[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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