Thread: encourage bbc 509ci

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Yes, this CL120245-12 cam will make an excellent daily driver when paired with the proper torque converter. Install it straight up according to the cam card. Do not advance it or retard it.

First thing you'll want to do is to find top dead center so that you can begin experimenting with advancing the spark at the crank. I would use a degreed harmonic damper or a degree tape that will attach to your stock damper.

Begin with finding top dead center (explained below in the tech article) and begin advancing the spark a little at a time. You may find that this cam likes 14 or 16 or 18 or 20. But remember, as you dial more spark lead in at the crankshaft, you will have to reduce the lead that is added by centrifugal advance, so that you don't exceed about 38 degrees total advance.

You will get to the point where, as you continue to add initial lead in at the crank, the motor will begin bucking back against the starter. At that point, you will want to interrupt the hot line to the ignition coil and add a switch that you can use to switch off the spark to the plugs while you spin the motor up with the starter, then click the switch over to reinstate juice to the coil and begin making spark again. I think there are now automatic interrupters that can be wired into the ignition system, but I have never used one. Call the MSD tech line.

If it gets to a point where get yourself wrapped around all the following information about spark control, you will know more than 99% of hot rodders on the planet.
http://www.crankshaftcoalition.com/w...op_dead_center
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