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...That Smaller Square port is the Exhaust 'Cross-Over'. It Runs through the Intake Manifold and connects to the Head on the Other side. It serves to HEAT the Manifold Plenum and aid in Atomization of the Fuel, Especially Needed in Cold Climates.
That port also Supplies the 'Exhaust Gas Recirculation' System.
In Very HOT Climates, This Passage could be Blocked, as in Your case; In an attempt to keep the Manifold Cooler. I'am sure others will chime-in soon.
Yes! As Doug pointed out, the port also heats-up the 'Choke Coil' (through a separate tube) Causing the (Automatic) Choke to Open Fully.
That port also Supplies the 'Exhaust Gas Recirculation' System.
In Very HOT Climates, This Passage could be Blocked, as in Your case; In an attempt to keep the Manifold Cooler. I'am sure others will chime-in soon.
Yes! As Doug pointed out, the port also heats-up the 'Choke Coil' (through a separate tube) Causing the (Automatic) Choke to Open Fully.
I believe that is the supply port for the heat tube/chamber to warm the carburetor to keep it from freezing in cold climates.
Mr.Gasket intake gasket kits supply a plugging device to give "you" the option of blocking that heat.
In MY experience a street car does not need the heat passage blocked or more correctly I don't see the advantage of doing that on the street.
Mr.Gasket intake gasket kits supply a plugging device to give "you" the option of blocking that heat.
In MY experience a street car does not need the heat passage blocked or more correctly I don't see the advantage of doing that on the street.
quote:Originally posted by Marlin Jack:
...That Smaller Square port is the Exhaust 'Cross-Over'. It Runs through the Intake Manifold and connects to the Head on the Other side. It serves to HEAT the Manifold Plenum and aid in Atomization of the Fuel, Especially Needed in Cold Climates.
That port also Supplies the 'Exhaust Gas Recirculation' System.
In Very HOT Climates, This Passage could be Blocked, as in Your case; In an attempt to keep the Manifold Cooler. I'am sure others will chime-in soon.
Yes! As Doug pointed out, the port also heats-up the 'Choke Coil' (through a separate tube) Causing the (Automatic) Choke to Open Fully.
Thanks for the information. No need for warmer air into the carb.
quote:Originally posted by PanteraDoug:
I believe that is the supply port for the heat tube/chamber to warm the carburetor to keep it from freezing in cold climates.
Mr.Gasket intake gasket kits supply a plugging device to give "you" the option of blocking that heat.
In MY experience a street car does not need the heat passage blocked or more correctly I don't see the advantage of doing that on the street.
Thank you Pantera Doug. Always providing good information.
They are called "port stuffers". The intent is to reduce the cross sectional area of the intake ports, in effect making them smaller, theoretically increasing intake charge velocity.
It is said that they increase throttle response at low rpm and "crispen" the engine response.
If you look at virtually all of the future "aftermarket" "Boss heads", virtually all of the intake port sizes have been reduced in size for the same reason.
Variations in those sizes show varying results.
The debate often comes in which combination is "better" and then in the definition of what better is. Opinions vary.
It is said that they increase throttle response at low rpm and "crispen" the engine response.
If you look at virtually all of the future "aftermarket" "Boss heads", virtually all of the intake port sizes have been reduced in size for the same reason.
Variations in those sizes show varying results.
The debate often comes in which combination is "better" and then in the definition of what better is. Opinions vary.
quote:Originally posted by PanteraDoug:
They are called "port stuffers". The intent is to reduce the cross sectional area of the intake ports, in effect making them smaller, theoretically increasing intake charge velocity.
It is said that they increase throttle response at low rpm and "crispen" the engine response.
If you look at virtually all of the future "aftermarket" "Boss heads", virtually all of the intake port sizes have been reduced in size for the same reason.
Variations in those sizes show varying results.
The debate often comes in which combination is "better" and then in the definition of what better is. Opinions vary.
Thanks, the name of that part helps to search in order to decide.
http://pantera.infopop.cc/eve/...1074106?r=4851074106
It has been said...
...that it's harder to get a good seal on the manifold if those port plates are installed, but it's probably mostly a matter of fitting them up correctly on the initial build.
If you buy them new from the one vendor who makes them, I think those 2 sheet metal stamped plates are ~$100.
I am not sure what the aftermarket will bear (if you decide not to use them).
Rocky
...that it's harder to get a good seal on the manifold if those port plates are installed, but it's probably mostly a matter of fitting them up correctly on the initial build.
If you buy them new from the one vendor who makes them, I think those 2 sheet metal stamped plates are ~$100.
I am not sure what the aftermarket will bear (if you decide not to use them).
Rocky