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By ianmatt - 8 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
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By GREENBIRD56 - 8 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.
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By oldcarmark - 8 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.
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By ianmatt - 8 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
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By GREENBIRD56 - 8 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.
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By ianmatt - 8 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.
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By GREENBIRD56 - 8 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
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By ianmatt - 8 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 #?
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By ianmatt - 8 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
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By ianmatt - 8 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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By GREENBIRD56 - 8 Years Ago
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Ian - I think Mark and I have the later edition Motorcraft point plate (and mine is actually an electronic Duraspark II version). The replacement vacuum control parts we are referencing are made by a company named "STANDARD MOTOR PRODUCTS" - and the one I've got on the T-bird is a "VC-223". The operating linkage extending into the distributor is a formed flat - not a wire rod.
Have you come across a replacement that looks like this? It can be disassembled and re-shimmed.
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By oldcarmark - 8 Years Ago
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If You want to have a look at VC-223 and see if it is what will work on your Distributor there are all Kinds on Ebay.
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By ianmatt - 8 Years Ago
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Awesome you guys thanks so much. I will see if I can get one. I'll keep you posted. thanks a million
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