Trying to identify '64 vacuum advance can

[Scott Butville]

I replaced a vacuum can with the letters MS with a line under it and 210 16 below the line with the Echlin VC 1810 on my '64 SHP. Just curious to know the specs on the unit I tossed.

[William C.]

Re: Trying to identify '64 vacuum advance can

Advance starts at 6-8 inches of vacuum, all in at 14.5-16 inches. 8.5 degrees Dist advance (reference the 16 number as 16 degrees crank advance 210 is vac unit 1116210 GM part number

[Scott Butville]

Re: Trying to identify '64 vacuum advance can

Bill, Thanks. I should definitely see some improvement in the idle stability by changing to the VC 1810. It should also help my fuel percolation problem.

[Duke W.]

Re: Trying to identify '64 vacuum advance can

Yes, the VC1810 matches the specs of the original Delco "236" can, which starts at 4" with 16 degrees at 8". Being as how a '64 SHP only produces about 10" at idle it just barely begins to pull the 210, so the engine does not have sufficient total idle timing, and will probably run hot.

Also, the lack of total idle timing, and the fact that the timing will vary because there is not sufficient vacuum to pull the vacuum advance to the stop and hold it there will cause idle instabily.

You should notice considerably better idle quality, better low speed performance, and lower operating temps with the VC1810.

Have the wrong ten dollar vacuum can in an engine can really foul up its operating characteristics, and it's a very common problem.

Duke

[RICK CHARLES]

Re: Trying to identify '64 vacuum advance can

what is a can with letters MS with a line under it with the # 163 16 MEAN ?

[Duke W.]

Re: Trying to identify '64 vacuum advance can

Delco vacuum cans of the sixties and seventies era have the last three digits of the GMPD long part number and the maximum crankshaft advance stamped on the bracket - like 163 16.

I have never see one with underlined MS stamped on it, but it could be a manufacturer's ID on a later service part.

Duke