posted emails must not exceed 1.5 Megabytes
       > DeTomaso mailing list
       > [15]DeTomaso at server.detomasolist.com
       > [16]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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References

   1. mailto:detomaso-bounces at server.detomasolist.com
   2. mailto:steve at snclocks.com
   3. mailto:detomaso at server.detomasolist.com
   4. mailto:detomaso-bounces at server.detomasolist.com
   5. mailto:terry.himes at jpl.nasa.gov
   6. mailto:MikeLDrew at aol.com
   7. mailto:fred at creekspeak.com
   8. mailto:detomaso at server.detomasolist.com
   9. mailto:detomaso-bounces at server.detomasolist.com
  10. mailto:detomaso at server.detomasolist.com
  11. mailto:thimes at jpl.nasa.gov
  12. mailto:detomaso-bounces at server.detomasolist.com
  13. mailto:detomaso at server.detomasolist.com
  14. mailto:fred at creekspeak.com
  15. mailto:DeTomaso at server.detomasolist.com
  16. http://server.detomasolist.com/mailman/listinfo/detomaso
  17. mailto:DeTomaso at server.detomasolist.com
  18. http://server.detomasolist.com/mailman/listinfo/detomaso
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