Mech. advance Dizzy set timing @2500RPM?

[Arshloch]

I have a mechanical advance dizzy with no vacuum port. Do I set timing at 2500RPM like a ti or tii motor and not at 1400RPM for a regular 2002? I have heard some people recommending it. It seems if that was a tii dizzy 25 degrees at 2500RPM would not be enough advance.

Its an 002 dizzy.

[02for2]

It won't hurt to do that and if you don't like it, you can always reset.

Each and every car is different (different fuels, wear, etc.) and more often than not, I find that the timing spec isn't always the best for that car, so I usually play around with it a few degrees here and there until I feel it's really dialed-in. My timing light has a variable advance built in, so I can turn the dial a few degrees either way and rotate the dizzy til the marks align.

One thing to be sure of is that your dizzy does in fact advance when/where it's supposed to. This can be checked with a timing light and tach - set each up and then add throttle until you see the timing marks jump and note the RPM, again, with my light, I can even tell by how many degrees it has advanced.

The dizzy may have a mechanical advance, but if the springs are old and weak, you may find that the timing advances prematurely - the fix would be new springs on the centrifugal weight(s). You can even change this to suit your taste by using different springs/weights, though sourcing them could be an issue. But there are places that will recurve your dizzy and the cost usually isn't too great.

Cheers!

[c.d.iesel]

.....set the "BALL" mark in the window at 1,400 rpm

[TobyB]

I find that 35-38 degrees total advance works pretty well for my car...

I set it at 4k, because my dist. is all in by that point.

t