Triggering an MSD 6 or 7-Series ignition off its white wire or points terminal requires a Tach Adapter to correct the operation of most voltage-triggered tachometers or fuel injection systems that don't read directly off the ignition's tach output terminal. The 8910EIS is built for current-limiting ignition systems that don't use a ballast resistor.
Specifications:
- Brand: MSD
- Category: Body
- Product Type: Tach Adapter
- Sub Category: Hardware, Fasteners and Fittings
- Warning: California Proposition 65
- Warranty: Manufacturer's Limited 1 Year Warranty
- Part Number: 8910EIS
FAQ
How is the 8910EIS different from the standard 8910 Tach Adapter?
The 8910EIS is designed for current-limiting ignition systems (non-ballast resistor systems), while the standard 8910 is for ballast-resistor ignitions.
When do I need the MSD 8910EIS?
When triggering an MSD 6 or 7-Series ignition off its white wire or points terminal on a current-limiting ignition system.
What does the 8910EIS correct?
The operation of voltage-triggered tachometers or fuel injection systems that don't read directly off the MSD's tach output terminal.

