Header Wrap

M

MikeB

Active member
Dec 24, 2018
288
29
28
Lower Alabama
I was wondering why Header Wrap was not used or talked about more often with these motors. I know by using the wrap it increases out going exhaust
temps within the exhaust pipes. Is there some adverse effect it has on the system?

I had it on my headers in my 240z to reduce the radiated under hood heat that would impact my side draft carbs.
--
M Beam
75’ Avion Lots of Mods
Zuki Sidekick
 
Yes, it lowers the under hood temps, but, if your headers are not Ceramic
coated inside and out, their life will be shortened.
Jim Hupy
Salem, Oregon

On Mon, Sep 16, 2019, 4:50 PM mtb8114--- via Gmclist <

> I was wondering why Header Wrap was not used or talked about more often
> with these motors. I know by using the wrap it increases out going
> exhaust
> temps within the exhaust pipes. Is there some adverse effect it has on
> the system?
>
> I had it on my headers in my 240z to reduce the radiated under hood heat
> that would impact my side draft carbs.
> --
> M Beam
> 75’ Avion Lots of Mods
> Zuki Sidekick
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
 
For some reason lot of headers rust out quickly when wrapped so they All
refuse to warranty them.
These Ceramic coated units do a good job of cutting down on heat.
My twin turbo coach does well with that coating

On Mon, Sep 16, 2019 at 5:04 PM James Hupy via Gmclist <

> Yes, it lowers the under hood temps, but, if your headers are not Ceramic
> coated inside and out, their life will be shortened.
> Jim Hupy
> Salem, Oregon
>
> On Mon, Sep 16, 2019, 4:50 PM mtb8114--- via Gmclist <

>
> > I was wondering why Header Wrap was not used or talked about more often
> > with these motors. I know by using the wrap it increases out going
> > exhaust
> > temps within the exhaust pipes. Is there some adverse effect it has on
> > the system?
> >
> > I had it on my headers in my 240z to reduce the radiated under hood heat
> > that would impact my side draft carbs.
> > --
> > M Beam
> > 75’ Avion Lots of Mods
> > Zuki Sidekick
> >
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> >
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmc.com
1-800-752-7502
 
The problem is holding moisture against the header tubes during long
periods of non-use fosters corrosion.

Rick “whose 15-year-old nickel-plated Thorleys are still remarkably
rust-free” Denney

On Mon, Sep 16, 2019 at 7:50 PM mtb8114--- via Gmclist <

> I was wondering why Header Wrap was not used or talked about more often
> with these motors. I know by using the wrap it increases out going
> exhaust
> temps within the exhaust pipes. Is there some adverse effect it has on
> the system?
>
> I had it on my headers in my 240z to reduce the radiated under hood heat
> that would impact my side draft carbs.
> --
> M Beam
> 75’ Avion Lots of Mods
> Zuki Sidekick
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
'73 X-Glacier 230 "Jaws"
Northern Virginia
Offlist email: rick at rickdenney dot com
 
Rick
Thorley did not nickel plate them. That actually is a thin ceramic coating. I know this because I once spoke to the Thorley factory about it.

Emery Stora

>
> The problem is holding moisture against the header tubes during long
> periods of non-use fosters corrosion.
>
> Rick “whose 15-year-old nickel-plated Thorleys are still remarkably
> rust-free” Denney
>
> On Mon, Sep 16, 2019 at 7:50 PM mtb8114--- via Gmclist <

>
>> I was wondering why Header Wrap was not used or talked about more often
>> with these motors. I know by using the wrap it increases out going
>> exhaust
>> temps within the exhaust pipes. Is there some adverse effect it has on
>> the system?
>>
>> I had it on my headers in my 240z to reduce the radiated under hood heat
>> that would impact my side draft carbs.
>> --
>> M Beam
>> 75’ Avion Lots of Mods
>> Zuki Sidekick
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> --
> '73 X-Glacier 230 "Jaws"
> Northern Virginia
> Offlist email: rick at rickdenney dot com
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
 
At the time, it was a choice, and the ceramic coatings were white. This
looks like chrome, and the price was significantly less than the ones call
“ceramic coated”. We’re talking 15 years ago, when we bought them directly
from Thorley.

Rick “ecstatic at the thought that it is ceramic coating” Denney

On Mon, Sep 16, 2019 at 9:12 PM Emery Stora via Gmclist <

> Rick
> Thorley did not nickel plate them. That actually is a thin ceramic
> coating. I know this because I once spoke to the Thorley factory about it.
>
> Emery Stora
>
> > On Sep 16, 2019, at 6:10 PM, Richard Denney via Gmclist <

> >
> > The problem is holding moisture against the header tubes during long
> > periods of non-use fosters corrosion.
> >
> > Rick “whose 15-year-old nickel-plated Thorleys are still remarkably
> > rust-free” Denney
> >
> > On Mon, Sep 16, 2019 at 7:50 PM mtb8114--- via Gmclist <

> >
> >> I was wondering why Header Wrap was not used or talked about more often
> >> with these motors. I know by using the wrap it increases out going
> >> exhaust
> >> temps within the exhaust pipes. Is there some adverse effect it has on
> >> the system?
> >>
> >> I had it on my headers in my 240z to reduce the radiated under hood heat
> >> that would impact my side draft carbs.
> >> --
> >> M Beam
> >> 75’ Avion Lots of Mods
> >> Zuki Sidekick
> >>
> >> _______________________________________________
> >> GMCnet mailing list
> >> Unsubscribe or Change List Options:
> >> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> >>
> > --
> > '73 X-Glacier 230 "Jaws"
> > Northern Virginia
> > Offlist email: rick at rickdenney dot com
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
'73 X-Glacier 230 "Jaws"
Northern Virginia
Offlist email: rick at rickdenney dot com
 
Well ok. My awesome PO installed Ceramic Thorley headers so I guess I'm set. One thing he did say is that occasionally the exhaust gasket blows in
the middle and he left me a few extra gaskets. What's that all about?
--
M Beam
75’ Avion Lots of Mods
Zuki Sidekick
 
Probably the type of gasket. I have had real good luck with Remflex hanging in for years. They do make for headers or manifolds as they are
different.

> Well ok. My awesome PO installed Ceramic Thorley headers so I guess I'm set. One thing he did say is that occasionally the exhaust gasket blows
> in the middle and he left me a few extra gaskets. What's that all about?

--
C. Boyd
76 Crestmont
East Tennessee
 
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