It's because of interference. Here's how I made my own battery cable. I took 14 12 guage wires , stripped the ends and wound them together on both ends. Then I mummified the whole thing in electrical tape. Instant battery cable!
A lot cheaper than buying a spool of battery cable.
The reason for the short ground is long wire builds resistance and this lowers your outgoing and incoming charge. Makes the whole system less efficient.
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91 GT Carb conversion, holley 600 double pumper, edelbrock performer intake, FMS "C" drop springs, march 1000 underdrive pullies, crane 1.7 roller rockers, GT-40P headers, bassani x pipe, american thunder catback, FMS 4.56's, msd aL6, trunkmount battery, A/C eliminator kit, 3000 stall tci streetfighter, AOD with transgo kit, A+ servo, 300M hardened lockup shaft, kevlar bands and 28,000 gvw trans cooler, 3 core radiator, 300 lbs stripped with a full interior
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