Help! creaping ignition advance, weak springs?

jpnovak · 07-03-2004, 01:10 PM

Now that the project is up and running I am trying to get it all tuned up. I am really having a hard time setting timing.

78 SC 3.0 with webers.

I am trying to set at 30deg max advance at 6K. I have no tach and thats another post. So back calculating from the max advacne of the dist I get about 10-12 deg BTDC at idle.

Here is my problem. If I set the timing anywhere bast 0 deg TDC the advance slowly creeps up to max advance. of course, my idle speed goes right along with it.

I have disassembled the dist. two times and I KNOW the weights are not sticking. I was wondering if stronger springs are needed. Do these dist springs wear out and lose their K?

Is there anything else to check if its sticking? I can't find anything.

jpnovak · 07-04-2004, 02:25 PM

How about them fireworks!?

dean · 07-04-2004, 03:23 PM

I don't understand your problem. At idle the advance changes or when you rev it? I do think springs can weaken with time and heat.
Dean

jpnovak · 07-05-2004, 08:48 AM

At idle the timing changes due to the advance. The dist is tight and I get about 20deg advace, equal to the total advance of the dist.

this means I can not set timing because it is dynamic when it should be static

dean · 07-05-2004, 10:22 AM

Does the centif. adv. feel weak? Turn the rotor by hand and see if it is very weak. You can get springs a your local speed shop and try stiffer ones

jpnovak · 07-06-2004, 06:07 AM

the rotor turns and snaps back without any problem. compared to my targa I don't feel much difference in tension.

I see if I can locate stiffer springs