Edelbrock Pro-Tuner Specifications download pdf (Page 3)

Catalog #3615, 3616

Rev. 6/07 - RS/mc

Brochure #63-3615Page 3 of 4

4. Lightly tighten the hold down clamp so that the distributor can still

be turned to determine final setting when checking the timing.

5. Re-attach the distributor cap. Make sure the rotor is still pointing to

#1.

6. Install your spark plug and coil wires and connect the distributor to

the wiring harness. Make sure to install the spark plug wires one at

a time and verify they are in the correct position. A wire retainer is

supplied to secure the wires to the cap. Align the retainer with the

mounting bosses, and use the supplied 1.5” self-tapping screws to

secure the retainer.

NOTE: DO NOT use a Solid-Core type spark plug wire set, such

as copper core, etc. You must use a suppression type spark

plug wire. Failure to use the correct wires will cause electrical

interference with the engine control unit.

SETTING THE CAM SYNC PICKUP

The Hall-Effect pickup is designed to provide an aftermarket ECU with a

sync signal. This signal must be advanced more than the ignition trigger

signal. The amount of advance or lead time depends upon the ECU being

used. Always check with the ECU manufacturer for the amount of lead

time required for the cam sync.

NOTE: Adjustment to the cam sync pickup is not necessary when

using the distributor with Edelbrock Pro-Tuner EFI kit 3670 or 3690.

For all other installations, refer to Figure 5 and 6 for examples of

the display of the crank and cam sync sensor outputs.

1. After the distributor is locked in place at the desired total timing,

rotate the engine until the #1 cylinder is at the required cam sync.

For example: If 10° of sync is required, and the total timing is at 36°

BTDC, rotate the engine until the #1 cylinder is at 46° BTDC.

2. With power going to the Hall-Effect pickup, adjust the pickup until

the light turns off (The voltage output will be higher. Refer to the

Hall-Effect sensor information on page 1 for reference). This will be

the advance for the ECU. It is important to rotate the pickup

clockwise until the light turns on, and then rotate the pickup

counter-clockwise until the light just turns off.

3. Lock the pickup sync in position.

Figure 5 - View of Distributor Output Signal

Figure 6 - View of Distributor Output Signal

ROTOR PHASING

Rotor phasing is defined as the alignment between the rotor tip and the

distributor cap terminal when the spark occurs

(See Figure 7)

. This

position can be very important to your engine’s performance. If the

alignment is incorrect, the spark will jump to the next closest terminal, or

another ground resulting in a misfire and loss of power. In applications

with extreme cylinder pressures, such as with nitrous or forced induction,

correct rotor phasing increases in importance. More voltage is required

to ionize the plug gap and if rotor phasing is off, the spark is more apt to

find an easier path to ground rather than the correct cap terminal. This

may result in severe engine damage.

Figure 7 - Rotor Phasing

In order to check rotor phasing, you will need to modify a distributor cap

so you can observe the rotor tip with a timing light when the engine is

running. Drill a large hole into a cap near a terminal that will allow you

an easy view of the terminal

(See Figure 8)

. To help see the rotor tip,

mark it with white correction fluid. With the modified cap installed,

connect the timing light to the corresponding plug wire. Start the engine

and run at a steady speed. Shine the timing light into the cap and make

note of the relation of the rotor tip to the terminal when spark occurs.

Since the timing is going to be controlled electronically, it is important to

position the rotor phasing at, or near the total timing (most advanced).

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Edelbrock Pro-Tuner Specifications Page 3

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