Battery Relocation Page
To install a big downpipe, you may want to consider moving the battery to the trunk or under the back seat.
That gives you extra room for the downpipe and eliminates the chance of ruining the battery with the heat of the exhaust.
Moving the battery is a pretty easy thing to do, however it is a bit of work as you need to rip apart the interior of the car!
Another drawback to this, is that I have fought with noise in the radio for ever since moving the battery.
This annoyance is a small price to pay for performance of the big downpipe though!
My final design is as follows:
I use a 100 AMP breaker in case a power wire shorts out and it is also a good storage system.
You can just flip the breaker and all power is lost to the car.
Some people have asked if the breaker trips when starting the car, and the answer is that it has never tripped, ever.
This will ensure a good, solid connection.
Be sure to run the power wires next to each other and cross them over each other every foot. This keeps the EMI down.
Mine come from the left side (facing the rear of the car), then go across the backseat, and then go down the right side of the car.
I ran the main power wires through the firewall to the right of the clutch pedal and below the clutch master. Be sure to use some rubber grommets for the wires. (Available at a small hardware store)
I attached the ground wire directly to the engine block near the starter. The preferred location is something much closer to the battery, but I was having major electrical issues before connecting to the block.
In order to solder the 4 gauge connectors onto the wire you will need a propane torch, some solder flux and some solder.
This process takes some time to perfect, but after 2-3 connectors you will become an expert!