Vaccum advance??

[bluex]

Well after beating my head againts a wall for two weeks I finally broke down and pulled the distributor retimed it and it fired right up. Guess I had a plug wire out of order?

Anyways I was shooting for 12* before but wound up with 10. As soon as I hook the advance up AT IDLE it jumps straigt up to 28*. I know its good to have it come in as soon as possible, but at idle seems a little to quick to me and could be why its not performing the way I think it should.

Do I need a new canister or a new spring and weight set? I found the weight set in summit, but no canisters. Probably better off to do all of it right? I switched it to my ported hook up so it now has 12 at idle, but if you barley touch the throttle and give it vaccum it jumps to 28.

Now on to fixing the rear end.

[swervin ervin]

Yes, you need a new canister. A Crane adjustable vacuum advance canister. Stock cans usually provide 20 to 25 degrees of advance. A lot of folks will tell you to hook it up to a ported source. This will lower the advance at idle but IMO, is the wrong way to go about it.

Read this article.

http://www.73-87.com/7387garage/drivetrain/hei.htm

[TIMSPEED]

Originally Posted by swervin ervin

A lot of folks will tell you to hook it up to a ported source. This will lower the advance at idle but IMO, is the wrong way to go about it.

I 100% agree with Mike on this one. I've been running with my advance on ported...I just now switched it over to full...MAN! I can't tell you how much of a difference it made. INSTANTLY! It was like NIGHT and DAY! Now, when I even TOUCH the throttle from a dead-stop, it will INCENERATE the rear tire. You just gotta make sure you're not running too much timing for your gas (ie: getting pinging/knocking/surging)

[Blue Beard]

Good article, lot there I never thought about.