Anyone running an MSD ignition box or rpm module needs one of these rpm checkers on hand. Each tester operates on a single 9V battery and is simple to use — just plug it into the MSD ignition box or rpm module and hold down the button. MSD rpm module testers are essential for any racing class with rpm limitations.
Specifications:
- Category: Vehicles, Equipment, Tools, and Supplies
- Part Type: Diagnostic Scan Tool
- Sub Category: Shop Equipment, Tools and Accessories
- Power Source: Single 9V battery
- Design: User-friendly plug-and-play
- Part Number: 89952
FAQ
What does the MSD 89952 tester check?
It verifies the operation of MSD ignition boxes and rpm modules, confirming the rpm limit is working correctly.
How is the MSD 89952 powered?
It runs on a single 9V battery.
How do I use the RPM Module/Chip Tester?
Plug it into your MSD ignition box or rpm module and hold down the button — that's it.
Who needs this tester?
It's essential for anyone racing in a class with rpm limitations, to confirm the rpm module or chip is functioning correctly.

