Loading... Please wait...
Shop By Vehicle
Popular Brands
Install a Hi-Po Manual Choke
Posted by KYTE on 4th Dec 2019
Hi-Po Manual Choke Conversion Kits from Mustangs, Etc.
Text
and photography by Jim Smart
Printer-Friendly PDF
Confound it the frustrations associated with
automatic chokes. They either don’t choke enough and the darned thing stalls
when it’s cold or they choke too much and it is fouled spark plugs and sooty
exhaust. If only you had more control of your Mustang’s cold start and choke
operation. Mustangs, Etc. makes that control possible with its 289 High
Performance manual choke conversion kit for Autolite 4100 and 2100 carburetors.
This conversion kit installs in about one hour and affords you new levels of
cold start fuel metering control.
Before you install the Hi-Po manual choke
system, you must first remove the automatic choke assembly, which can be done
in minutes using a screwdriver and needle nose pliers. Installation takes just
minutes.
1 - This
is the Autolite 4100 four-barrel carburetor for the 1965-66 289-4V engine with
heat tube style automatic choke, which gets its modulation heat from the hot
exhaust manifold. A heat-sensitive bimetallic coil closes the choke plate when
the engine is cold. As the engine’s right hand exhaust manifold heats up,
manifold heat is drawn via manifold vacuum to the choke coil, which expands and
pulls the choke and fast idle cam off during warm-up.
2 - The
Autolite 2100 two-barrel carburetor is nothing more than a 2V version of the
4100 with primary bores only. The 2100 is equipped with the same automatic
choke assembly as the 4100 and can also be converted to manual choke.
3 - This
is the 289 High Performance manual choke kit from Mustangs, Etc. for Autolite
2100 and 4100 carburetors equipped with automatic choke.
4 - Here’s a typical off-the-shelf Autolite
4100 carburetor with automatic choke.
Removal is easy using a common
screwdriver and needle nose pliers.
5 - Automatic choke removal begins
with thermostatic coil removal with a common screwdriver (flat blade).
6 - A common screwdriver gets these
fine-thread machine screws securing the automatic choke.
7 - A C-clip secures the fast idle
cam and linkage.
Pop this clip and remove the automatic choke.
8 - The automatic choke assembly as it stands as a
separate bolt-on assembly.
9 - The Autolite 4100 carburetor
void of its automatic choke.
We’re going to show you how easy it is to fill
this spot with a manual hand-choke conversion from Mustangs, Etc.
10 - Automatic choke link show here
needs to be removed with a ¼-inch socket because the manual choke link has a
spring-loaded choke pull-off.
11 - Where this gets tricky is the
choke blade and shaft.
The shaft link is different from an attachment
standpoint and must be swapped, which involves grinding the end of the shaft
where it is peened, removing the automatic choke link and securing the manual choke
link and peening the shaft end or using an industrial adhesive.
12 - This is why the link has to be
changed.
The lock cam is indexed at 9 and 3 o’clock instead of 12 and 6.
The
manual choke pull-off spring allows some engine breathing with the choke full
on.
13 - Manual choke link installs like
this.
14 - Automatic choke heat vacuum
port is plugged as shown with a brass plug included in the kit.
15 - Manual choke cable adjustment/attachment
link is installed first.
16 - Fast idle cam and linkage are
installed next and secured with a C-clip.
17 - Manual choke linkage and fast
idle cam are installed.
18 - Here is the 4100 designed
specifically for the 289 High Performance V-8 with manual choke.
Note the main
body casting is different due to the absence of the small automatic choke
pull-off vacuum port.
You can buy a Hi-Po Manual Choke Conversion Kit here
Mustangs, Etc.
1 (818) 787-7634
www.mustangsetc.com
Taming Terrain
A new car market was beginning to form in the 60's which leaned toward multipurpose use. Jeep and International Harvester were the first to begin building a more maneuverable class of car but the Ford Bronco set the standard for what kind of land a vehicle could cover.Supervising engineer for the Mustang I concept car, [...]
A Galaxy of Cars
The Ford Galaxie is one of the brightest stars among the galaxy of cars.The full-sized Ford wound up being the second best-selling car platform after the Model T and the Galaxie name had a lot to do with it. Built from 1959-1974, it's instantly recognizable in its Taxi and Police Interceptor configurations but was also [...]
Soaring Over Roads
From 1960 to 1970 the Ford Falcon was an animal to be reckoned with. Competition in the compact car market has always been fierce. At the end of the 50's, more European imports were seen in the US. People became interested in smaller cars but were still adamant about buying American. At the same time, large automobiles were becoming more [...]
Work and Play
Admiration or strange fascination, the Ranchero is one of the most unique and handy vehicles Ford has rolled out. Ford's Model T and Model A trucks can often be seen sporting truck bed options. The evolution of the pickup truck has spawned from there, evolving more into what we have today with separated cabs and beds. The idea of a [...]
American Icons
Many people first imagine a pickup when thinking about what someone would drive here in the US. Ford is the reason for that. The F-Series has been the best-selling pickup line since 1977 but since 1981 they've been the best selling vehicles in America Introduced in 1948, the Ford's F Series began as the Ford Bonus-Built Trucks with the F-1 1/2 [...]
A New Kind Of Wagon
The Ford E Series is known for the classic Econoline van but the origins actually lie with the Ford Falcon.On the market in 1961, the first Econolines were planned around the frame of the Ford Falcon with the first year of production powered by the 6-cylinder Falcon Thriftmaster. A column mounted 3-speed manual transmission was [...]
Peering Into The Future
I think about Syd Mead a lot. An intense amount of science fiction and industrial design aesthetic are directly based around or at least inspired by his concepts. There's solidness to his designs. Even what stays as a painting. Every mechanical bit is rendered with proportions that let you almost feel your hands move over the contours and edges of industrial [...]
Tropical Steel
Herds of vintage automobiles roam over the island of Cuba. Over 60,000 classic American cars are on the streets of Cuba each day, being used in everything from work hauling to taxi services. Before the revolution, Cuba's large middle class was purchasing up American automobiles as they were shipped en masse to the nation just off the coast of Florida. Since [...]
Gearing Up
For America, manual shifting out of necessity has been something nearly extinct for quite some time. The days of manual shifting for style seem almost up too. Different attempts at automatic gear shifting in automobiles have been explored as early as the 1890's. Many designs emerged using various means of operation. Some early vehicles unsuccessfully employed equipment to aid in ease [...]
