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I am planning on firing my re-built engine while it's only in the chassis. As such I want to build a mock dash that has an ignition switch, a temp guage, an oil guage and a tach.
Questions:
For the distributor do I simply run straight 12v + & - from the battery to the + & - on the coil? or do I have to have a ballast resistor in the circut?
Does anyone know how the ignition switch should be wired?
I am planning on firing my re-built engine while it's only in the chassis. As such I want to build a mock dash that has an ignition switch, a temp guage, an oil guage and a tach.
Questions:
For the distributor do I simply run straight 12v + & - from the battery to the + & - on the coil? or do I have to have a ballast resistor in the circut?
Does anyone know how the ignition switch should be wired?
Thanks,
Bob
You need the ballast resistor in the coil feed circuit so you don't fry the coil. Photos below (my Grand Sport) show the kind of setup I've used for years for pre-run in the chassis.
The negative side of the battery (-) does NOT connect to the negative side of the coil, but only to ground. The only connection to the negative side of the coil is the wire from the points or, if you are using a Pertronix module, the black wire from the module. The positive side of the coil (+) is connected to the positive side of the battery through a resistor if you are running the stock coil and points or directly to the battery (through a switch so you can shut it off) if you are using the Pertronix and their Flamethrower coil. No resistor is required with their system.
This is the setup I use on all my new motors. 2 gal fuel tank, temp., oil pressure, vacuum and tach. I use a garden hose setup for cooling. No trying to set up a radiator and fan. And also no over heating problems ever. Cool water flowing through the block at all times during break in. A simple starter button and power to coil and ground. If running a stock fuel pump I use an electric pump to prime the carb. Once the carb is full I change over to the stock pump then fire it up.
When I worked in the Marine industry we would always "Run Up" a new engine for multiple reasons. Garden hose for cooling is all we would ever use. Al W.