How to determine EXACTLY where TDC is?, Valve adjustment advice needed Options

[JeffBowlsby]

Eyeballing alignment of the rotor to the tick mark on the dizzy body seems so imprecise...for adjusting valves. Is there a method of locating TDC for each cyl PRECISELY?

1. I thought about making some kind of rotor replacement device with a pointer that could extend down close to the tick mark, but thats only good for cyl 1. All cylinders needed.

2. I thought about making a special trigger point plug adapter with three long wires, and attaching it to me DVM on the buzzer setting. When the trigger points would make contact, then that would indicate...? I am not sure that the trigger points make contact at TDC, I think it is at some different point in the cycle.

Any time proven methods?

[jimkelly]

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[realred914]

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Gawd, that is horribly complicated. just do one pair of valves at a time, it is much easier, no complex order to remember doing it that way for 30 years and I dont need to remeber any special order.

simply set at TDC for 1 and adjust both number 1 valves, then rotate to number 2 tdc and do both number 2 valves etc..........

this aint rocket science, keep it simple. and remember you only need to be close to TDC for each adjustment, as teh cam has a rather large non-lobe area. the rotor location verses the one number one position mark on the dizzie case is presicion enough for my eyeball.