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Vaccuum advance cannisters #3012979 02/07/22 11:20 AM 02/07/22 11:20 AM
Joined: Jun 2016 Posts: 906 Washington H hemienvy OP super stock
hemienvy OP super stock H Joined: Jun 2016 Posts: 906 Washington	Is there much difference in the amount of advance, the curve, provided by different cannisters ? I have never come across a chart with different vaccuum can part numbers, or how much advance they give. I'm interested in BB distributors, typical 60's / 70's stuff, or if there are any specialty aftermarket cans.

Re: Vaccuum advance cannisters [Re: hemienvy] #3012982 02/07/22 11:23 AM 02/07/22 11:23 AM
Joined: Jan 2003 Posts: 10,714 North Dakota 6PakBee I Live Here
6PakBee I Live Here Joined: Jan 2003 Posts: 10,714 North Dakota	IIRC the FSM's have the advance numbers for the vacuum advance. "We live in a time when intelligent people are being silenced so that stupid people won't be offended".

Re: Vaccuum advance cannisters [Re: 6PakBee] #3012985 02/07/22 11:30 AM 02/07/22 11:30 AM
Joined: May 2019 Posts: 6,246 nowhere S Sniper master
Sniper master S Joined: May 2019 Posts: 6,246 nowhere	The standard motors E catalog generally lists the amount of advance on their stuff.

Re: Vaccuum advance cannisters [Re: Sniper] #3012988 02/07/22 11:35 AM 02/07/22 11:35 AM
Joined: Mar 2006 Posts: 200 Maryland M mrob enthusiast
mrob enthusiast M Joined: Mar 2006 Posts: 200 Maryland	Here's a link from another site that shows how to limit the amount of advance using a wire or sheet metal clip placed on the canister arm. https://www.forabodiesonly.com/mopar/ams/how-to-limit-and-adjust-chrysler-vacuum-advance-cans.183/

Re: Vaccuum advance cannisters [Re: mrob] #3013011 02/07/22 12:48 PM 02/07/22 12:48 PM
Joined: Jun 2014 Posts: 1,323 VA D dragon slayer pro stock
dragon slayer pro stock D Joined: Jun 2014 Posts: 1,323 VA	Dual Point or Normal. Prestolite have arm # stamp and curve data in their book. Adjustable via shim washers and or spring. Newer mopar types have adjustable screw to help with curve. As stated the FSM also some info on this. G

Re: Vaccuum advance cannisters [Re: dragon slayer] #3013037 02/07/22 02:14 PM 02/07/22 02:14 PM
Joined: Sep 2003 Posts: 19,402 north of coder moparx "Butt Crack Bob"
moparx "Butt Crack Bob" Joined: Sep 2003 Posts: 19,402 north of coder	the adjustment is a 3/32" allen wrench inserted into the hose nipple. i' can't remember [really ? what a surprise ! ] which way turned increases or decreases the amount of vacuum needed to start the arm actuation. that could be confirmed by using a hand held vacuum pump, and watch what amount of vacuum it takes to start the arm to move.

Re: Vaccuum advance cannisters [Re: moparx] #3013183 02/07/22 09:25 PM 02/07/22 09:25 PM
Joined: Jun 2008 Posts: 3,916 usa L lewtot184 master
lewtot184 master L Joined: Jun 2008 Posts: 3,916 usa	they do vary. some will have different number of degrees in them and different spring rates.

Re: Vaccuum advance cannisters [Re: lewtot184] #3013337 02/08/22 01:21 PM 02/08/22 01:21 PM
Joined: Sep 2003 Posts: 19,402 north of coder moparx "Butt Crack Bob"
moparx "Butt Crack Bob" Joined: Sep 2003 Posts: 19,402 north of coder	correct Lew. that is another way to tailor the advance curve. this is where "try it and see what happens" comes into play. most of the time, a super tune is not done in one 20 minute period. just because your buddy runs advance can #xyz, doesn't mean it is the right can for your combination. it may be CLOSE, but not necessarily right ON. i think it's member Cab Burge that says : "tune, tune, and tune some more". lots of things to consider to get the most from your particular combination.

Re: Vaccuum advance cannisters [Re: moparx] #3013416 02/08/22 04:07 PM 02/08/22 04:07 PM
Joined: Jun 2008 Posts: 3,916 usa L lewtot184 master
lewtot184 master L Joined: Jun 2008 Posts: 3,916 usa	Originally Posted by moparx correct Lew. that is another way to tailor the advance curve. this is where "try it and see what happens" comes into play. most of the time, a super tune is not done in one 20 minute period. just because your buddy runs advance can #xyz, doesn't mean it is the right can for your combination. it may be CLOSE, but not necessarily right ON. i think it's member Cab Burge that says : "tune, tune, and tune some more". lots of things to consider to get the most from your particular combination. i agree. i can't count how many different distributor curves i've built for my two cars, plus all the hours and miles testing.

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