Question about ignition timing

[jhv48]

All of your advance should be in by about 3200 RPM. Hook up the timing light and start the engine. At idle with vacuum cannister disconnected, you should be about 14 degrees BTDC. Shine the light on the degree wheel. If so, blip the throttle a few times to 3200 and see where the pointer points. If it hits the desired numbers (36-38 degrees), you're ok. If not, you might have to add more initial timing or recurve your advance.

[Silverback51]

I bought a Weber this Sunday. It only pops when I ignite it.




Sorry Jim, couldn't help myself.

[TINNMANN]

Depending on your cam you may have to start with more advance IE. I have a fairly large cam ( 610 lift) and my base is set at 18 deg. total 34 all in at 3000 rpm vac disconnected. By doing that the motor is able to burn off the fuel rather than dumping it into the exhaust which can cause backfires or pops. The thing to watch for is too much advance because you won't be able to hear if the motor is knocking. You may have to recurve the dizzy to get the desired amount of advance in by about 3000 rpm just be sure that you disconnect and plug the vac advance and plug it before setting it up. If you have to buy a timing light spend the extra to get the dial back digital with tach it will make life much simpler. If you are running a vac advance I chose to use the timed port so at a idle there is no advance to the timing because as you add more base timing you could get to a point that kickback could happen.
Cheers Greg

[patrickt]

Jim, you can do this job yourself. First, read this to learn about the different type of timings: http://www.gofastforless.com/ignition/advance.htm and then watch this video: http://www.videojug.com/webvideo/how...iming-on-a-car and then set your total amount of timing at, say, 3500RPM. One point that I'll add is don't turn the distributor when you have the RPMs up at 3500. Instead, watch the timing under your light at 3500RPM and then let the engine slow back down to idle, turn the distributor a little bit, and then rev it back up to 3500RPM to see if you have it set correctly.

[Steve Bisson]

Jim,

Timing is a relative easy thing to accomplish. As mentioned initial should be 12 to 14 degrees with a total of 32 to 34 in at 3,000-3,200rpm.
Let me know if you need a hand.