Edelbrock 1400 - Manual (Page 4)

CHOKE ADJUSTMENT
To adjust the choke piston linkage
(See Figure 5), open the choke valve and
insert a .026" wire, with a 90-degree bend 1/8" from the end, between the
top of the slot in the choke piston cylinder and the bottom of the slot in the
piston. Hold the wire in position and close the choke valve by pressing on
piston lever “A” until resistance is felt. The dimension “C” should be .100"
between the top edge of the choke valve and the air horn. To adjust, bend
rod “B”.
©2010 Edelbrock LLC
Brochure #63-0443
Part #1400
Rev. 6/10 - AJ/mc
Page 4 of 5
To adjust the fast idle linkage (See Figure 6), place the fast idle screw A
between the two notches on the cam. Close the choke valve as far as
possible without forcing it. The dimension C should be 3/64" between the
choke valve and the air horn. To adjust, bend rod B. Fast idle may be
adjusted to manu-facturer’s specifications (usually 1500 rpm) during
normal choke cold operation. The fast idle screw A can be adjusted with
engine off and throttle held open to allow screw head access. Re-check
fast idle speed after each adjustment.
C (3/64")
B
A
Fig. 6
Slot (Piston)
.026" Wire
C (.100")
A
B
Fig. 5
Tab
Float Drop (1-1/4 ± 1/4")
Fig. 4
The length of time during which the choke will stay closed is determined
by the position of the choke cap. As the choke cap is turned clockwise,
the choke will stay closed longer. To properly set the choke, turn the
choke cap to the leanest notch on the choke housing, tighten the choke
housing retaining screws, and run the engine until normal operating
temperature is reached. With the engine running, slowly turn the choke
cap clockwise until the choke valve begins to close. Now turn the choke
housing one notch counterclockwise (LEAN) and tighten the choke
housing retaining screws. Periodic re-adjustment of the choke will be
required as the temperature changes throughout the year. After each
adjustment, verify that the choke valve opens fully after the engine is
warm.
CAUTION!!!
Do not overtighten the small Power Piston Cover screws when
servicing metering rods. They should only be tightened to 12
to 17 inch/pounds. Excessive torque will weaken or snap off
the screw heads.
If this happens, they may fall into the
carburetor causing serious engine damage. If an inch/pound
torque wrench is not available, snug the screw until it just
touches the plate, then tighten 1/16th turn more.
C.E.C. FUNCTION
Vehicles equipped with C.E.C. solenoids will require the use of
Edelbrock’s Idle Compensator Solenoid. Use part #8059. The
factory C.E.C. solenoid will not fit our throttle lever. However,
the Edelbrock Idle Compensator Solenoid will allow you to retain
the C.E.C. function and to pass visual emissions inspection in
California.
Remove front driver’s side carb stud and replace with longer stud
supplied in this kit. Place bracket over the stud and install nut and
washer on stud. Position solenoid in bracket and install large washer
(locking tabs face the solenoid) and locknut. Tighten firmly, but be
careful not to over-tighten due to the large size (1-1/4") of the wrench
used. Bend locking tabs on special washer over flats of the nut to
prevent loosening. Attach the wire from the solenoid to the existing
C.E.C. wiring connector.
If the factory connector does not fit, you will need to splice into the wire
from the connector. Use a 1/4" female receptacle and at least 18-20
gauge wire. Some receptacles will require that the locking tab on the
solenoid be flattened before the receptacle will fit.
ADJUSTMENT
With the Idle Compensator Solenoid disconnected, adjust the Idle
Speed Screw until you reach the desired idle RPM.
With the Idle Compensator Solenoid connected and the ignition in
the “On” position, adjust the solenoid until it just contacts the
throttle lever. Next, start the engine and turn the Idle Speed Screw
counter-clockwise to make sure the idle speed is maintained by the
solenoid. If necessary, adjust idle speed by turning solenoid plunger
in or out with a 1/2" wrench. Shut off the engine.
Turn the Idle Speed Screw counter-clockwise until the throttle lever
is completely closed and the Idle Speed Screw is not touching the
throttle lever. Turn the Idle Speed Scruew clockwise until it just
makes contact with the throttle lever. Continue turing 1/4 turn
more. This will make sure the throttle blades will not bind in the
bore when the solenoid is turned off.