Holley Sniper EFI HyperSpark Distributors are designed to plug and play with Sniper EFI systems. This design includes a
single Hall Effect sensor providing crankshaft speed to the ECU. The precision machined shutter wheel design ensures
accurate timing, even at very high engine speeds. They can also be used with other EFI systems that support a Hall Effect
crank signal input.
NOTE:
The distributor comes with a hardened steel distributor gear that should be compatible with most hydraulic roller
camshafts. It is recommended to consult your camshaft manufacturer prior to installation to confirm what
distributor gear material they require. When changing distributor gears, it is critical to measure the shaft diameter
OD and gear ID, before installing the new gear on the shaft.
Read this before proceeding
:
Before beginning the HyperSpark Distributor installation, we recommend that you locate a CLEAN Switched 12v
Ignition source. This source needs to have 12v while cranking, and with the key in the run position. Label this
source now, as you will need to use it for Step 9 of the Distributor Installation. Do NOT connect the switched 12v
wire to a source such as the ignition coil, or starter solenoid. It may be necessary to install a 4 pole relay to
provide a clean switched 12v Ignition source, Mr. Gasket 40100G will work perfectly for this application.
DISTRIBUTOR REMOVAL:
Disconnect the battery NEGATIVE (-) cable.
1.
Disconnect the power and or ground connection at the coil. Tape up any non-insulated power and ground
terminals to eliminate any chance of a short circuit.
2.
Rotate the crankshaft in the direction of engine rotation until it reads 0 degrees on the harmonic balancer. IT IS
CRITICAL TO VERIFY THE ENGINE IS ON THE COMPRESSION STROKE AT THIS POINT!
3.
Remove spark plug wires and all other wiring/vacuum hoses from distributor. Now is a good time to clean off any
debris that may fall into the oil pump galley.
4.
Remove distributor hold-down. Lift the distributor upwards and remove.
5.
As you are removing the distributor, note that the rotor rotates as you lift the distributor out of the engine. This is due
to the helical cut gear and should be taken into consideration when installing the new distributor.
Your distributor will rotate clockwise or counter-clockwise. You will need to determine the proper direction of
rotation before proceeding. See chart below.
Engine Family
Rotor Rotation
Small/Big Block Chevy Clockwise
Chrysler Small Block
Clockwise
Ford 351W
Counter-Clockwise
Ford 302
Counter-Clockwise
BB Chrysler Wedge
Counter-Clockwise
Ford FE
Counter-Clockwise
Oldsmobile
Counter-Clockwise
Pontiac
Counter-Clockwise
