Why a "hotwire"it and what does it do?
The hotwire kit brings the output directly from the alternator to the fuel pump with a larger gauge wire so that the volage to the pump is higher than stock.
From the Racetronix Site:
http://www.racetronix.biz/customkititems.asp?kc=RFPK-011&eq=
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[FONT=Arial, Helvetica, sans-serif]The Wiring Harness[/FONT][/SIZE]
[FONT=Arial, Helvetica, sans-serif][SIZE=-1]All fuel pumps are voltage sensitive, the lower the voltage the lower the fuel volume. Gerotor pumps exhibit a significant increase in fuel volume with increased supply voltage. A Walbro pump's average fuel volume increases over 18% by increasing the supply voltage from 12 to 13.5 volts. The factory harness is marginal at best for supplying a factory pump with enough voltage to perform well. This is why the 'hot wire' modification is so popular. Replacing the factory pump with a high-performance pump such as the Walbro GSS340M can easily double the current demand under W.O.T. pressures. The voltage drop in the factory harness increases proportionally to the current demands of the pump. Racetronix has documented tests where the voltage drop in a factory harness has caused over a 25% drop in fuel pump volume. The Racetronix harness uses heavy 10 gauge copper wire to reduce voltage-drop to very low levels. The factory gauge of wire used is
three gauges thinner. Our power feed comes off the back of the alternator where voltage is highest. It then runs through a weatherproof fuse holder and then to the back of the car. The Racetronix harness uses three-position male and female Weatherpack connectors which plug inline with the factory harness at the back of the tank. No cutting or splicing is required. High-quality weatherproof fuse holders and relays are used for maximum reliability. The Racetronix harness has a redundant ground upgrade as it is necessary to improve the harness on the negative side of the pump's supply as well. Racetronix supplies a spare ATO fuse, black vinyl wire ties, silicon grease and mounting hardware with each kit. We are including as a bonus our optional battery to body ground upgrade kit. This kit upgrades the under-rated ground wire running from the battery to the inner side of the passenger's quarter panel.[/SIZE][/FONT]
[FONT=Arial, Helvetica, sans-serif][SIZE=-1]Racetronix harnesses are considered the best by which all others are judged. Attention to detail in every Racetronix harness is evident at first glance. Racetronix spares no expense to ensure reliability, ease of installation and performance.
All Racetronix harnesses are assembled using our computerized crimp-quality monitoring system and then circuit checked for the utmost in reliability. This Racetronix harness is backed by our limited lifetime warranty.[/SIZE][/FONT]
