Confirming Vacuum Advance Can
Thread Starter
Racer
Joined: May 2013
Posts: 421
Likes: 6
From: Chicago IL
Confirming Vacuum Advance Can
Does anyone know how to confirm the vacuum advance units? I bought this one and thought it would say AR23 as per Lar's paper, but instead it has a 236 stamped on it. Any help would be greatly appreciated.
Melting Slicks
Joined: Mar 2005
Posts: 2,095
Likes: 299
From: Midlothian VA
Looks like VC1853=AR23=VC236
Application
VC1853 AR23 1976 350 All Calif. 5-7 7.5 @ 11-12.5
1976 350 Vette Calif., Exc. Hi Perf
1976 400 All, Exc. Calif
1975 350 4-bbl
1974 350 All w/1112528 Distr.
1978 350/400 Heavy Duty Truck, Exc. Calif, Exc. Hi Alt.
Descripition
Brand：GM
Part Number(s)：1973482
ProductName：Vacuum Advance
Cross Interchange Parts
Factory Number
AIRTEX 4V1054
CARQUEST 57-7563
STANDARD MOTOR PRODUCTS VC-236
WELLS DV1853
GM 19138053
ECHLIN VC1853
Application
VC1853 AR23 1976 350 All Calif. 5-7 7.5 @ 11-12.5
1976 350 Vette Calif., Exc. Hi Perf
1976 400 All, Exc. Calif
1975 350 4-bbl
1974 350 All w/1112528 Distr.
1978 350/400 Heavy Duty Truck, Exc. Calif, Exc. Hi Alt.
Descripition
Brand：GM
Part Number(s)：1973482
ProductName：Vacuum Advance
Cross Interchange Parts
Factory Number
AIRTEX 4V1054
CARQUEST 57-7563
STANDARD MOTOR PRODUCTS VC-236
WELLS DV1853
GM 19138053
ECHLIN VC1853
Tech Contributor
Joined: Aug 1999
Posts: 14,380
Likes: 6,391
From: At my Bar drinking and wrenching in Lafayette Colorado
The units stamped "55" are the same as an AR23. They are from a different supplier, but the specs are the same - I've tested them on my SUN machine.
Lars
Lars
Le Mans Master
Joined: Jul 2006
Posts: 8,117
Likes: 104
From: charlotte north carolina
Harbor freight sells a $6 "Transfer Pump" which includes several hose adapters. If the input side is connected to a vacuum gauge and the advance can, the vacuum needed to fully deflect the diaphragm can be easily tested. It holds a surprisingly good vacuum! It can also be used while the dissy is installed in the engine during road tests.
Thread Starter
Racer
Joined: May 2013
Posts: 421
Likes: 6
From: Chicago IL
So today, another member and I were testing the supposed VC1853 vacuum can and noticed that the advance kept coming in past the 12.5" rating all the way up to 15". Is there always that much play in these cans?
VC1853 AR23 1976 350 All Calif. 5-7 7.5 @ 11-12.5
1976 350 Vette Calif., Exc. Hi Perf
1976 400 All, Exc. Calif
1975 350 4-bbl
1974 350 All w/1112528 Distr.
1978 350/400 Heavy Duty Truck, Exc. Calif, Exc. Hi Alt.
VC1853 AR23 1976 350 All Calif. 5-7 7.5 @ 11-12.5
1976 350 Vette Calif., Exc. Hi Perf
1976 400 All, Exc. Calif
1975 350 4-bbl
1974 350 All w/1112528 Distr.
1978 350/400 Heavy Duty Truck, Exc. Calif, Exc. Hi Alt.
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