The MSD 8740 Coil Current Booster is built for Ford Modular engines with coil-on-plug ignitions that need extra spark energy to support high horsepower. It increases peak current at the ignition coil and spark energy at the plug gap, making it a good match for engines with increased cylinder pressure from higher compression, a shot of nitrous, or boosted applications. A built-in Two-Step rev limiter delivers consistent launches and quick 60-foot times, with RPM adjustments made via two rotary switches from 1,000-10,900 RPM in 100 and 1,000 RPM increments.
Specifications:
- Application: Ford Modular Coil-On-Plug engines
- Color: Red
- Voltage Required: 6-18V
- Maximum RPM: 10,900
- Feature: Built-in Two-Step Rev Limiter (1,000-10,900 RPM, 100/1,000 RPM increments)
- Spark Output: 20% over stock
- Installation: Factory-style wiring connectors, plug directly into stock coils and harness
- Warranty: Manufacturer's Limited 1 Year Warranty
- Part Number: 8740
Compliance: This part is legal for sale and use on Racing Use Only Vehicles — competition vehicles that are not registered and never operated on the street. It is against the law to install this part on an Emissions Controlled Vehicle (1966-and-newer California-certified or 1968-and-newer federally certified vehicles).
FAQ
What does the MSD 8740 Coil Current Booster do?
It increases peak current at the ignition coil and spark energy at the plug gap on Ford Modular coil-on-plug engines, adding roughly 20% over stock spark output.
What is the Two-Step rev limiter range?
It's adjustable from 1,000 to 10,900 RPM via two rotary switches, in 100 and 1,000 RPM increments.
Does it plug into factory wiring?
Yes, factory-style connectors plug directly into the stock coils and wiring harness.
What applications benefit most from this booster?
Engines with increased cylinder pressure from higher compression, nitrous, or boosted applications benefit most from the added spark energy.
