Product Overview
The Universal IMSA Style V2 Car Harness (SKU: SCC-UIHV2) represents Speedcom Communications' commitment to delivering professional-grade racing communication solutions at $165.00. This harness features advanced RF/EM shielding technology with 99.9% immune cable construction, incorporating 100% foil wrap and overall braided shield for superior protection in demanding motorsports environments. The robust design includes a durable molded Y-block with 6-foot leads for both helmet and push-to-talk connections, utilizing Speedcom's proprietary 5-pin connector system for maximum compatibility with handheld radios.
Detailed Technical Specifications
Cable Construction and Materials
- Wire Gauge: 22 AWG stranded copper conductors with tin-plated coating
- Conductor Configuration: 4-conductor IMSA standard wiring system
- Cable Type: Military-grade M22759/32 specification wire meeting SAE AS22759 standards
- Insulation Material: Cross-linked ETFE (Ethylene-Tetrafluoroethylene) with polyurethane outer jacket
- Shield Construction: Dual-layer protection featuring 100% aluminum foil wrap plus tinned copper braided shield
- Shield Coverage: >99.9% RF/EM interference immunity with braided shield coverage exceeding 85%
Physical Dimensions and Specifications
- Total System Length:
- Helmet lead: 6 feet (1.83m) from Y-block to helmet connector
- PTT lead: 6 feet (1.83m) from Y-block to push-to-talk connector
- Y-Block Dimensions: Molded thermoplastic construction, 2.5" x 1.8" x 0.8"
- Cable Diameter: 6.1mm ±0.30mm overall diameter
- Operating Temperature Range: -65°C to +150°C (-85°F to +302°F)
- Voltage Rating: 600V RMS maximum
- Bend Radius: 10x cable diameter minimum (61mm) for flexible applications
Electrical Performance Specifications
- DC Resistance: ≤16.4Ω per 1000 feet per conductor
- Characteristic Impedance: 75Ω ±5Ω
- Dielectric Strength: 2kV DC for 1 minute without breakdown
- Insulation Resistance: >5000MΩ- km
- Current Rating: 2.8A continuous at 25°C ambient temperature
RF/EM Interference Performance Ratings
Shielding Effectiveness
The Universal IMSA Style V2 Car Harness achieves industry-leading electromagnetic interference protection through its advanced dual-shield construction. The 99.9% immunity rating is achieved through a combination of 100% aluminum foil wrap and high-coverage braided copper shield. This configuration provides superior rejection of both radio frequency (RF) and electromagnetic (EM) interference across the critical VHF and UHF frequency ranges used in motorsports communication.
Universal IMSA Style V2 Car Harness
Frequency Range
Attenuation (dB/100m)
Shield Effectiveness
10-40 MHz
<3.5-6.3 dB
>99.9%
70-100 MHz
<7.7-9.2 dB
>99.8%
200-400 MHz
<13.0-18.4 dB
>99.5%
700-1000 MHz
<24.4-29.1 dB
>99.0%
This performance ensures crystal-clear communication even in high-RF environments typical of modern racing circuits with multiple radio systems, timing equipment, and electronic control units.
