Dual snorkel

[Dino]

I have a '71 dual snorkel with the hose running along the back that goes to the passenger side breather.  There are also vacuum pods and a heater hose for an exhaust manifold on there.  How does all this stuff work and what was the goal?  Does it close the air filter when cold and let the heat in from the exhaust?  Howis it supposed to be hooked up?

[b5blue]

Pics? The heater deal should do just that, temp sensor someplace lets vacuum suck the door shut on the snorkel and pull air off a manifold heat stove. 

[Dino]

I don't have pics of mine yet but there's pictures of one like it on this page:  http://www.nicksgarage.com/aircleaner.htm


Scroll down about 3/4 to find this: 1971 383 and 440 4-Barrel. Has breather hose coming from left snorkel. There are two versions of the right snorkel design. Some of them have a straight line running diagonally and other have a hump in the line.


I guess it's pretty useless with headers but it's a neat piece nonetheless.  Really big as well!

[BananaDan]

The 70 dual snorkel air cleaner had the same functional design, but the breather hose came off of the back by the rear of the passenger side valve cover.  In the back center of the air cleaner bottom is a temp gauge with two nipples coming off of it.  Vacuum hose runs from each nipple up to the pods on each snorkel and a plastic T runs a vacuum line to either a carb port or a manifold vacuum port (I never hooked this part up).  There is a heat stove cover and metal flexible pipe that sit on top of the driver's exhaust manifold and the pipe runs up to the bottom of the driver's snorkel. 

The system keeps the dampers in each snorkel closed while the engine is cold and as it warms up the temp gauge/vacuum pods open the dampers.

And yes, the entire system is non-functional if you have headers.  I have the vacuum lines run on mine for appearance but I don't have the T vacuum line run nor do I have the heat stove and pipe installed as I have headers.

Here's a pic of the 70 cleaner.

http://www.1970chargerregistry.com/mboard/index.php?topic=179.msg2489#msg2489

[Dino]

The 70 dual snorkel air cleaner had the same functional design, but the breather hose came off of the back by the rear of the passenger side valve cover.  In the back center of the air cleaner bottom is a temp gauge with two nipples coming off of it.  Vacuum hose runs from each nipple up to the pods on each snorkel and a plastic T runs a vacuum line to either a carb port or a manifold vacuum port (I never hooked this part up).  There is a heat stove cover and metal flexible pipe that sit on top of the driver's exhaust manifold and the pipe runs up to the bottom of the driver's snorkel. 

The system keeps the dampers in each snorkel closed while the engine is cold and as it warms up the temp gauge/vacuum pods open the dampers.

And yes, the entire system is non-functional if you have headers.  I have the vacuum lines run on mine for appearance but I don't have the T vacuum line run nor do I have the heat stove and pipe installed as I have headers.

Here's a pic of the 70 cleaner.

http://www.1970chargerregistry.com/mboard/index.php?topic=179.msg2489#msg2489

Great explanation!   

I forgot about the temp gauge, it makes sense now.  Unfortunately the link goes to a login page and I'm not a member on that site.  I think they are pretty much the same between 70 and 71 function wise.  I thought about installing it to make cold starting easier and I thought it may even keep the fumes down under the hood.  I'm running a plain open MP cleaner now.  In time I may choose to install hp manifolds, do all of them have the provision for the heater tube?

[John_Kunkel]

Other than thread bosses, the exhaust manifold itself doesn't have a provision for the heat tube; there is a sheet metal "stove" that directs manifold heat to the AC. Clamp-on stoves (or heat muffs) are available for headers.

[Dino]

Other than thread bosses, the exhaust manifold itself doesn't have a provision for the heat tube; there is a sheet metal "stove" that directs manifold heat to the AC. Clamp-on stoves (or heat muffs) are available for headers.

Oh nice! 

Seeing I have no choke, would this particular setup be an improvement over my current open filter?  I fixed the cold starting issue as I misread timing apparently, all I had to do was retard it a few degrees and it fired right up.  Still, with no choke it's a matter of feathering and restarting once or twice because I'm trying to keep the noise down by not revving too much.

[b5blue]

Why no choke?

[Dino]

It wasn't a choice.  I had an edelbrock with electric choke on an edelbrock performer intake.  I now have a Thermoquad instead but the manifold has no provision for a choke.  I also have the crossover blocked but could drill a few holes in it to make it work.