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?

[McMark]

Your rotor is pointing at the line in the distributor housing (arrow). The motor is at TDC. So you should be close enough to start it, then you need to adjust the timing while the motor is running with a timing light.

Your spark plug wires should connect into the cap as illustrated.

[JRust]

Your rotor is pointing at the line in the distributor housing (arrow). The motor is at TDC. So you should be close enough to start it, then you need to adjust the timing while the motor is running with a timing light.

Your spark plug wires should connect into the cap as illustrated.

AHHH! (IMG:style_emoticons/default/pray.gif) Now that I understand. I was thinking way to much about the rotor. As long as I have where its pointing as my #1 for the firing order. Got it thanks guys. I knew it wasn't as dificult as I was making it (IMG:style_emoticons/default/dry.gif) .

Whats with the rev limiting rotor? Any benefits to that over a stock one? I knew it was a different one but didn't know much about it.