5akman
Full Access Member
- Joined
- Jan 10, 2017
- Posts
- 127
- Reaction score
- 29
- Location
- CA
- First Name
- Lance
- Truck Year
- 1984
- Truck Model
- K20
- Engine Size
- 350
Just finishing up my tbi to carb swap. Working this rig on the beach was the reason for the attempt to remove as much electrical as possible under the hood. The salt water environment has played havoc on my 1990 Dodge 3/4 ton tbi as every year I'm replacing corroded sensors.
Anyway, new cam (summit 0032, 204/204, .421./.421, 110 lobe separation) on a used Wieand Stealth manifold with Edelbrock Thunder AVS 650 cfm carb and new Hei.
I have the initial timing set at 10 degrees with vac unhooked. 17" of vacuum at idle. I checked today and got 28 degrees of total timing all in at 2000 rpm with no vac advance and, the timing did not increase after 2000. Hooking up the advance to ported vac, I get 40 degrees at 2000 rpm and no increase thereafter.
I know very little about setting up ignition timing but I've read enough to know that all this sounds like way too much timing way too early in the rpm range.
Where do I start?
Anyway, new cam (summit 0032, 204/204, .421./.421, 110 lobe separation) on a used Wieand Stealth manifold with Edelbrock Thunder AVS 650 cfm carb and new Hei.
I have the initial timing set at 10 degrees with vac unhooked. 17" of vacuum at idle. I checked today and got 28 degrees of total timing all in at 2000 rpm with no vac advance and, the timing did not increase after 2000. Hooking up the advance to ported vac, I get 40 degrees at 2000 rpm and no increase thereafter.
I know very little about setting up ignition timing but I've read enough to know that all this sounds like way too much timing way too early in the rpm range.
Where do I start?
