Download the latest version of the software that is included with the current Build Package. If you have an older version this makes it easy to upgrade. This version has the RPM feature turned on and working well. The software reads the vacuum pulses in the carbs and does the math.
You will need the HEX file loader either from the build package, or purchased separately.
Includes 4 and 6 cylinder HEX files.
Note: No refunds