Headers

B

Balaboys

Member
Jun 21, 2021
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Hello Don,I am intrigued about your headers.  I have just purchased my 76 Glenbrook with 76,000 miles on it and the exhaust manifolds need to be done.  A friend suggested Stainless steel headers and not sure if they are available.  Are yours custom made?
Eric Roell, Aurora, Ontario76 Glenbrook "Safari" 76,000 miles,Alcoa, Continental Kit, Fender Flares, Stainless Exhaust, Macerator, Ragusa Step

On Monday, August 9, 2021, 12:34:05 p.m. EDT, Don B wrote:

I’m getting ready to install my new exhaust system and am deciding where to place the thermasan injector I am fabricating.

The thermasan installation instructions say to place the “Sanijector” before the mufflers. Right before the mufflers is going to be an O2 sensor
for my EFI install. My concern is that the thermasan operation may affect the O2 sensor reading which could cause issues during closed loop fueling.

Ideally I’d have two O2 sensors, one for each bank of cylinders, but may just start with one. On the other bank I could put the sanijector to try
and isolate it from the O2 sensor.

Anyone have thoughts on this?

I bought new ceramic coated headers (dougs) and want to use the preexisting O2 sensors in the collectors. Not much room between that and the muffler,
maybe 12 inches at most.

Is there any potential issue with placing the sanijector after the mufflers? Not hot enough? Wondering what the original motivation for installation
before the mufflers was.
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Applied GMC sells them.....if memory serves me correct they are made by Doug Thorley Headers.

> Hello Don,I am intrigued about your headers.  I have just purchased my 76 Glenbrook with 76,000 miles on it and the exhaust manifolds need to be
> done.  A friend suggested Stainless steel headers and not sure if they are available.  Are yours custom made?
> Eric Roell, Aurora, Ontario76 Glenbrook "Safari" 76,000 miles,Alcoa, Continental Kit, Fender Flares, Stainless Exhaust, Macerator, Ragusa Step
>
> On Monday, August 9, 2021, 12:34:05 p.m. EDT, Don B wrote:
>
> I’m getting ready to install my new exhaust system and am deciding where to place the thermasan injector I am fabricating.
>
> The thermasan installation instructions say to place the “Sanijector” before the mufflers. Right before the mufflers is going to be an O2
> sensor
> for my EFI install. My concern is that the thermasan operation may affect the O2 sensor reading which could cause issues during closed loop
> fueling.
>
> Ideally I’d have two O2 sensors, one for each bank of cylinders, but may just start with one. On the other bank I could put the sanijector to
> try
> and isolate it from the O2 sensor.
>
> Anyone have thoughts on this?
>
> I bought new ceramic coated headers (dougs) and want to use the preexisting O2 sensors in the collectors. Not much room between that and the
> muffler,
> maybe 12 inches at most.
>
> Is there any potential issue with placing the sanijector after the mufflers? Not hot enough? Wondering what the original motivation for
> installation
> before the mufflers was.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:

--
Rich Mondor,

Brockville, ON

77 Hughes 2600
 
We supply the Low Torque Headers that is made to fit the Motorhome.
It is not SS, but coated inside and out with Ceramic coating that seem to
last lot longer than those in the past.
It works well at low RPM 2300- 3000, so it is not for racers.
There is a trick to torquing them to make gaskets last long.
We did carry the SS headers, but no longer made.

> Applied GMC sells them.....if memory serves me correct they are made by
> Doug Thorley Headers.
>

> > Hello Don,I am intrigued about your headers. I have just purchased my
> 76 Glenbrook with 76,000 miles on it and the exhaust manifolds need to be
> > done. A friend suggested Stainless steel headers and not sure if they
> are available. Are yours custom made?
> > Eric Roell, Aurora, Ontario76 Glenbrook "Safari" 76,000 miles,Alcoa,
> Continental Kit, Fender Flares, Stainless Exhaust, Macerator, Ragusa Step
> >

> >
> > I’m getting ready to install my new exhaust system and am deciding
> where to place the thermasan injector I am fabricating.
> >
> > The thermasan installation instructions say to place the “Sanijector”
> before the mufflers. Right before the mufflers is going to be an O2
> > sensor
> > for my EFI install. My concern is that the thermasan operation may
> affect the O2 sensor reading which could cause issues during closed loop
> > fueling.
> >
> > Ideally I’d have two O2 sensors, one for each bank of cylinders, but may
> just start with one. On the other bank I could put the sanijector to
> > try
> > and isolate it from the O2 sensor.
> >
> > Anyone have thoughts on this?
> >
> > I bought new ceramic coated headers (dougs) and want to use the
> preexisting O2 sensors in the collectors. Not much room between that and the
> > muffler,
> > maybe 12 inches at most.
> >
> > Is there any potential issue with placing the sanijector after the
> mufflers? Not hot enough? Wondering what the original motivation for
> > installation
> > before the mufflers was.
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> >
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
>
>
> --
> Rich Mondor,
>
> Brockville, ON
>
> 77 Hughes 2600
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
>

--
Jim Kanomata ASE
Applied/GMC, Newark,CA
jimk
http://www.gmcrvparts.com
1-800-752-7502
 
Thanks Jim.
Eric Roell, Aurora, Ontario76 Glenbrook "Safari" 76,000 miles,Alcoa, Continental Kit, Fender Flares, Stainless Exhaust, Macerator, Ragusa Step

On Monday, August 9, 2021, 06:04:21 p.m. EDT, Jim Kanomata wrote:

We supply the Low Torque Headers that is made to fit the Motorhome.
It is not SS, but coated inside and out with Ceramic coating that seem to
last lot longer than those in the past.
It works well at low RPM  2300- 3000, so it is not for racers.
There is a trick to torquing them to make gaskets last long.
We did carry the SS headers, but no longer made.

> Applied GMC sells them.....if memory serves me correct they are made by
> Doug Thorley Headers.
>

> > Hello Don,I am intrigued about your headers.  I have just purchased my
> 76 Glenbrook with 76,000 miles on it and the exhaust manifolds need to be
> > done.  A friend suggested Stainless steel headers and not sure if they
> are available.  Are yours custom made?
> > Eric Roell, Aurora, Ontario76 Glenbrook "Safari" 76,000 miles,Alcoa,
> Continental Kit, Fender Flares, Stainless Exhaust, Macerator, Ragusa Step
> >

> >
> >  I’m getting ready to install my new exhaust system and am deciding
> where to place the thermasan injector I am fabricating.
> >
> > The thermasan installation instructions say to place the “Sanijector”
> before the mufflers. Right before the mufflers is going to be an O2
> > sensor
> > for my EFI install. My concern is that the thermasan operation may
> affect the O2 sensor reading which could cause issues during closed loop
> > fueling.
> >
> > Ideally I’d have two O2 sensors, one for each bank of cylinders, but may
> just start with one. On the other bank I could put the sanijector to
> > try
> > and isolate it from the O2 sensor.
> >
> > Anyone have thoughts on this?
> >
> > I bought new ceramic coated headers (dougs) and want to use the
> preexisting O2 sensors in the collectors. Not much room between that and the
> > muffler,
> > maybe 12 inches at most.
> >
> > Is there any potential issue with placing the sanijector after the
> mufflers? Not hot enough? Wondering what the original motivation for
> > installation
> > before the mufflers was.
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> >
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
>
>
> --
> Rich Mondor,
>
> Brockville, ON
>
> 77 Hughes 2600
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
>

--
Jim Kanomata ASE
Applied/GMC, Newark,CA
jimk
http://www.gmcrvparts.com
1-800-752-7502
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