PN2905 Ver la hoja de datos (PDF) - Mallory performance club

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PN2905

Atomic EFI Throttle Body

Mallory performance club 

INSTALLATION INSTRUCTIONS

3

WIRING

There are several wires and connectors on the throttle body. Not all of these wires will be connected

on every application. Following is a chart of each wire.

REQ. / OPT.

REQ

Wire Color

Yellow

Black

Description

This connects to the Engine Coolant Temperature Sensor (ECT).

REQ

Optional

Optional

Optional

REQ

White

This is the tach input wire for the EFI. It connects to the tach

output of an MSD Ignition Control or Ready-to-Run distributor

to supply an RPM signal. Note: This wire is not used when the

magnetic pickup wire is being used for ignition timing.

Yellow

This is a tach output wire. Connect this wire to the White points

input wire on an MSD ignition unit only when using the Atomic

to control timing. If the Atomic is not controlling timing this wire

can be used as a 12 volt square wave trigger to a tachometer.

Orange

This is an AC kick-up wire. When 12 volts are supplied to this wire

it will provide a small rpm "kick-up" in the idle to compensate for

the added engine load from the air conditioner compressor.

Violet (+)

Green (-)

This is the input for a magnetic pickup, such as from an MSD

distributor. This connector is only used when the Atomic is

controlling ignition timing (Mag Pickup).

CAN Connector The 6-pin connector must connect to the Power Module. Do NOT

cut this harness. MSD offers extensions in 2, 4 and 6-foot lengths

if needed.

THROTTLE BLADE ADJUSTMENTS

Note that there are three adjustment screws on

the linkage (Fig 4). One screw adjusts the opening

of the front throttle blades. The rear blades also

have an adjustment screw. These may require

adjustment, depending on your engine. There is

one more adjustment that controls the front and

rear throttle blades opening at the same time. This is

set at the factory, but each application may require

slight adjustments to receive the best drivability.

For initial start-up, MSD recommends the following:

• On a street/stock type cam, turn the throttle

screws ½ turn from the point where the blades

first start to move.

• For a mild cam, turn the screws one additional

turn from the point where the blades first move.

• For Larger cams, turn the screw 1½ turns from

the point where the blades first move.

FRONT THROTTLE

ADJUSTMENT

REAR

SYNC

(SET AT FACTORY)

Figure 4 Throttle Body Adjustment Screws.

M S D  •  WWW.MSDPERFORMANCE.COM • (915) 855-7123 • FAX (915) 857-3344

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