70A Dual Fan Relay Kit – Carbureted with Basic Trigger
$188.95
This kit is for vehicles with carburetors with or without air conditioning. This completely waterproof kit installs easily and plugs directly into your electric fans via standard fan plugs – of which most of the major fan manufacturers use. Harnesses dressed in Split Braided Tubing for that show car look!
Triggering is fully automatic (see specifications below for specifics). Powers fans requiring up to 35A continuously with minimal voltage drop!
Includes full color step-by-step instructions and all hardware shown.
Full specifications outlined below.
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Description
Specifications
Wiring to Battery: Dual 10 AWG TXL, terminated with a 5/16″ eyelet
Wiring to Fans: Dual 10 AWG TXL pairs, terminated with OEM style fan plugs
Maximum Current Capability: 35A per fan for a total of 70A
Typical Voltage Drop through wiring when driving a pair of 16″ fans requiring 25A continuous each with 13.8 VDC of input:
- Immediately after power up: 380mV or 2.8%
- After 30 minutes of continuous operation: 430mV or 3.1%
- After 1 hour of continuous operation: 440mV or 3.2%
Triggering is as follows:
- Fully automatic via thermostatic switch
- Fully automatic via air conditioning (fans come on when A/C compressor is running)
Thermostatic Switch Specifics:
- 185 degF ON / 175degF OFF
- Threads are 3/8″ NPT
- Includes 1/2″ NPT adapter
Dimensions of Relay Module with mounting bracket installed: 3″ x 3 1/8″ x 2″ (76.2mm x 79.38mm x 50.8mm)
Harness Lengths:
- Power Harness to Battery: 3ft
- Output Harness to Fans: 3ft
- Thermostatic Switch Harness: 4ft
- A/C Harness: 5ft
- Switched Power Harness: 6ft
Inrush Current Capability
Electric fans are highly inductive loads whose inrush current* can be up to four times the continuous current rating of the fan. We have measured the inrush current capability of the included 40A fuses at approximately 105A. This is compatible with 90% of the single winding fans on the market, assuming a properly functioning charging system. For fans with inrush current capability of 100A or greater (like many high quality 14″ or 16″ fans, off-road fans, etc.) as well as vehicles with charging systems outputting in excess of 14.4 VDC with the vehicle at operating temperature, we recommend that you swap the 40A fuses for our 30A MINI Circuit Breakers which have an inrush current capability approaching 600A!
*Inrush current is the current required of the fan motor when starting from a dead stop.
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