Need a Mopar guru: 273 part-throttle ping driving me crazy!
Hi d55dave and 66fs,
I had vacuum advance disconnected + plugged. Right now initial timing is at 5 BTDC. Had it at 5 ATDC as well (retarded), and it still pinged, with vacuum advance disconnected + plugged. Started poorly at anything ATDC, so left it at 5 BTDC having run it at 10BTDC and still pinging. I can't remember, but I think mechanical is advancing to 25-ish BTDC at 2.5k - 3k RPM. With vac connected it was somewhere in the 40s (yes, above the 35 max), but I can't adjust the vacuum canister (see below).
Distrib is out of old orig 318 is n/a as it was sold for parts/traded by previous owner... =(
This distrib (Prestolite 3438225) won't allow me to adjust the vacuum advance canister with the 3/32 hex wrench, the vacuum hole is too small for it to fit... However, with vacuum disconnected/plugged, it still pings...
Attached are some photos from a few months back. Best I have for now as my phone broke last week...
What model Holley is this?
Hi d55dave and 66fs,
I had vacuum advance disconnected + plugged. Right now initial timing is at 5 BTDC. Had it at 5 ATDC as well (retarded), and it still pinged, with vacuum advance disconnected + plugged. Started poorly at anything ATDC, so left it at 5 BTDC having run it at 10BTDC and still pinging. I can't remember, but I think mechanical is advancing to 25-ish BTDC at 2.5k - 3k RPM. With vac connected it was somewhere in the 40s (yes, above the 35 max), but I can't adjust the vacuum canister (see below).
Distrib is out of old orig 318 is n/a as it was sold for parts/traded by previous owner... =(
This distrib (Prestolite 3438225) won't allow me to adjust the vacuum advance canister with the 3/32 hex wrench, the vacuum hole is too small for it to fit... However, with vacuum disconnected/plugged, it still pings...
Attached are some photos from a few months back. Best I have for now as my phone broke last week...
What model Holley is this?