Basic timing is set by the computer itself - so no matter if you turn the distributor 5 degrees one way or the other, the computer will compensate for this change in timing. Look closely at the rotor - it's pretty wide on the end. All the computer cares about is that there be a certain degree range of contact between the end of the rotor and any one plug terminal in the cap.
I've just done an analysis of a 4.0L AMC engine by compensating an aftermarket camshaft gear to its original distributor. The distributor (non-adjustable timing) had to be mounted 25 degrees CW in order to function to this new camshaft (AT NO. 1 TDC). As for TIMING the 4.0L engine - the computer takes care of this, and NO AMOUNT OF FIDDLING WITH IT WILL ALTER ENGINE TIMING.
Just as long as that rotor is DEAD on the NUMBER 1 CYLINDER AT TDC, the computer will handle this timing ITSELF. It also controls advance and retard based on environmental and other physical conditions.
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Today's Featured Article - Bad Vibes - by Curtis Von Fange. One of the strangest ways to communicate with our tractor is to ask it how it feels. "Ask it how it feels," you say? Yup, ask it how it feels. Now, as with the other articles in this series one has to be able to hear what 'ole blue' is trying to say in response. The nice thing about our old iron friends is that they are usually quite consistent in their response, rather unlike some people I know who might change what they say due to the weather or other mitigating circumstances. But since t
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