Re: Re: 361 Engine suggestions

In a message dated 11/12/2011 12:47:25 A.M. Central Standard Time, ericsturgis@xxxxxxxxx writes:

The "Rotor" is the thing that spins underneath the cap that send the spark from the coil, through the points to the cap,

Sorry,,,I am not trying to nit-pic here, but with all of the young people we have on the list, I think that for their own understanding of a distributor that the above statement should be clarified

The "Rotor" is the thing that spins underneath the cap that send the spark from the coil

that statement is true

the spark from the coil goes to the middle post on the distributor cap, to the rotor, which turns and makes contact with the outer (spark plug wires) posts on the cap

through the points to the cap,

this statement is wrong, or misleading at best,,,, the points actually are what open and close making a complete circuit to power the coil, which in turn causes the coil to send out a spark (to the rotor),,,,,, the actual spark does not go through the points

Those of you who totally understand a distributor can disregard the rest of this email, on the other hand if the workings of a distributor are in the grey area of your tech, please read on and I will go a bit deeper .

A distributor is one of the final steps of getting the spark to the sparkplug's at the correct time to cause the engine to run correctly, it begins at the crank, which is connected to the cam by means of a timing set, usually consisting of two gears and a timing chain, the timing set keeps the crank and cam in time with each other, causing the valves to open and close at the correct time with the position of the pistons. On the cam is another gear drive, which turns an intermediate shaft, sometimes called a distributor or oil pump drive, the distributor drops into the top of the block, and is driven by this gear, the distributor housing turns freely while sitting in the block, and this is where your timing is adjusted with use of a timing light attached to the #1 plug wire and aiming the light at the HB to see the timing marks. At this point the distributor starts doing it's part which consists of several things, as it turns, it mechanically (points type distributor) opens and closes a set of points which completes the circuit to the coil and causes the coil to send out a high voltage charge from the coil to the center terminal of the distributor cap which goes back inside the cap and to the rotor which is turning with the engine, as the rotor turns it completes the high voltage circuit between the coil and the individual plug wires located around the outer part of the cap, and delivering the HV charge at the correct time to the sparkplug, causing the fuel in the cylinder to fire.

Any one of the above mentioned items being worn can cause an engine to either not run correctly or not run at all.

To all the people that read through this long post, please feel free to add and or correct my statements,,,,,Let the truth be known,,,

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