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Grounding System Mod for the GT
by JPJR (difficulty level: medium)
Improving the cars grounding system is a modification that is easy
to do. Some people notice good results while others don't notice a difference. I have never heard of anyone losing power,
though. I myself noticed the engine seemed stronger and power was smoother after installing the wires. There are a few different
methods of doing this, and if you want to spend the money, they sell kits that cost from $40-120. I chose the following method
for ease of installation, clean looks, and cheap cost.
I used 10' of 8 gauge quality ground wire ( the type used for car
amplifiers,$5-10), 6 gold plated ring terminals($3-6), and die-electric grease ( purchased at auto parts store $1-3). Wire
and ring terminals can be purchased from a stereo shop or electronics store. I ordered mine from www.partsexpress.com. Great prices and services, but I would order more or it might not be
worth the shipping just for these parts. Even with shipping, they were cheaper than my local electronics store though, so
shop around and have fun.
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Step by Step Instructions
1. Attach a ring terminal to one end of ground wire. Loosen and
remove nut from battery negative clamp. Install ring terminal and re-install nut. Measure wire from battery to coil location
and cut to proper size (about 4-5 feet). Keep left over wire.
2. You can route the new ground cable alongside the stock one from
the battery to the engine coil grounding point. Be sure to secure wire to keep it from damage.
3. Remove nut on coil hold-down. Install ring terminals on the battery
to coil wire and to one end of the left over wire from step 1. Apply light film of die-electric grease to both ring terminals
and install on coil hold down. Reinstall nut and tighten. Route extra wire under the coils to the intake manifold (where the
stock ground cable goes from the intake manifold to the firewall).
4. Measure wire to intake grounding point and cut to proper size.
Install ring terminal on wire. Remove stock 12 gauge ground wire that goes from the intake manifold to the firewall. With
last piece of wire, cut to same length as stock the short 12 gauge ground wire and install last two ring terminals to both
ends.Using thin coat of dielectric grease, connect wire terminal from coils and one terminal of last wire to Intake manifold
grounding point (same place as stock). After removing point and coating with dielectric grease, connect last terminal to stock
connecting point on the firewall.
JPJR
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