What is this tube you see passing through one of the exhaust runners?




Jerry

_________________
There's a difference between ignorance and stupidity.
Ignorance is not knowing any better.
Stupidity is knowing, yet doing it anyway.

AIR fitting before they moved it to the head?

I don't believe I've ever seen one of those, what year is that manifold off of?

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Official Cookie and Mater Tormentor.

That looks like an early style counterweight, so I doubt it is A.I.R. injection. Maybe a tube for an exhaust gas heated choke? That exhaust has alot of extra stiffening as well. And I have never seen that boss on the bottom for that bracket (or that bracket). Maybe a marine manifold? The space saver package where the motor was laid flat?

That is a special exhaust manifold Mopar used when you ordered an optional "carburator "de-iceing" option.

A metal tube ran between that exhaust manifold tube and to the base of a special 1bbl carb, this pulled hot air through the carb. base to keep ice from forming and sticking the throttle shaft.
DD

Cool! I wonder how it wound up in Texas. Seems like that would be mostly a cold climate option. Kind of like finding a block heater on a Mexican Dart.

It gets cold in Dallas. I sat on the runway while they de-iced the wings once. I hate flying through Dallas.

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Sweet Emotion

Actually, this is one offered to me by someone in Oklahoma. If you recall, I bought one last year for a Super Six conversion, and the darned thing was warped. Of course, I didn't discover this fact until I sandblasted and painted it. Makes a very nice boat anchor now.

I take it from your comments, this is an early version manifold (by the counterweight). I also now know it is for a 1BBL carb (by the closed choke pocket in the following pic).



Are there any major problems with using this manifold for our Super Six? I know that I'll need to cut out the back of the choke pocket, but that's not a problem. Does this style counterweight work well, or did they change the system because of design problems?

Jerry

_________________
There's a difference between ignorance and stupidity.
Ignorance is not knowing any better.
Stupidity is knowing, yet doing it anyway.

If it works freely, it works well. Truthfully, I am not aware fo atechnical reason why they changed form the triangle to the round counterweight.

Ha! I never thought I'd see one of these again. That tube came in every pre-'69 engine here in argentina. That tube if for the choke thermo control on an early carter WCD 2 barrel.

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Juan Ignacio Caino

Please use e-mail button istead of PM'ing. I do log in sometimes but I'll be answering quicker thru e-mail.

That is indeed a heat tube, and it had a few different applications.

As Dr. Dodge mentions, it was used for a throttle plate anti-ice system. This was optional equipment on Canadian-made \6 cars from 1960 through 1969, and was present on most of those cars. It was standard equipment on all 1969 US-market \6 cars.

The same manifold was used beginning in 1967 and ending after 1969 for "export" (non-North America) 225s with any of several 2bbl carburetors including the WCD and BBD, both of which were equipped with an integral round Bakelite-housed choke. After 1969, the export 2bbl setup used the 1970-1972 style exhaust manifold with the open heat stove, and instead of a stainless steel cup well for a divorced choke, a plate was installed through which a coil of heat tubing ran, serving the same function as the '69-down heat tube passing through the #2 runner.

Someone should do a article jst listing the different variations and applications of slant six exhaust manifolds. Seems like there were some radical and interesting differences.

Wait a sec....
Doc says 1BBL, Dan and others say 2BBL. Of course it is an exhaust manifold, so does it really matter? I've already got a Super Six intake, so would there be any problems using this manifold?

I simply need a good, straight, un-cracked, un-warped, exhaust manifold with a heat riser valve that works well. Is this my solution?

Jerry

_________________
There's a difference between ignorance and stupidity.
Ignorance is not knowing any better.
Stupidity is knowing, yet doing it anyway.

There were no 2bbl slant-6s from the factory in North America prior to 1976, so my comments about the use of this manifold in the US and Canada apply to 1bbl cars.

The only reason why you might run into difficulty using this exhaust manifold for a 2bbl conversion is that the 2bbl choke thermostat won't bolt on. The 2bbl choke thermostat will botl onto any '73 or later exhaust manifold, no matter whether it came off a 1bbl or 2bbl car. You can even still get the correct exhaust manifold brand new.

So, then...
Can I modify the choke pocket, so I can use my 2BBL Carter BBD, by simply cutting out the back wall? Would its choke thermostat then drop in and bolt up?

Jerry

_________________
There's a difference between ignorance and stupidity.
Ignorance is not knowing any better.
Stupidity is knowing, yet doing it anyway.

http://www.slantsix.org/articles/supersix/article.htm

You can carefully cut out the rear wall on the choke pocket and you should be fine.