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Paul & Brian & others:
I think that it is an electric-thermal choke set
up. The local Carquest guy said I should run the terminals to an ignition
switched power source. The 12V helps heat the thermal spring to open the
choke as the engine warms up?
Maybe that makes sense - there probably isn't
enough heat next to the carb to back the choke off as the car heats up?
(otherwise, why have the thermal spring in the intake manifold?) Inside
the disk is a piston connected to a vacuum source on the carb, that pulls on the
choke as well - that would work like the diaphragm choke pull-off.
The 1967 FSM does identify the 4327 as an HP 440
Auto Trans. carb. But, it makes no mention of any other choke set up
for Chrysler except the "well type". In the kit, it shows
applications to some GM engines as well - perhaps this carb came off a GM,
or maybe the Dodges or Plymouths had this set up, or maybe this is a late '67
year-end issue?
Regardless, now the question is where exactly do
the terminals connect to? If anyone could advise, that gets me a little
closer.
Regarding the springs, I only noticed the springs
on the throttle linkage in the FSM. It seems that the carb itself needs a
spring somewhere - maybe not but, I can't figure out how everything operates as
it sits now.
Thanks for the help,
Dan Richardson
300L w/ the heart of a '67 Imperial
----- Original Message -----
From: randalpark@xxxxxxx
Sent: Sunday, May 14, 2006 10:29 AM
Subject: Re: IML: more carb questions I am no carb expert, but the terminals that you describe sound
like connections for an electric-thermal choke pull off. I have this
on several of my other cars from GM and FMC. There is a disc in the housing
that heats the choke spring, activating choke opening during warm
up. Imperials from the '60s usually had a spring mounted in the intake manifold
that heated up and pulled a lever to open the choke. You should be able to make
this work.
Paul W. -----Original Message----- From: Daniel Richardson <TheRichardsonFamily@xxxxxxxxxxx> To: Imperial Club <mailing-list@xxxxxxxxxxxxxxxx> Sent: Sun, 14 May 2006 09:33:43 -0500 Subject: IML: more carb questions Hi everyone!
I'm rebuilding a Carter 4327 to go on the '67
Imperial 440 I have in my 300L. Any carb experts out there?
In the FSM, it identifies that carb application as
a non-CAP, High Performance. A-OK with me. The carb has a choke
set-up that is not shown in the FSM - at least I don't think so. (the FSM
refers only to a "well type" choke - that's the kind that hides in the intake
manifold, right?) This choke is a disc, just a bit smaller than a snuff
tin, mounted on the carb right where the vacuum choke pull off would be.
It has the thermo-coil in the housing and also a piston that seems to act as the
vacuum choke pull-off.
The rebuild kit shows this choke set-up on the
diagram - still A-OK. One question is - what are the two electrical
terminals on the outside of this choke housing, disc looking thing for? Do
they need to be connected to anything for the choke to operate correctly?
Or, are they test leads for the mechanic to check choke operation?
Also, I am missing the choke connector rod (I might
find one in the basement) and I am not sure where it attaches. To the
slotted bracket or to the hole on the choke rod?
Lastly, I have no springs pulling on any of the
carb linkage (except throttle rod and throttle return). In trying to
figure out the operation of the primaries & secondaries, it seems that there
should be something pulling on something else.
Wow! Way too detailed - and yet way too
vague!! Is there a Carter doctor in the house? Or anyone
that has a rebuild book that can advise of the way chokes and springs
work?
I know this is a tough one!!!
Thanks,
Dan Richardson
300L with the heart of a '67 Imperial
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