This may be the most common question we’re asked. When it comes to keeping a high performance engine running cool, the electrical system plays a major role. Aside from audio power amplifiers, electric cooling fans are the most current hungry accessory in a vehicle and they require a continuous supply of current. A quality 13″ fan typically requires 20-25 Amps of current while running and up to four times that when it’s first turned on (hence the dimming dash lights). Ultimately, this has led us to develop our own line of high performance Fan Relay Kits unlike anything else on the market. In addition, it’s critical that the idle output capability of the alternator is satisfactory, the gauge of the alternator’s charge lead is suitable, and that you have a low resistance return path between the fans and the charging system. This led us to develop our own line of high performance Alternator Installation Kits. Optimizing each will help your vehicle to run cool on the street. Incidentally, these problems and their solutions are outlined in their entirety in Automotive Wiring and Electrical Systems, Volume 2: Projects.
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