Allstar Performance ALL81220 User Manual

Note: This distributor requires the use of an aftermarket control box and external ignition coil. Please read entire instructions

before installation.

Contents List:

(1) Fully machined 6061-T6 aluminum distributor
(1) Pre-installed rotor
(1) Pre-installed cap
(1) Plug wire retainer with two self tapping screws
(1) Gasket
(2) O-rings, for use with modi ed engine block
(4) Advance stop bushings, blue pre-installed
Red = 28 crankshaft degrees Silver = 25 crankshaft degrees

Blue = 21 crank shaft degrees Black = 18 crankshaft degrees

(3 pr) Advance springs, blue pre-installed
1 pair blue – normal rate of advance

1 pair silver – faster rate of advance
1 pair black – slower rate of advance

(1 pr) Replacement Allen head screws

Distributor Removal/Installation

1. Remove the existing distributor cap, but do not disconnect any spark plug wires.

2. Use a remote start switch or have a helper crank the engine until the rotor is positioned toward the #1 cylinder.

3. Disconnect the battery cables, remove the NEGATIVE (-) cable  rst.

4. Reinstall the distributor cap to brie y check that the rotor and the #1 plug wire are in line. Once noted, remove cap and lay to
the side. If necessary, mark spark plug wires and remove them from the distributor cap.

5. Disconnect all other wires to distributor, noting where each was attached.

6. Loosen the distributor hold down clamp and rotate the clamp to the side or remove. Lift straight up on the distributor to
remove from the engine. (The spiral cut gear will cause the rotor to rotate as the distributor is being pulled from the engine.
Be sure to compensate for this rotation when installing the new distributor.)

7. Remove old gasket and clean surface to prepare for new gasket.

8. Install O-rings if engine block has been modi ed. See  gure 1.

9. Install the gasket between distributor and intake manifold.

10. Apply a liberal amount of zinc or moly grease to the distributor gear to ensure proper gear break-in. (Grease sold separately).

11. Install distributor, making sure the rotor comes to rest aimed directly at the #1 cylinder. If the distributor does not drop into
place and fully seat against the intake manifold, remove the distributor and, using a long standard screwdriver, rotate the oil
pump shaft until it lines up with the distributor drive. Make sure distributor is fully seated after this adjustment (there should
not be any gap between distributor housing, gasket and intake manifold).

12. Turn distributor housing to position the vacuum advance canister (if applicable) to point towards the passenger side front
corner of the engine.

13. Reinstall or reposition the distributor hold down clamp, and then tighten until ready to set ignition timing.

FIG. 1

Allstar Performance 8300 Lane Drive, Watervliet MI 49098

Phone: [phone] Fax: [phone] www.allstarperformance.com

FORM 1031 Page 1 of 4 Rev.071907

14. Starting with the spark plug wire noted in step 4, position the cap on the distributor and install this spark plug wire on the
terminal that the distributor rotor is aligned to.

15. Attach the distributor cap.

16. Secure remaining spark plug wires one by one using original cap and marks from Step 4 as a reference to ensure accuracy.

17. Reconnect battery cables. Be sure to hook up the NEGATIVE (-) cable last.

18. Set ignition timing according to manufacturers or engine builder’s speci cations.

Distributor Final Connections

ALL81220 requires use of an aftermarket control box and ignition coil. See  gure 2.

Centrifugal Advance Curve

A combination of springs, weights, advance stop bushing, and an advance cam make up the working parts of the centrifugal ad­vance. By changing springs and the advance stop bushing, this distributor will operate in a wide range of applications.

FIG. 2

Allstar Performance 8300 Lane Drive, Watervliet MI 49098

Phone: [phone] Fax: [phone] www.allstarperformance.com

FORM 1031 Page 2 of 4 Rev.071907

Advance Curve

The function of advance curve is to match ignition timing to the burning rate of fuel and rpm of engine. Ignition timing may need
to be changed if the burning rate of fuel or engine rpm is altered in any way. When selecting an advance curve, use as much initial
advance as possible without encountering excessive starter load or engine kick back. Start the centrifugal advance just above idle
rpm. The starting point of centrifugal advance curve is controlled by the installed length and tension of the spring.
Advance spring sti ness controls the rate of the centrifugal advance slope. A lighter spring will provide a faster advance curve. Ad­vance bushing size controls the amount of advance. A smaller bushing will produce a slower advance. The following factors will
a ect engine timing.

Factor Delay Timing Advance Timing

Advance Springs

Air & Fuel Mixture Lean Rich

Combustion Chamber Shape Compact Open

Combustion Turbulence High Low

Cylinder Pressure High Low

Octane Of Fuel Low High

Ignition Energy High Low

Load Heavy Light
RPM Low High

Spark Plug Location Centered O set

Tem pe ra tur e Ho t Co ol

Vacuum Low High

FIG. 3

Changing Advance Springs

Remove distributor cap and rotor. Remove springs from spring posts using a pair of needle nose pliers. Install new springs with
needle nose pliers, reattach rotor, reattach cap. See Figure 3.

Changing Advance Stop Bushing

Remove distributor cap and rotor. Remove locknut and washer on bottom of advance assembly. Remove existing bushing and
replace with new bushing. Install washer, tighten locknut, reattach rotor, reattach cap. See Figure 4 on the next page.

Locking Centrifugal Advance

Remove advance springs, weights, and advance stop bushing - a small locknut with nylon insert and washer holds the advance
stop bushing in place. Next remove roll-pin from the drive gear and remove the gear from shaft. While sliding the shaft out of the
housing, approximately 2 ½ inches, rotate the shaft 180 degrees and insert the advance stop bushing pin into the hole of advance
plate. Reattach the washer and locknut to the advance stop bushing pin. Reinstall the drive gear and roll pin. See Figure 4 on the
next page.

Allstar Performance 8300 Lane Drive, Watervliet MI 49098

Phone: [phone] Fax: [phone] www.allstarperformance.com

FORM 1031 Page 3 of 4 Rev.071907

FIG. 4

Advance Stop

Bushing and Pin

Locking Centrifugal

Advance Position

Break-In Period Required

• Prior to completion of installation, the distributor gear should have received a coating of zinc or moly based grease

(grease sold separately). It is the responsibility of the installer to apply this grease.

• Do not use synthetic oil during break-in period. Once break-in period is complete, any suitable oil can be used.

• On modi ed engines with oil pressure above 70 psi (cold), the gear should be broken-in with racing grade mineral oil.

• Monitor gear wear after several hours of break-in. Check the gear for proper mesh, alignment, and wear.

Limited Warranty

Manufacturer’s obligation for warranty returns shall be limited to repairing, replacing, or crediting as its option, any parts found
to be defective. Manufacturer will not be liable for charges and/or other expenses incurred, nor shall it be liable for damages or
injury to persons or property resulting from the misuse or improper installation of any part subject to this warranty. The warranty
contained herein is expressly in lieu of any and all other warranties, including any implied warranty of merchantability or  tness
for any particular purpose.

Allstar Performance 8300 Lane Drive, Watervliet MI 49098

Phone: [phone] Fax: [phone] www.allstarperformance.com

FORM 1031 Page 4 of 4 Rev.071907