MSD 8739 RPM Controls Two Step Module Selector
by MSD
SKU ds_BCCX_8739
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Original price
$236.04
-
Original price
$236.04
Original price
$236.04
$236.04
$236.04
-
$236.04
Current price
$236.04
Availability:
4+ in stock
Description
The MSD module selectors allow you to choose two or three different rpm limits that can be activated at different times. With this ability, the possibilities are endless. As an example, we'll use a drag car with a three step module selector plugged into the rpm socket of a 7AL-2 ignition. The different rpm modules are activated when 12 volts are applied to a corresponding wire. By connecting one wire to the line-lock circuit, one module will be activated during the burnout. This helps keep tire temperatures consistent. When the line-lock button is released, the limit turns off. When you're on the starting line, you can activate the second limit through the clutch or trans switch. This provides a steady and consistent rpm for firm hole shots every time. When no modules are selected, the remaining high limit is active to protect the engine in the event of driveline failure. The two step works the same, but only with two different limits. The module selectors can also be used with an MSD timing control. By plugging the selector into a retard module socket, you can activate different retard amounts at select times. This is a great feature for engines being upgraded to a multi-stage nitrous system.
Resources
Installation InstructionsResources
Installation InstructionsSpecifications
| Description_ASC | Holley Performance Emission Code 5: This part is legal for sale or use on Emissions Controlled Vehicles; Uncontrolled (Non-Emissions Controlled) Vehicles; and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations |
| Description_DEF | Engine RPM Limiter |
| Description_DES | RPM Controls Two Step Module Selector |
| Description_EXT | RPM Controls Two Step Module Selector; Allows You To Choose Two Different RPM Limits That Can Be Activated At Different Times; |
| Description_FAB | Allows a launch rev limiter and a high speed rev limiter |
| Description_INV | Module Selector; Two Step |
| Description_LAB | Proposition 65 |
| Description_MKT | The MSD module selectors allow you to choose two or three different rpm limits that can be activated at different times. With this ability, the possibilities are endless. As an example, we'll use a drag car with a three step module selector plugged into the rpm socket of a 7AL-2 ignition. The different rpm modules are activated when 12 volts are applied to a corresponding wire. By connecting one wire to the line-lock circuit, one module will be activated during the burnout. This helps keep tire temperatures consistent. When the line-lock button is released, the limit turns off. When you're on the starting line, you can activate the second limit through the clutch or trans switch. This provides a steady and consistent rpm for firm hole shots every time. When no modules are selected, the remaining high limit is active to protect the engine in the event of driveline failure. The two step works the same, but only with two different limits. The module selectors can also be used with an MSD timing control. By plugging the selector into a retard module socket, you can activate different retard amounts at select times. This is a great feature for engines being upgraded to a multi-stage nitrous system. |
| Description_SHO | RPM Module Selector |
| height | 2.3 |
| length | 8.0 |
| LTL | N |
| WARNING CA Proposition 65 | Yes |
| WARNING CA Proposition 65 Message | WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov |
| weight | 0.425 |
| width | 7.05 |
