Brent B3B Posted March 6, 2014 Report Posted March 6, 2014 I have looked at past forums and at others manifolds. It appears i have a "sissor choke?" where the other trucks have none. does anyone know if this was an afterthought on my "Heinz 57" of a truck? (possibly off a car?) is there an advantage to leaving it off? second question, on the intake manifold closer to the firewall, (in the overhead photo) there is a threaded line port that i don't see anyone else having. also makes me think this was off a car? Sorry for the rust Quote
41/53dodges Posted March 6, 2014 Report Posted March 6, 2014 That is likely a car manifold then, trucks usually dont have auto choke. It appears you still have the truck carb though. And that thing on the intake manifold is a vacuum tap, usually for wiper motor or whatever else Quote
Plymouthy Adams Posted March 6, 2014 Report Posted March 6, 2014 the infamous ultra rare highly desirable, worth it weight in gold, suspected alien developed and cast "P" head.... Quote
desoto1939 Posted March 6, 2014 Report Posted March 6, 2014 you are correct that you have a sisson choke. And since the choke is in front of the carb and not behind the carb that at least puts a tentative date on the manifold. The 49 Plymouths had the sisson choke in front of the carb like the one in your picture. The other style was to have the sisson choke behind the carb. This is how mine is setup on my 39 Desoto. The two different styles are not intechngeable. On the starter motor there is a starter switch that has an electric wire that would run from the starter to the choke and then this would energise the choke and as the manifold would heat up the choke then would slow open the choke throttle flapper. So ask Tim stated I would also agree that you have a manifold off of a car. Does the block indicate that it is a truck block or a car block. Look on the boss on the left side by the generator and let us know the numbers and letters that are stamped on the flat space. LAst year I did a presentatin at the AACA annual metting onthe sisson choke for the Chrysler lecture series. I have alot of info on these chokes. Rich HArtung Desoto1939@aol.com Quote
41/53dodges Posted March 6, 2014 Report Posted March 6, 2014 the infamous ultra rare highly desirable, worth it weight in gold, suspected alien developed and cast "P" head.... I still don't get it, whats the big deal with P heads? I have two! Quote
Plymouthy Adams Posted March 6, 2014 Report Posted March 6, 2014 it's pure humor.......this P head topic has been a running joke for some time now....most have been here long enough to know that...sorry for the confusion I may have caused you..... Quote
Brent B3B Posted March 6, 2014 Author Report Posted March 6, 2014 That is likely a car manifold then, trucks usually dont have auto choke. It appears you still have the truck carb though. And that thing on the intake manifold is a vacuum tap, usually for wiper motor or whatever else thanks for the conformation, that also explains the exhaust exiting in front of the pass rear tire the infamous ultra rare highly desirable, worth it weight in gold, suspected alien developed and cast "P" head.... you called it.... it was and is a "P" head (i had the motor replaced 10yrs ago) did not realize they replaced the manifolds and exhaust with the motor Now i have to decide, to cut off the bolts and plug the vacuum hole or look for another manifold (Desoto 1939, Rich, i'll PM you) Quote
Don Coatney Posted March 6, 2014 Report Posted March 6, 2014 I am curious why you are sorry for the rust??? Quote
Brent B3B Posted March 6, 2014 Author Report Posted March 6, 2014 I am curious why you are sorry for the rust??? after looking at all the photo's of others...... mine looks kind of embarrassing.... Quote
Don Coatney Posted March 6, 2014 Report Posted March 6, 2014 Don't feel bad, nature (like dogs) always marks it's territory. Quote
John-T-53 Posted March 7, 2014 Report Posted March 7, 2014 From the photos, I don't see any linkage between the stove on the manifold and the choke butterfly on the carb. How do these work exactly? The vacuum port at the rear of the manifold is a common thing; not sure if it differed between cars and trucks. This is handy for hooking a vacuum gauge up to for tuning. Remove the brass fitting and just install a pipe plug in the hole, and you'll be good to go. Quote
desoto1939 Posted March 7, 2014 Report Posted March 7, 2014 yes you are correct there should be a rod that attaches to the lever on the choke that goes to the choke butter fly. Also noticed that there is no choke wire for the hand choke linkage on the carb either. The sisson choke is an electric choke that get set via the starter switch that sends a current to it when you engage the starter motor via a wire. the lever then closes the choke butterfly. The choke is a bi metal switch at the base of the unit and as the manifold heats up the heat then makes the choke start to retract and the choke then comes off. Very basic. If any one wants more info on the choke I have a sisson choke manual on the setup and how it operates. Rich Hartung Desoto1939@aol.com Quote
Brent B3B Posted March 7, 2014 Author Report Posted March 7, 2014 From the photos, I don't see any linkage between the stove on the manifold and the choke butterfly on the carb. How do these work exactly? The vacuum port at the rear of the manifold is a common thing; not sure if it differed between cars and trucks. This is handy for hooking a vacuum gauge up to for tuning. Remove the brass fitting and just install a pipe plug in the hole, and you'll be good to go. JT, I am in the beginning stages of starting over, I don't have anything but the oil gauge and temp hooked up. Just started it up two weeks ago for about 30sec then it dies. I thought the choke was the issue but it sounds like the vacuum is not helping. Good call on the plug, maybe the ticket to one problem. Quote
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