These selectors use the msd plug in rpm modules.
Msd 3 step module.
They feature three built in rev limiters one for burnout one for starting line launch and one for high end.
This helps keep tire temperatures consistent.
The different rpm modules are activated when 12 volts are applied to a corresponding wire.
Do not use solid core spark plug wires with any msd component.
These selectors use the msd plug in rpm modules.
When the line lock button is released.
By connecting one wire to the line lock circuit one module will be activated during the burnout.
This install being done is on a 1988 chevy camaro iroc z.
1 parts bag wiring terminals 1 module selector 4 mounting screws note.
As an example we ll use a drag car with a three step module selec tor plugged into the rpm socket of a 7al 2 ignition.
Page 1 msd module selectors two step pn 8739 three step pn 8737 parts included.
Msd 3 step module selectors are designed for great versatility.
Page 2 installation instructions rev limiter step module selector pn 8739 black autotronic controls corporation 1490 henry brennan dr el paso tx 79936 module 2 module 1.
They feature three built in rev limiters one for burnout one for starting line launch and one for high end.
These msd 3 step module selectors are designed for great versatility.