sauceyI986

I done a bunch of searching and dont understand this. When relocating the battety to the trunk why do people run the positive to the starter what is the reason for that..

Jon316G

iTrader: (1)

Even without relocating the battery, the positive terminal of the battery is still connected to the starter.
If you connected the battery's negative terminal to the starter, how would the starter motor receive any voltage?
Think of the basics on how electricity flows and you'll understand why.

sauceyI986

Ok that makes real good sence so if that positive terminal is going the starter would there only be one negitave cable going to the back to the trunk that connects to the battery.

Jon316G

iTrader: (1)

The starter itself is grounded to the body/transmission, so it doesn't have a "negative cable" running from it.
Remember... the negative side of the battery is connected to the car body/frame.

NgoRX8

iTrader: (1)

Just run the negative and positive from the battery wires in the engine bay. it's not that hard to do.

Highway8

iTrader: (11)

Here is the way I did it. On the stock battery, you have 2 positive wires. One for the engine bay and the other to the starter. When relocating the battery, I connect the 2 postive wires and then run a positive wire from the battery to the starter. The start now obviously has power and because the stock starter positive wire that ran to the battery is now connected to the second (engine bay) positive wire, we have power everywhere.

Running positive and negitive wires from under the hood all the wya to the trunk will add extra cost, weight and complexity of getting the wires ot of the engine bay.

For the ground wire, you can just round the battery to the frame in the trunk, or you can run the negative wire to the block near the starter.

sauceyI986

Thanks it makes a lot of since to me now

monchie

Spelling corrected, just wanted to do it...lol

skc

I plan on doing a relocation today. I will run the negative from the battery to the body.

Does the negative from the old battery connection point go back to the body or does it need to go to the engine block?

Highway8

iTrader: (11)

Just ground the old negative to the body. If I remember correctly, i used a screw from the old battery box and hole on the support under the stock battery location.

gmoney

When relocating the battery to the trunk is their a certain spot thats best to put it?

paimon.soror

iTrader: (15)

preferably on the passenger side to help counteract the added weight from the driver.

Highway8

iTrader: (11)

Some people put it as far back and to the side as possible. I put mine directly over the axle and used the rear strut brace bracket/bolt for grounding, just be sure to use an unpainted bracket.

paimon.soror

iTrader: (15)

Yup, that's where I plan on bolting mine to. Last thing you need is a battery fastballing through your windshield in the event of a collision.

Highway8

iTrader: (11)

Mine sits between the back seat and the rear strut tower bar. I am using the Braille 15lb battery and the associated battery mount. I believe I am only using 2 or 4 self taping screws to hold the mount to the car. Its been there for 3 years and never moved.

A tip to anyone using a lightweight racing battery. Invest in a good smart charger, the racing batterys do not like to be ran dead and they tend to discharge faster 9whole sitting) then traditional 30lb batteries. Also, if you have some sort of OBD2 reader display that stays connected all the time, most have a small draw on the battery. 3 days sitting will almost kill your racing battery. Do that a few times and the battery will be trashed.

My solution is to pop my trunk, hook up my charger and charge the battery after every drive. If I am DD the car I dont do this, but I have not DD my car in a while.