To Hot underhood, with headers

[user111]

I installed to small hood scoops thinking it would vent out the hot air, when at idle, it did not work.
any suggestions to make underhood heat less with headers.
They are wraped and still its too hot underhood
Thanks

 

[COPPERHEAD85]

Cut out the plastic inner fender maybe?
What do you mean by to much under hood heat?

 

[ForOffRoadDriving]

how hot is it getting in the engine compartment? do you have a thermometer you can place in there and give us a temp reading? what size exhaust are you running after the headers and what size are your collectors?

 

[user111]

hot enough the engine quits

With the ac on, driving on highway, it will eventually get hot and start missing and soon quit.
At idle with ac on the engine will quit because of the heat, and take forever
to cool down to be able to start again.

The Carb sits on a 2 inch riser that insulates heat from intake..
I use it to bring torque down in rpm some, as the 2.8L is high rpm torque..

The headers and Y tube in back are wrapped with Header insulation
Its the Stock size exhaust with a high flow Muffler from Napa, I was careful
to install exhaust with no burrs and with all pipe ends facing back of truck so not to resist the flow of exhaust.

I do not want to add fans, and I am not sure fender cutting would work
unless someone else has done it with success.

I am almost ready to just port the exhaust manifold and put it back on
for driveablity. And that means tunning the carb for the exhaust manifold, as now its a sweet runing machine when the secondaries open with headers..

 

[LittleHorse]

running lean or badly retarded ignition timing can cause excessive exhaust temperature.

 

[BlackBII]

What temperature is your coolant at when the engine stalls???

 

[rkneeshaw]

What temperature is your coolant at when the engine stalls???

indeed, sounds like the problem might be a failed water pump or something with the cooling system...

 

[cammeddrz]

or an ignition module that is getting hot and failing until it cools back down again

 

[strvger]

people have been running headers for quite a few years now without the overheating problems you describe. i'd be looking elsewhere as well. as said above, water pump, thermostat, ignition, etc. good luck to you.

 

[dragonranger]

look for the headers to close to the fuel line causing vapor locking of the fuel.also. check your rad and condenser for plugging.