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Adjustable vacuum advance canister

Posted By ianmatt 6 Years Ago
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ianmatt
Question Posted 6 Years Ago
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Surprisingly i am not finding a part number online for an adjustable vacuum advance fir the dizzy on my built 292. I have too much advance with manifold vacuum at idle. Thoughts? Part numbers? thanks guys
GREENBIRD56
Posted 6 Years Ago
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Does your distributor have the large Hex Nut looking fitting where the vacuum line connects? Those units will un-screw off the pot housing and there are shims there  to set the spring preload.

I've got mine at 7 degrees full vacuum can advance, 26 degrees of centrifugal and the initial at 10. That nets an idle advance of 17 and the stock cammed engine likes that just fine. 

http://forums.y-blocksforever.com/uploads/images/9ea2bf28-00c4-4772-9ac7-d154.jpg 
 Steve Metzger       Tucson, Arizona
oldcarmark
Posted 6 Years Ago
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What Distributor are You using? The Standard Exchange Units have an Advance Can that is adjustable using an Allen Key through the Vacuum fitting on the Can (If you don't have the Type described by Steve.

http://forums.y-blocksforever.com/Uploads/Images/a82cee8f-be33-4d66-b65d-fcd8.jpg  http://forums.y-blocksforever.com/uploads/images/339ed844-0bc3-4c73-8368-5dd3.jpg
ianmatt
Posted 6 Years Ago
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MArk and Steve thanks for the reply. I have an isky street cam. nothing real crazy. its the stock dizzy but I have pertronix. the original vac can on the dizzy was shot so I got a replacement from napa. it does have a very lary hex shape to the part of the body by the vac nipple where the line connects. is that the whole thing that unscrews? what do i need to do to take some advance out of it? thanks
GREENBIRD56
Posted 6 Years Ago
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Many of the replacement stamped steel housings have the hex shape - but don't have the original removable end I tried to describe.

The type that adjust with a hex key wrench (1/8 or 3/32) - you insert the hex key down the hose opening and engage a socket screw inside. They can be pretty stiff - so use force judiciously...... They also work sort of counter-intuitively - clockwise adds advance (unloads the spring) and counter-clockwise stiffens it up.

http://forums.y-blocksforever.com/uploads/images/9ea2bf28-00c4-4772-9ac7-d154.jpg 
 Steve Metzger       Tucson, Arizona
ianmatt
Posted 6 Years Ago
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Thanks again Steve. So before I posted in the forum I stuck several different sized allen wrenched into the end of my vac advance can and it didnt seem to grip anything to turn. I maybe have tried 5 different sizes. I have not tried a hex however. I'll see what I can get this evening after work. Sadly i think mine may not be adjustable. I would think the hex key would have come with it correct? thanks again for the help.
GREENBIRD56
Posted 6 Years Ago
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"Allen" and hex key wrenches are one and the same in my world - so no joy there.....  These are the instructions from the STANDARD parts box
http://forums.y-blocksforever.com/uploads/images/07a74588-4c51-438d-99e9-0a62.jpg
 

http://forums.y-blocksforever.com/uploads/images/9ea2bf28-00c4-4772-9ac7-d154.jpg 
 Steve Metzger       Tucson, Arizona
ianmatt
Posted 6 Years Ago
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I called napa and they dont list anything for an adjustable vac advance for a 59 f100 292. Any chance you guys can get me a part #? 
ianmatt
Posted 6 Years Ago
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I found this but dont know if adjustable https://www.npdlink.com/store/products/diaphragm_vacuum_advance_replacement-203919-50000.html
ianmatt
Posted 6 Years Ago
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also this one, no mention if adjustable
http://www.lmctruck.com/icatalog/fb/full.aspx?Page=140


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