Lots of initial timing necessary. Help?
Dr. Detroit
Joined: Mar 2012
Posts: 10,097
Likes: 4,027
From: New Braunfels Texas
If you are at 30 at idle, that means you are in the high 40's low 50's total......and we all know that can't be right. Is it going to this number (46-52 or so) when you rev it? At that much lead total, with your engine.....it is going to spark knock and or detonate.....
So use deductive reasoning:
We all know that sbc/bbc runs fine at 15-17 initial.
We know that 36 degrees is the total number to shoot for.
It will not run well at less than "30" indicated.
So.....either the timing tape is off, backwards or not close to being the right tape for the diameter of the balancer, or you are not getting enough fuel at idle when retarded.
Take pictures of you tape/balancer, carb, anything that might be pertinent.......
Edit: I just read your other thread.....454 with a healthy cam, converted back to points.
Did you set dwell when you put the points in?
I feel that what you see and the actual timing are two different things and something is causing that.
Jebby
So use deductive reasoning:
We all know that sbc/bbc runs fine at 15-17 initial.
We know that 36 degrees is the total number to shoot for.
It will not run well at less than "30" indicated.
So.....either the timing tape is off, backwards or not close to being the right tape for the diameter of the balancer, or you are not getting enough fuel at idle when retarded.
Take pictures of you tape/balancer, carb, anything that might be pertinent.......
Edit: I just read your other thread.....454 with a healthy cam, converted back to points.
Did you set dwell when you put the points in?
I feel that what you see and the actual timing are two different things and something is causing that.
Jebby
Last edited by Jebbysan; Sep 23, 2020 at 07:28 AM.
Le Mans Master
Joined: Aug 2017
Posts: 8,336
Likes: 2,810
From: Cool Northern Michigan
There you go. Incorrect timing tape maybe?
So, here is the question:
When you applied the tape, I assume it is sticky on one side, you looked for the TDC on the balancer as a starting point and pressed the tape into position.. How well did the ends of the tape meet-up?
(6" tape on a 8" balancer?)
(8" tape on a 6" balancer?)
Stranger things have happened.
Next question:
Tell us about the Timing Pointer on the timing cover.
So, here is the question:
When you applied the tape, I assume it is sticky on one side, you looked for the TDC on the balancer as a starting point and pressed the tape into position.. How well did the ends of the tape meet-up?
(6" tape on a 8" balancer?)
(8" tape on a 6" balancer?)
Stranger things have happened.
Next question:
Tell us about the Timing Pointer on the timing cover.
Last edited by HeadsU.P.; Sep 23, 2020 at 07:04 PM.
