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Power Grid-7 Ignition Control Must be used with (121-7730 or 121-77303)
InfoVehicle Info Needed
MSD IGNITIONPART NUMBER: 121-7720

Power Grid-7 Ignition Control Must be used with (121-7730 or 121-77303)

$76495
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Power Grid Ignition Control
    Power Grid-7 Ignition Control
  • Must be used with (121-7730 or 121-77303)

    Mounting Template

    Operating Specifications
  • Spark Energy: 200-220 mJ per spark
  • Primary Voltage: 545-570 volts
  • Secondary Voltage: 50,000 volts
  • Spark Series Duration: 20° crankshaft rotation
  • RPM Range: 15,000 RPM with 14.4 volts
  • Voltage Required: 12-18 volt (Negative Ground)
  • Current Draw: 1.3 amp per 1,000 RPM
  • Size: 7.5" L x 5" W x 2.25" H
  • Weight: 2.9 lbs

    Works in conjunction with 121-7730

    Note: Not legal for sale or use on pollution-controlled vehicles.




  • For use with Power Grid PN 7730 or PN 77303 only
  • High output spark for Power Grid System
  • Power Grid PN 7730/77303 mounts directly on top

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART

    The Ultimate in RPM and Timing Controls

    Take total control of your ignition system with the MSD Power Grid Ignition System, available at JEGS—a high-performance solution built for racers and serious enthusiasts who demand precision and consistency. The MSD Ignition Power Grid platform is engineered to deliver advanced spark control, real-time tuning, and integrated data logging, making it a must-have for anyone optimizing engine performance. Whether you’re building a competitive drag car or fine-tuning a street/strip machine, the MSD Power Grid Ignition System provides the accuracy and adjustability needed to unlock maximum horsepower and reliability.

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    Performance Benefits & Key Features

    The MSD Power Grid Ignition System is designed around capacitive discharge technology, delivering high-output spark energy for more efficient combustion and improved throttle response. With programmable timing curves, launch retard, boost timing control, and multiple rev limiters, this system allows users to dial in ignition settings for specific racing conditions. These performance ignition systems also feature advanced data logging capabilities, enabling racers to analyze run data and make informed tuning adjustments.

    Constructed with durable, heat-resistant components and compact housings, Power Grid units are built to withstand harsh racing environments. Key specifications often include high-voltage output, precise timing accuracy, and user-friendly software interfaces for seamless tuning. The result is more consistent passes, improved engine efficiency, and greater control over critical ignition parameters. Whether you're chasing quicker ETs or smoother power delivery, the Power Grid system delivers measurable performance gains.

    Fitment, Compatibility & Applications

    Designed for broad fitment and compatibility, the MSD Power Grid Ignition System integrates with a wide range of engine platforms, including GM LS, Ford modular, and Mopar performance engines. These ignition control units work with carbureted and fuel-injected setups and are compatible with crank triggers, distributors, and various ignition components. This flexibility makes them ideal for drag racing, street performance builds, and high-horsepower applications.

    The system is especially popular among racers who require precise ignition timing under boost or nitrous, as well as enthusiasts upgrading from traditional ignition modules. From classic muscle cars to modern performance vehicles and dedicated race builds, the Power Grid system supports diverse applications where reliability and control are critical. Its scalable design also allows users to expand functionality with additional modules and accessories.

    Backed by MSD’s reputation for engineering excellence and race-proven durability—and trusted by performance enthusiasts shopping at JEGS—the Power Grid Ignition System is a proven upgrade for serious builds. Explore the available options to find the right configuration for your setup and take your ignition performance to the next level.

Part TypeIgnition Control Module
Product LineMSD Power Grid Ignition System
BrandMSD IGNITION
Package Height2.25 in (57.15 mm)
Package Width5 in (127 mm)
Package Length10.9
Weight4.45 PG
Part CategoryPerformance Parts
Current Draw1.3 amps per 1,000 rpm
Rev LimiterYes
QuantitySold individually
Overall Length7.5 in (190.5 mm)
Spark Output (Millijoules)200-220 Millijoules
Data AcquisitionYes
CircuitryDigital
Rpm15,000
Coil IncludedNo
Minimum Operating Voltage12 V
Ignition Box OutputCapacitive discharge
Cd Voltage Output To Coil545-570 V
Part FitmentSemi Universal
Timing RetardFive-stage
Ignition Box ColorBlack
Maximum Operating Voltage18 V
Vendor Part Number7720
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
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