The MSD 6-BTM is built for turbocharged or supercharged engines, combining full-power CD sparks with an adjustable boost/timing retard circuit to prevent detonation. A dash-mounted control knob lets you dial in timing retard from 0 to 3 degrees per pound of boost, up to a maximum of 15 degrees, countering the cylinder pressure increase that boost creates before it leads to engine-damaging detonation. It also shares the Soft Touch Rev Control of the 6AL Ignition for overrev protection.
Specifications:
- Voltage Required: 12-15V (7V start)
- Maximum RPM: 15,000
- Spark Energy: 110mJ per spark
- Primary Voltage: 470V
- Boost Retard Range: 0-3 degrees per pound of boost, up to 15 degrees maximum
- Included RPM Modules: 3,000, 6,000, 7,000, and 8,000 RPM
- Programmable For: 4, 6, or 8-cylinder engines (by cutting red/blue wire loops)
- Warranty: Manufacturer's Limited 1-Year Warranty
- Part Number: 6462
Supplied with rubber shock mounts and accepts breaker points, amplifier, and magnetic pickup trigger inputs.
FAQ
What does the MSD 6-BTM do?
It's a boost-referenced timing control that retards ignition timing in relation to boost pressure to prevent detonation on turbo or supercharged engines.
How much timing retard can be dialed in?
0 to 3 degrees per pound of boost, up to a maximum of 15 degrees, via a dash-mounted control knob.
What RPM modules are included?
3,000, 6,000, 7,000, and 8,000 RPM modules for the built-in Soft Touch Rev Control.
What trigger inputs does it accept?
Breaker points, amplifier, and magnetic pickup trigger inputs.

