Owners manual

11
Figure 13
8. Tighten the two Phillips screws securely and reinstall the air cleaner, as shown in Figure 13.
9. Test drive the vehicle.
JETTING (MAIN JETS):
Due to varied applications that a universal performance carburetor will work with, a few tips on jetting are provided to help you
understand their purpose.
1. Out of the box jetting is extremely close for most applications.
2. Carburetors are calibrated at sea level. Decrease the jet size primary and secondary, one number for every 2000 ft.
increase in altitude.
3. Holley® jets are broached, flowed, and stamped according to flow rate. NEVER drill jets, as this seriously alters flow
characteristics. Stamped numbers are reference numbers and DO NOT indicate drill size.
4. In most cases it will be unnecessary to increase jet size more than four numbers greater than out of the box jetting.
Exceptions could arise when the carburetor is mounted on a very large volume, plenum-ram manifold.
5. Spark plugs provide the best indication of proper jetting. Consult an ignition manual for proper reading of spark plugs.
CARBURETOR SPECIFICATIONS:
Use this as a place to record the carburetor specs out of the box so you will have a record of the original calibration
CARB #
PRIMARY
METERING
JET
SECONDARY
METERING
JET
PUMP
DISCHARGE
NOZZLE
PRIMARY
POWER
VALVE
SECONDARY
POWER
VALVE
SECONDARY
DIAPHRAGM
SPRING