GMC; single muffler

[claude brousson]

One further thought on this-I certainly agree it is desirable to get rid
of heat if one can. So far I have approached the problem a little
differently than moving the muffler to the back.

I built some sheet tin deflecters behind the headers to drive the heat
down toward the road. I have installed my old ceiling fan under the
passengers side to drive heat out the side vent which I and many others
have installed. This is on a switch which I turn on if I am stopped in
hot and slow heavy traffic.This pulls the heat away from the carburator
area. I have the metal gas line to the carb running through an insulated
fireproof hose to help keep the gas cooler. I have a metal spoiler
behind the mufflers deflecting the wind and heat down toward the road
and away from the gas tanks. And I have the bottom of the gas tanks
painted white to reflect heat from the asphalt back down rather than
into the tanks.

I do not use an electric fuel pump, and so far have never had vapour
lock. However, to be fair,I don't travel in the south, and in the desert
when it is super hot. If I did, maybe I would have a heat problem as
many others have.
I would like the headers to not radiate so much heat, but still
exploring how best to do that without costing an arm and a leg so to
speak, with something which may not be permanent.

Each to their own way, as always,
Claude

 

[gene]

ok, ok, ok,

did you measure the temp change before and after you turn on the fan ??? ;>)

Wow I am surprised there is enough room for that fan. Did you keep the
whole assembly or just the fan?. I was thinking of using an electric fan up
front to do this but never wanted to put more in front of the radiator.
This sounds like a better answer. Would be nice to have it on a thermostat
so it would turn self on and off .. Did you do any ducting or just point
it down ??

gene

>One further thought on this-I certainly agree it is desirable to get rid
>of heat if one can. So far I have approached the problem a little
>differently than moving the muffler to the back.
>
>I built some sheet tin deflecters behind the headers to drive the heat
>down toward the road. I have installed my old ceiling fan under the
>passengers side to drive heat out the side vent which I and many others
>have installed. This is on a switch which I turn on if I am stopped in
>hot and slow heavy traffic.This pulls the heat away from the carburator
>area. I have the metal gas line to the carb running through an insulated
>fireproof hose to help keep the gas cooler. I have a metal spoiler
>behind the mufflers deflecting the wind and heat down toward the road
>and away from the gas tanks. And I have the bottom of the gas tanks
>painted white to reflect heat from the asphalt back down rather than
>into the tanks.
>
> I do not use an electric fuel pump, and so far have never had vapour
>lock. However, to be fair,I don't travel in the south, and in the desert
>when it is super hot. If I did, maybe I would have a heat problem as
>many others have.
>I would like the headers to not radiate so much heat, but still
>exploring how best to do that without costing an arm and a leg so to
>speak, with something which may not be permanent.
>
>Each to their own way, as always,
>Claude
>
Genef -- 77PB/ore/ca
GMC MOTORHOME INFORMATION
mr.erf
http://www.california.com/~eagle/