67 A.I.R. Distributor vacuum can

[Mike E.]

I've not found this one in the judging manual--what is stamped on the vacuum can on the 300 HP 67 AIR distributor? (Dist no. is 1111194) The vacuum can on it is stamped 163 16
Correct? Any help is appreciated.
Thanks,
Mike Ernst

[Clem Z.]

interesting corvette distributor website

http://www.corvettemagazine.com/2000/march/dist/distp1.asp

[William C.]

Re: 67 A.I.R. Distributor vacuum can

Mike, per Delco Remy Test specifications, 1111194 uses a 1115355, 8 degrees distributor advance (16 crank) all in at 12.7 inches of vacuum, would be stamped 355 16

[Mike E.]

Re: 67 A.I.R. Distributor vacuum can

Thanks, Bill!!!!! Except, now I have a wrong one on the distributor and need to find a correct one. Would it be correct to assume that the 194 distributor came with the 355 vcacuum can whether or not it was California AIR? Or did the owner likely change the vacuum can when he pulled the AIR equipment?

[William C.]

Re: 67 A.I.R. Distributor vacuum can

The 163 has specs that require nuch higher vacuum (as high as 18 inches) to obtain full advance. there are a number of service alternatives or Corvette Central reproductions that would do a better job functionally, CC has the 355 in reproduction, my only advice would be if you purchase one is to check it's function with a vacuum pump to see it the pull-in vacuum is close to the chevy spec. I don't think there is much demand for the 163, it is far from a high perf item.

[Alex K.]

Re: 67 A.I.R. Distributor vacuum can

Bill,

Why do some vacuum advance cans have a limit bushing and some do not?

Thanks Al

[William C.]

Re: 67 A.I.R. Distributor vacuum can

I think it's a low cost way to adjust the "all in" spec. If you look at a spec table, there are fewer "all in" ranges than you might think so the rubber stop might be a means of adjustment between ranges. Or it may be there to lessen vibration transmitted to the points plate in the distributor. I was not privy to the engineering details for those items, but not all distributors seem to have them, so this is pure uninformed speculation on my part.

[Clem Z.]

nothing to do with points vibration because

some HEI distributor have them. i think it was to fine tune the total vacuum advance.

[Joe L.]

Re: 67 A.I.R. Distributor vacuum can

Mike-----

As far as what GM says, all GM #1111194 distributors wewre originally assembled with a 1115355 vacuum control. Regardless of what engine the 1111194 distributor was installed on, it would have had this vacuum control.

[William C.]

Re: nothing to do with points vibration because

Thanks Clem, but I wasn't thinking of points vibration, I was thinking of reduced wear on the hole the arm goes into on the rotating plate. I agree the advance tuning was most likely the primary function.