Holley 4160, 4150 Installation Instructions Manual

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MODEL 4160 to MODEL 4150 CONVERSION KIT

34-6 & 34-6S (less metering jets)

Installation Instructions 199R8110

WARNING! These instructions must be read and fully understood before beginning installation. Failure to follow these instructions may

result in poor performance, vehicle damage, personal injury, or death. If these instructions are not fully understood, installation
should not be attempted.

INTRODUCTION:

Holley Performance Products cannot and will not be responsible for any alleged or actual engine or other damage, or other conditions
resulting from misapplication of the carburetor described herein. However, it is our intent to provide the best possible products for our
customer; products that perform properly and satisfy your expectations. Should you need information or parts assistance, please
contact our Technical Service Department at 1-270-781-9741, Monday through Friday, 7 a.m. to 5 p.m. CST; please have the part
number of the product you purchased when you call.

APPLICATIONS:

For use in converting Holley Model 4160 to a Model 4150 - A set of two main metering jets must be purchased separately to complete
the conversion.

GENERAL:

This kit is designed to fit a range of applications. Extra parts are provided to facilitate the general conversion. All parts may not be
required for each conversion.

Due to emission requirements, the number of vacuum lines and tubes is increasing. It is advisable when disconnecting tubes and
lines, to identify them in some manner so as to avoid confusion later. Trace the lines back from the carburetor to the individual
components, and identify that line. In the event that any components are unfamiliar, use a numbering system which corresponds to
each line and its original component.

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MAINTENANCE:

WARNING! Fuel system components, including fuel lines and the carburetor, should be regularly inspected to assure that no

fuel is leaking and that all hoses are sound. Today’s controlled emissions engines create high under hood

temperatures and can contribute to fast aging of the fuel line and vacuum hoses.
Any hoses which exhibit surface cracks when bent to a 180º position should be replaced.
Tightening of carburetor fuel bowl screws should provide 25-30 in./lbs. of torque in a clockwise direction. Periodically, recheck the

torque of the fuel bowl screws at regular maintenance intervals.

INSTALLATION:

Figure 1

NOTE: It will be necessary to purchase a set of two main metering jets and install them into the secondary metering block before the

carburetor is reassembled (Figure 2).

Figure 2

CONVERSION:

1. Remove the air cleaner, exercising care to detach any vacuum lines to the cleaner and marking them so they can be
reassembled to the cleaner in the same manner.

2. Remove the carburetor by following the procedure outlined below:
A. Carefully disconnect the fuel line. Do not allow any dirt to enter the fuel line or the carburetor inlet.
B. Disconnect and mark all vacuum lines to the carburetor.
C. Disconnect the PCV hose.
D. Disconnect and remove the throttle linkage and transmission kickdown linkage. Save all retaining clips.
E. Unbolt and remove the carburetor from the manifold.
F. Empty the gasoline from the carburetor into a suitable container.

3. Remove the secondary fuel bowl by removing the four (4) short retaining screws. See Fig. 3.