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 Post subject: Vacuum advance
PostPosted: Tue Nov 20, 2007 3:45 pm 
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4 BBL ''Hyper-Pak''

Joined: Tue Aug 21, 2007 10:38 am
Posts: 49
Location: Antelope Valley, California, USA
Car Model:
Are you supposed to plug the vacuum advance to the manifold vacuum or ported vacuum? I have heard both. Also how should the vacuum pod be adjusted?


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 Post subject:
PostPosted: Tue Nov 20, 2007 4:06 pm 
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Joined: Thu Oct 31, 2002 5:39 pm
Posts: 24447
Location: North America
Car Model:
Ported vacuum -- not manifold. And the pre-'73 vacuum advance units are nonadjustable.

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 Post subject:
PostPosted: Tue Nov 20, 2007 4:09 pm 
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4 BBL ''Hyper-Pak''

Joined: Tue Aug 21, 2007 10:38 am
Posts: 49
Location: Antelope Valley, California, USA
Car Model:
I got a electronic distributor from a 74 with a HEI


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 Post subject:
PostPosted: Tue Nov 20, 2007 4:46 pm 
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Ah, OK. In that case, don't adjust the vacuum advance unless it gives indications of needing adjustment. A good way to check is to set the engine idle speed to spec, then alternately connect and disconnect the vacuum advance hose while the engine idles and you watch the timing mark with a timing light. if the mark moves as you connect and disconnect the vacuum advance, you need to add a little tension to the spring. Get a 3/32" hex key ("Allen wrench"), insert it into the hose nipple on the vacuum advance, and turn it one full turn clockwise. This should eliminate the vacuum advance at idle, which'll make it a great deal easier to attain a steady and consistent idle (and improve off-idle driveability, too). The one-turn suggestion is just a starting point; use your timing light to verify that there's no longer vacuum advance being applied at idle.

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 Post subject:
PostPosted: Tue Nov 20, 2007 5:33 pm 
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4 BBL ''Hyper-Pak''

Joined: Tue Aug 21, 2007 10:38 am
Posts: 49
Location: Antelope Valley, California, USA
Car Model:
ah, thanks. After I do that should I get the Mr. Gasket recurve kit?


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 Post subject:
PostPosted: Tue Nov 20, 2007 5:40 pm 
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Supercharged
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Joined: Thu Jan 27, 2005 8:32 pm
Posts: 7834
Location: Portland-ish
Car Model: Fiat 500e
Dan,

While we're on the subject... Who makes a decent replacement vacuum advance canister? Any idea if the Standard Motor Products cans are adjustable?

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 Post subject:
PostPosted: Wed Nov 21, 2007 8:51 am 
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Supercharged
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Joined: Mon Jan 15, 2007 5:05 pm
Posts: 3767
Location: Black Diamond, WA
Car Model:
The Mr.Gasket recurve kit is no longer available for MOPAR's.
If you find one or two, by two and let me know, I would like one.
Been looking for one for a year now! :(

Thanks,

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74 Swinger, 9.5 comp 254/.435 lift cam, 904, ram air, electric fans, 2.5" HP2 & FM70 ex, 1920 Holley#56jet, 2.76 8 3/4 Sure-Grip, 26" tires, 25+MPG


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PostPosted: Wed Nov 21, 2007 8:55 am 
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Supercharged
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Joined: Mon Jan 15, 2007 5:05 pm
Posts: 3767
Location: Black Diamond, WA
Car Model:
Dan,

On Joshie's question, who makes a 11R adjustable can, I have one but can not find anymore for my other cars.....

Thanks,

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Aggressive Ted

http://cid-32f1e50ddb40a03c.photos.live ... %20Swinger


74 Swinger, 9.5 comp 254/.435 lift cam, 904, ram air, electric fans, 2.5" HP2 & FM70 ex, 1920 Holley#56jet, 2.76 8 3/4 Sure-Grip, 26" tires, 25+MPG


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 Post subject:
PostPosted: Wed Nov 21, 2007 10:03 am 
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4 BBL ''Hyper-Pak''

Joined: Tue Aug 21, 2007 10:38 am
Posts: 49
Location: Antelope Valley, California, USA
Car Model:
autozone holds them for mopars


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 Post subject:
PostPosted: Wed Nov 21, 2007 10:07 am 
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Joined: Thu Oct 31, 2002 5:39 pm
Posts: 24447
Location: North America
Car Model:
It's possible that all the aftermarket units are being made in one factory and just sold through the various brands, but I don't know for sure one way or the other. AFAIK, all the '73+ units are adjustable, even the aftermarket replacements. Could be wrong on that, too. See this post for available advance cans and specs.

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 Post subject:
PostPosted: Wed Nov 21, 2007 7:03 pm 
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Turbo Slant 6
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Joined: Mon Nov 17, 2003 8:51 pm
Posts: 701
Location: Marion.Va
Car Model:
Borg-Warner pt.no.V411 is a nice looking peice that is an 11r can that can be adjusted to start coming in as early as 7.5 inchs of vac., or as late as 11.5 inchs of Vac.
If you can find a decent parts store with good parts man,they have hard books that have the cans listed with specs for degrees of advance as well as starting vaccum numbers.
HyperValiant

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