Exhaust/Radiator hose heat barrier

[Mike Kimball]

I've run up against another problem with my V8 installation. The exhaust is
only a couple of inches away from the radiator hoses for a couple of inches.
I'm going to have to build in a heat barrier of some sort. I can't put
cooling air in the area because that would raise the pressure on the exhaust
side of the radiator and inhibit airflow through the radiator. I thought
I'd solicit ideas from the builder's list about what kind of barrier.
Exhaust wrap, coatings, etc. are obvious methods. I wonder what other ideas
might pop up from you learned folks. For the sake of simplicity let's
assume I can't reroute the exhaust (i.e. do away with my headers and use
short stacks like P51 replicas) or relocate the radiator (my radiator
installation is beautiful if I do say so myself - please don't make me move
it!). It seems like exhaust wraps would be superior in heat reduction
compared to coatings, but I'm just guessing. Anybody know? My exhaust is
so simple (one 90 degree elbow off the header collector and out the lower
sides of the cowl) I'm not concerned about accelerated deterioration of the
exhaust due to using a wrap. It'll still likely give me years of flying
before needing replacement and then it'll be dirt cheap and easy to replace.



Mike Kimball (mere days away from engine start!)

044SR











-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------

[Ken]

The trouble with wraps is that you can't see underneath them and some
folks have had mild steel pipes fail in 10 or 20 hours. That can be a
bit of fire hazard!

Sometimes just a small stainless heat shield fastened with stainless
clamps right to the exhaust pipe is sufficient (as per the Bingelis
books) especially if the hoses are metal coolflex. I've got a couple of
spots where I even need to do this to protect the engine mount before
the paint is burned off.

There are also more expensive aftermarket heat shields such as spark
plug protectors but that might be a bit close for those. One layer of
any metal (preferably shiny) will dramatically drop the radiated heat. I
wouldn't trust the silicone insulators beside glowing exhaust pipes
though as they are only good for about 500degrees.

Ken

Mike Kimball wrote:

I've run up against another problem with my V8 installation. The exhaust is
only a couple of inches away from the radiator hoses for a couple of inches.
I'm going to have to build in a heat barrier of some sort. I can't put
cooling air in the area because that would raise the pressure on the exhaust
side of the radiator and inhibit airflow through the radiator. I thought
I'd solicit ideas from the builder's list about what kind of barrier.
Exhaust wrap, coatings, etc. are obvious methods. I wonder what other ideas
might pop up from you learned folks. For the sake of simplicity let's
assume I can't reroute the exhaust (i.e. do away with my headers and use
short stacks like P51 replicas) or relocate the radiator (my radiator
installation is beautiful if I do say so myself - please don't make me move
it!). It seems like exhaust wraps would be superior in heat reduction
compared to coatings, but I'm just guessing. Anybody know? My exhaust is
so simple (one 90 degree elbow off the header collector and out the lower
sides of the cowl) I'm not concerned about accelerated deterioration of the
exhaust due to using a wrap. It'll still likely give me years of flying
before needing replacement and then it'll be dirt cheap and easy to replace.



Mike Kimball (mere days away from engine start!)

044SR

-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------

[Dave Ricker]

Mike

Have a think about making up a stainless (sheet) heat shield, that'll block a
lot of the radiated heat and if you play your cards right then some of the air
coming through the rad can be aimed between it & the rad hoses. You see
stainless heat shields on cars where the underbody or other sensitive area is
near the exhaust. Even better if you can mount it on something other than the
header tube to avoid heating it by conduction.

You might also find a bit of the material racers use to insulate the floorboards
of race cars to keep the driver from toasting their feet (front engined cars
anyway...) You should be able to find that through the typical stock car racer
parts channels like Howe Racing Ent. etc. This material sounds good, claims
1000F! http://www.howeracing.com/Cockpit/Index ... hesive.htm Probably good
to wrap around the rad hose vs the header tube.

Also http://www.nasatech.com/Briefs/Feb98/KSC11938.html and
http://speedarticles.com/auto_racing_article-52.html and
http://www.raceindustry.com/?catid=196&market_niche=

That said, no chance of routing the rad hose a bit farther away or replacing
that section with a bit of metal tubing?

Cheers,

Dave

Mike Kimball wrote:

I've run up against another problem with my V8 installation. The exhaust is
only a couple of inches away from the radiator hoses for a couple of inches.
I'm going to have to build in a heat barrier of some sort. I can't put
cooling air in the area because that would raise the pressure on the exhaust
side of the radiator and inhibit airflow through the radiator. I thought
I'd solicit ideas from the builder's list about what kind of barrier.
Exhaust wrap, coatings, etc. are obvious methods. I wonder what other ideas
might pop up from you learned folks. For the sake of simplicity let's
assume I can't reroute the exhaust (i.e. do away with my headers and use
short stacks like P51 replicas) or relocate the radiator (my radiator
installation is beautiful if I do say so myself - please don't make me move
it!). It seems like exhaust wraps would be superior in heat reduction
compared to coatings, but I'm just guessing. Anybody know? My exhaust is
so simple (one 90 degree elbow off the header collector and out the lower
sides of the cowl) I'm not concerned about accelerated deterioration of the
exhaust due to using a wrap. It'll still likely give me years of flying
before needing replacement and then it'll be dirt cheap and easy to replace.



Mike Kimball (mere days away from engine start!)

044SR







-----------------------------------------------------------------
List archives located at: https://www.dcsol.com/login
username "rebel" password "builder"
Subscription services located at:
https://www.dcsol.com/public/code/html-subscribe.htm
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------

--
David A. Ricker
Fall River, Nova Scotia
Canada






-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------

[Mike Davis]

Hey Mike... if you're thinking about making a stainless shield, I've got
most of a 4'x8' sheet of 32 thou stainless in the shop. Come on by and cut
off a chunk.

Mike

----- Original Message -----
From: "Dave Ricker" <daricker@chebucto.ns.ca>
To: <rebel-builders@dcsol.com>
Sent: Monday, September 26, 2005 4:55 PM
Subject: Re: Exhaust/Radiator hose heat barrier

Mike

Have a think about making up a stainless (sheet) heat shield, that'll
block a
lot of the radiated heat and if you play your cards right then some of the
air
coming through the rad can be aimed between it & the rad hoses. You see
stainless heat shields on cars where the underbody or other sensitive area
is
near the exhaust. Even better if you can mount it on something other than
the
header tube to avoid heating it by conduction.

You might also find a bit of the material racers use to insulate the
floorboards
of race cars to keep the driver from toasting their feet (front engined
cars
anyway...) You should be able to find that through the typical stock car
racer
parts channels like Howe Racing Ent. etc. This material sounds good,
claims
1000F! http://www.howeracing.com/Cockpit/Index ... hesive.htm
Probably good
to wrap around the rad hose vs the header tube.

Also http://www.nasatech.com/Briefs/Feb98/KSC11938.html and
http://speedarticles.com/auto_racing_article-52.html and
http://www.raceindustry.com/?catid=196&market_niche=

That said, no chance of routing the rad hose a bit farther away or
replacing
that section with a bit of metal tubing?

Cheers,

Dave

Mike Kimball wrote:

I've run up against another problem with my V8 installation. The exhaust
is
only a couple of inches away from the radiator hoses for a couple of
inches.
I'm going to have to build in a heat barrier of some sort. I can't put
cooling air in the area because that would raise the pressure on the
exhaust
side of the radiator and inhibit airflow through the radiator. I thought
I'd solicit ideas from the builder's list about what kind of barrier.
Exhaust wrap, coatings, etc. are obvious methods. I wonder what other
ideas
might pop up from you learned folks. For the sake of simplicity let's
assume I can't reroute the exhaust (i.e. do away with my headers and use
short stacks like P51 replicas) or relocate the radiator (my radiator
installation is beautiful if I do say so myself - please don't make me
move
it!). It seems like exhaust wraps would be superior in heat reduction
compared to coatings, but I'm just guessing. Anybody know? My exhaust
is
so simple (one 90 degree elbow off the header collector and out the lower
sides of the cowl) I'm not concerned about accelerated deterioration of
the
exhaust due to using a wrap. It'll still likely give me years of flying
before needing replacement and then it'll be dirt cheap and easy to
replace.



Mike Kimball (mere days away from engine start!)

044SR







-----------------------------------------------------------------
List archives located at: https://www.dcsol.com/login
username "rebel" password "builder"
Subscription services located at:
https://www.dcsol.com/public/code/html-subscribe.htm
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------

--
David A. Ricker
Fall River, Nova Scotia
Canada






-----------------------------------------------------------------
List archives located at: https://www.dcsol.com/login
username "rebel" password "builder"
Subscription services located at:
https://www.dcsol.com/public/code/html-subscribe.htm
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------




__________ NOD32 1.1233 (20050926) Information __________

This message was checked by NOD32 antivirus system.
http://www.eset.com

-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------

[Mike Kimball]

Again, thanks everyone for your suggestions! And here's Mike Davis with 32
thou stainless just a few miles down the road! Things sure are falling into
place nicely lately. Oops, shouldn't have said that. Probably jinxed
myself now. Anyway, it'll be a simple matter to make stainless barriers and
fix them into place. Maybe I'll glue on some Fiberfrax (ceramic based cloth
that withstands temps to 2300 deg F) for good measure. Don't worry, you can
buy Fiberfrax high temp adhesive for the job.

Mike

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com]
Sent: Monday, September 26, 2005 7:37 PM
To: rebel-builders@dcsol.com
Subject: Re: Exhaust/Radiator hose heat barrier

Hey Mike... if you're thinking about making a stainless shield, I've got
most of a 4'x8' sheet of 32 thou stainless in the shop. Come on by and cut
off a chunk.

Mike

----- Original Message -----
From: "Dave Ricker" <daricker@chebucto.ns.ca>
To: <rebel-builders@dcsol.com>
Sent: Monday, September 26, 2005 4:55 PM
Subject: Re: Exhaust/Radiator hose heat barrier

Mike

Have a think about making up a stainless (sheet) heat shield, that'll
block a
lot of the radiated heat and if you play your cards right then some of the

air
coming through the rad can be aimed between it & the rad hoses. You see
stainless heat shields on cars where the underbody or other sensitive area

is
near the exhaust. Even better if you can mount it on something other than

the
header tube to avoid heating it by conduction.

You might also find a bit of the material racers use to insulate the
floorboards
of race cars to keep the driver from toasting their feet (front engined
cars
anyway...) You should be able to find that through the typical stock car
racer
parts channels like Howe Racing Ent. etc. This material sounds good,
claims
1000F! http://www.howeracing.com/Cockpit/Index ... hesive.htm
Probably good
to wrap around the rad hose vs the header tube.

Also http://www.nasatech.com/Briefs/Feb98/KSC11938.html and
http://speedarticles.com/auto_racing_article-52.html and
http://www.raceindustry.com/?catid=196&market_niche=

That said, no chance of routing the rad hose a bit farther away or
replacing
that section with a bit of metal tubing?

Cheers,

Dave

Mike Kimball wrote:

I've run up against another problem with my V8 installation. The exhaust

is
only a couple of inches away from the radiator hoses for a couple of
inches.
I'm going to have to build in a heat barrier of some sort. I can't put
cooling air in the area because that would raise the pressure on the
exhaust
side of the radiator and inhibit airflow through the radiator. I thought
I'd solicit ideas from the builder's list about what kind of barrier.
Exhaust wrap, coatings, etc. are obvious methods. I wonder what other
ideas
might pop up from you learned folks. For the sake of simplicity let's
assume I can't reroute the exhaust (i.e. do away with my headers and use
short stacks like P51 replicas) or relocate the radiator (my radiator
installation is beautiful if I do say so myself - please don't make me
move
it!). It seems like exhaust wraps would be superior in heat reduction
compared to coatings, but I'm just guessing. Anybody know? My exhaust
is
so simple (one 90 degree elbow off the header collector and out the lower
sides of the cowl) I'm not concerned about accelerated deterioration of
the
exhaust due to using a wrap. It'll still likely give me years of flying
before needing replacement and then it'll be dirt cheap and easy to
replace.



Mike Kimball (mere days away from engine start!)

044SR







-----------------------------------------------------------------
List archives located at: https://www.dcsol.com/login
username "rebel" password "builder"
Subscription services located at:
https://www.dcsol.com/public/code/html-subscribe.htm
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------

--
David A. Ricker
Fall River, Nova Scotia
Canada






-----------------------------------------------------------------
List archives located at: https://www.dcsol.com/login
username "rebel" password "builder"
Subscription services located at:
https://www.dcsol.com/public/code/html-subscribe.htm
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------




__________ NOD32 1.1233 (20050926) Information __________

This message was checked by NOD32 antivirus system.
http://www.eset.com

-----------------------------------------------------------------
List archives located at: https://www.dcsol.com/login
username "rebel" password "builder"
Subscription services located at:
https://www.dcsol.com/public/code/html-subscribe.htm
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------






-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------