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.FAQWhat 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.{"@context":"https://schema.org","@type":"FAQPage","mainEntity":[{"@type":"Question","name":"What does the MSD 6-BTM do?","acceptedAnswer":{"@type":"Answer","text":"It's a boost-referenced timing control that retards ignition timing in relation to boost pressure to prevent detonation on turbo or supercharged engines."}},{"@type":"Question","name":"How much timing retard can be dialed in?","acceptedAnswer":{"@type":"Answer","text":"0 to 3 degrees per pound of boost, up to a maximum of 15 degrees, via a dash-mounted control knob."}},{"@type":"Question","name":"What RPM modules are included?","acceptedAnswer":{"@type":"Answer","text":"3,000, 6,000, 7,000, and 8,000 RPM modules for the built-in Soft Touch Rev Control."}},{"@type":"Question","name":"What trigger inputs does it accept?","acceptedAnswer":{"@type":"Answer","text":"Breaker points, amplifier, and magnetic pickup trigger inputs."}}]}