Another aspect of power distribution when wiring a car up or playing with the wiring in your car, it's not an uncommon perspective to put the battery in the boot.
Now, when you take an OEM car that has the battery in the boot, like a Skyline, they run a battery cable up to a battery terminal in the engine bay. Then they run from that battery terminal down to the starter motor.
The reason they do this is because the OEM factory know that a starter motor draws a lot of current and has a lot of electrical flyback.
They know that flyback can cause problems with other power distribution centres in the car. One other thing is that with a starter motor you've got a couple of hundred amps being drawn when the starter motor engages, to turn that motor over.
So, the power draw here, could pull that power source down to 10 volts. If you're trying to drive 6 injectors and 6 ignition coils and a starter motor off 10 volts, it's not really going to make a nice starting car.
So, if you are moving your battery to the boot, we recommend that you run a negative cable all the way to the engine, as well as to the chassis, and you run a positive cable to a remote battery post. Then from your battery post to your starter motor.
You don't connect directly to the starter motor. Connecting directly to the starter motor, even though it will save a couple of dollars in cable, and installation, you will have head aches further down the line, when you've got current draw and power losses when you are starting the engine.
No comments:
Post a Comment