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The NASCAR Helmet to IMSA Adapter (SKU: SCC-NHEL2I) is a specialized communication interface cable designed to bridge the gap between two distinct motorsports wiring standards. This adapter enables drivers with NASCAR-style helmet wiring to seamlessly connect to IMSA car harness systems, providing critical communication capability across different racing disciplines. At $55.00, this adapter represents an essential piece of equipment for multi-series racers and teams operating in various motorsports environments.

 

Technical Specifications

Electrical Characteristics

  • Input Configuration: 3-conductor NASCAR standard wiring

  • Output Configuration: 4-conductor IMSA standard wiring

  • Operating Voltage: 12V DC nominal

  • Current Rating: Up to 3.0A continuous

  • Cable Length: 6 inches (152mm)

  • Connector Type: Molded automotive-grade connectors

  • Operating Temperature Range: -40°C to +85°C

  • Wire Gauge: 22 AWG stranded copper conductors

 

Physical Specifications

  • Overall Length: 6 inches (152mm)

  • Weight: 0.1 pounds (45g)

  • Connector Housing: High-impact thermoplastic

  • Cable Jacket: Polyurethane (PUR) - abrasion and chemical resistant

  • Bend Radius: 25mm minimum

 

NASCAR vs IMSA Wiring Standards

NASCAR 3-Conductor Standard

NASCAR helmet systems utilize a 3-conductor configuration where the microphone and speaker grounds are tied together. This simplified wiring scheme provides reliable communication for stock car racing environments where full-duplex communication is not typically required. The 3-conductor system includes:

  • Microphone positive (+)

  • Speaker positive (+)

  • Common ground (shared mic/speaker)

 

IMSA 4-Conductor Standard

IMSA systems employ a 4-conductor configuration that separates the microphone and speaker grounds, enabling advanced communication features including full-duplex intercom capability between driver and co-driver. The 4-conductor system includes:

  • Microphone positive (+)

  • Microphone ground (-)

  • Speaker positive (+)

  • Speaker ground (-)

 

This separation allows for superior noise isolation and enables compatibility with advanced radio systems from manufacturers like Motorola, Vertex Digital, Kenwood, and Baofeng that require the IMSA standard.

 

Primary Helmet Partnership - Roux Helmets

Speedcom maintains an exclusive partnership with Roux Helmets, offering factory-integrated communication systems. Available Roux models include:

 

These helmets feature factory-integrated communications with Speedcom's patented noise-cancelling RTM microphone and Harris Radio plugs, specifically engineered for closed-cockpit GT racing applications.

 

Professional Installation Services

While Speedcom specializes in Roux helmets, they provide professional installation services for major racing helmet brands including Bell, Stilo, Arai, Simpson, HJC, Pyrotect, and Zamp. The NASCAR to IMSA adapter is universally compatible with any helmet equipped with proper NASCAR-style 3-conductor wiring configuration.

 

Technical Compatibility Notes

  • Bell Helmets: Speedcom offers specific installation tutorials and services for Bell racing helmet communication systems

  • Universal Compatibility: The adapter functions with any helmet having appropriate NASCAR wiring, regardless of manufacturer

  • Custom Applications: Technical support available for unique helmet configurations and racing requirements

 

Applications and Use Cases

Multi-Series Racing

This adapter is essential for drivers competing in multiple racing series with different communication standards. Teams operating in both NASCAR and IMSA environments can utilize existing helmet investments across platforms while maintaining optimal communication performance.

 

Equipment Standardization

Racing teams can standardize on IMSA car harnesses while accommodating drivers with NASCAR helmet systems, reducing inventory complexity and training requirements across different racing disciplines.

 

Professional Racing Series

Compatible with official communication systems used in Creventic 24H Series, Pirelli World Challenge, FARA, Trans Am, HSR, U.S. F-4 Championship, GT Open, GT Spain, and Supercar Challenge, reflecting Speedcom's position as the official communications equipment supplier to these premier racing organizations.

 

Technical Support and Services

For installation assistance, compatibility questions, or professional installation services, contact Speedcom Communications technical support at 386-760-7110. Speedcom's experienced technicians provide comprehensive support for both Roux helmet integration and aftermarket installations on other major helmet brands. Professional installation services are available through authorized dealers and racing equipment specialists nationwide, ensuring optimal performance and safety compliance across all racing applications.

NASCAR Helmet to IMSA Adapter

SKU: SCC-NHEL2I
$55.00Price
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