Summit Racing SUM-830450-1 User manual

1 - SUM-830450-1 (rev. 08/2018)Summit Racing Equipment www.summitracing.com
Installation Instructions for SUM-830450-1
Summit Racing RPM Switch with Digital Readout
* Always disconnect the battery before attempting any electrical work on your vehicle.*
Caution: Do NOT allow any of the switch wires other than the RED (power
source) wire to touch any 12V source, as this will cause the hardware to
malfunction, destroying the functionality of the switch.
WIRING INSTRUCTIONS
Note: Automotive circuit connectors are the preferred method of connecting wires. However,
you may solder if you prefer.
Note: If doing an LS engine swap, pick up the tach signal wire from the ECM/ECU and then set the
tach switch to 4-cylinders.
MOUNTING INSTRUCTIONS
Power - Red Connect to a switched +12V source.
Ground - Black Connect to an engine block ground.
Tach Input – Grey Connect to the negative terminal of your coil, or, if using a high energy CD
ignition, connect to the tach output of the ignition system instead.
Ground Output - Blue Connect to the negative/ground side of the device that you want to activate
at the desired RPM.
Note: If the device to which the blue wire is attached draws more than 3 amps, a relay must
be used to drive that device or damage will occur to the unit.
If your vehicle has a separate ignition coil, connect the gray wire to the negative (-) side of the
coil – the wire that goes to the points or electronic ignition module.
If your vehicle has a GM HEI ignition, connect to the terminal marked ‘TACH’, or, on some
systems, a single white wire with a spade terminal.
If your vehicle has an after-market ignition – some systems will connect to the TACH output
terminal.
If your vehicle has a computer controlled ignition system, consult the service manual for the
wire color and location.

2 - SUM-830450-1 (rev. 08/2018)Summit Racing Equipment www.summitracing.com
OPERATION
This device has two settings for Normally Open (the Blue wire will provide ground AFTER the switch
reaches the set RPM), and for Normally Closed (the Blue wire will provide ground UNTIL the switch
reaches the set RPM).
This unit comes with a factory setting for a 8-cylinder engine and activation at 5000 RPM Normally
Open. The display will stay in Settings Mode until it receives a signal from the ignition system. To
program the unit after starting the engine, shut the engine off and turn on only the ignition.
When in Settings Mode, use push buttons on the device face to change the RPM switch setting in
increments of 100 RPM at a time, up to 9900 RPM. The left button increases, while the right button
decreases. Once you are at the desired setting, the LED display will stay on the RPM setting for a
few seconds, then switch to NO and NC settings. Use the left button to choose. Finally, wait a few
seconds and the device will move on to the final selection, number of cylinders. The device is
programmed for use with 4, 6, and 8-cylinder engines. Use the left button to make your selection.
When you are satisfied with your settings, start the engine and your device will begin to operate
automatically.
A blue LED will indicate when the switch is activated.
Questions? Call our Tech Line 1-800-230-3030
9 am to 9 pm EST Monday through Friday, forhelp with parts installation or
application. Please have allrelevant vehicle information ready when you call.