Holley COMMANDER 950 User Manual

Page 19

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Crank Trigger CD Ignition Systems – The Commander 950 can control the timing on any engine that uses a crank trigger
(magnetic or Hall effect) and capacitive discharge ignition box.

Non-Computer Controlled Inductive Ignition Systems – Any inductive (non-CD) ignition system (most stock ignition
systems are inductive) can be used to provide an RPM signal to the Commander 950. These systems will not allow the
Commander 950 to control ignition timing.
Points ignition and the Mallory Uni-lite systems fall into this category.

Magnetic Pickup Distributors with Mechanical Advance – Standard magnetic pickup mechanical advance distributors
such as a Holley or MSD can be used with a CD ignition system. The C950 will not be able to control timing. Connect the
yellow/black ignition wire to the tach output connection on the CD box.

GM LT1 Engines – These engines require the use of a crank trigger (Holley P/N 840-110) and CD ignition box. Follow the
wiring instructions for a crank trigger CD system.

GM LS1 Engines – These engines require the use of Holley Distributorless Ignition Systems (DIS) P/N 800-501.

NOTE: It is not advised to use a magnetic pickup distributor to directly feed the magnetic trigger input of the C950. If the
magnetic pickup distributor is connected to the C950 via the inductive pickup trigger wires, the pickup/rotor/cap
phasing must be corrected. This operation will require machining to the distributor and is therefore beyond the scope
of most users. Even with the phasing corrected, the electrical noise inside the cap may be strong enough to cause
tuning problems. Instead, it is advised that you use a crank trigger system or a computer-controlled distributor.

Reconnect the battery cable and check voltages.

6.0 SOFTWARE INSTALLATION, SOFTWARE OPERATIONAL DESCRIPTION,
AND COMPUTER OPERATION

An IBM compatible laptop computer is required for use with the COMMANDER 950. The computer must be capable of
running Windows 3.1, Windows 95, 98, or Windows NT. The laptop must also have a graphics resolution of at least 800 x
600 to view all areas of the screen.

6.1 Software Installation

6.1.1 Windows 95, 98, NT

1. Insert disk 1 of 3.

2. Select the START menu at the bottom left hand area of the computer screen.

3. On the pop up menu select RUN.

4. Type A:\SETUP.EXE in the command line box and click OK. This will begin the installation of the software. Follow the
on-screen information.

6.1.2 Windows 3.1

1. Insert Disk 1 of 3 into the floppy drive.

2. From the Window Program Manager menu select run. Type a:Setup and press enter. This will begin the installation of

the software. Follow the on-screen information.

6.2 Basic Computer Operation

Once the software is installed, a Commander 950 icon should appear on the main computer screen. When
you double-mouse click on this icon, the software should start. There is a communications cable that needs
to be hooked up to the ECU (it is connected to the harness near the ECU) for you to program and view data in
the ECU. This cable needs to be plugged into the communications (comm) port, which is usually in the back
of a laptop computer. The computer usually recognizes this comm port as comm 1. Sometimes it may be
comm 2. The proper port must be selected in the software in order for the computer to communicate with the
ECU. If comm 1 does not work, change the software to comm 2. C950 icon

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