dontknowitall Posted August 17, 2010 Report Share Posted August 17, 2010 Ok, I am frustrated! Chasing an advance Vacum control unite for a Fargo - 1950 - Model FN1 with a IAT-4004A Distributor. I Found one on Ebay for sale, but am not sure if the thing will work after all these years.. and spending $70 + postage is not cheap. Can someone explain why I cant use just any vacum advance, do I have to use the one specially made for that distributor? Quote Link to comment Share on other sites More sharing options...
Plymouthy Adams Posted August 17, 2010 Report Share Posted August 17, 2010 (edited) the advance must be able to mount firmly to the distributor housing, the shape and length of the actuating arm is also percise as designed around the size of the distributor housing and the arc in which it is designed to "effect" the points plate, style of connection on the end of the lever must match. Often these levers have angles and offsets that are to prevent hitting the housing internal and also step up an over or go down and between the points plate and the housing cavity..to find a generic would be a bit time involved if you even have success at that.. get this wrong and you can have a miriad of problems of late timing, early timing to little advance too much advance..light throttle ping, binding etc etc.. I believe most here recommend for the smart money of Terrill machine shop who will rebuild your unit with a new diaphram..given the cost of this over possible bad rubber from shelf age of NOS..you may want to bite the bullet and go with a know winner, odds are it will be the most economical way to proceed.. your car will run just fine with the mechanical advance built into the unit while you pull yours off and send it out for rebuild..the vacuum advance on average is about 9-11 degrees above the mechanical limit so to give you a bit of economy when at speed... Edited August 17, 2010 by Tim Adams Quote Link to comment Share on other sites More sharing options...
dontknowitall Posted August 17, 2010 Author Report Share Posted August 17, 2010 Whats the address from Terrill machine shop and would he have a reconditioned one? the advance must be able to mount firmly to the distributor housing, the shape and length of the actuating arm is also percise as designed around the size of the distributor housing and the arc in which it is designed to "effect" the points plate, style of connection on the end of the lever must match. Often these levers have angles and offsets that are to prevent hitting the housing internal and also step up an over or go down and between the points plate and the housing cavity..to find a generic would be a bit time involved if you even have success at that..get this wrong and you can have a miriad of problems of late timing, early timing to little advance too much advance..light throttle ping, binding etc etc.. I believe most here recommend for the smart money of Terrill machine shop who will rebuild your unit with a new diaphram..given the cost of this over possible bad rubber from shelf age of NOS..you may want to bite the bullet and go with a know winner, odds are it will be the most economical way to proceed.. your car will run just fine with the mechanical advance built into the unit while you pull yours off and send it out for rebuild..the vacuum advance on average is about 9-11 degrees above the mechanical limit so to give you a bit of economy when at speed... Quote Link to comment Share on other sites More sharing options...
Aaron Posted August 17, 2010 Report Share Posted August 17, 2010 Terrill Machine 1000 County Rd 454 De Leon TX, 76444 Call and talk to Feltz (254) 893-2610 I just had them rebuild my pot and they did a nice job. $75 bucks plus shipping. Aaron Quote Link to comment Share on other sites More sharing options...
desoto1939 Posted August 18, 2010 Report Share Posted August 18, 2010 the correct VC for your fargo is IAT-2023RF It was used on Dodge 1950-51 Dodge Truck 50-51 Fargo 50-51 Plymouth 50-51 This was taken from an Autolite Electrical book and this was matched up to your distrubtor that you had listed on your post. Rich Hartung Desoto1939@aol.com Quote Link to comment Share on other sites More sharing options...
dontknowitall Posted August 20, 2010 Author Report Share Posted August 20, 2010 Thanks, I did found that out as someone on ebay told me..I think I will send the unit up to usa and get it reconditioned. But thanks for that Rich.. the correct VC for your fargo is IAT-2023RFIt was used on Dodge 1950-51 Dodge Truck 50-51 Fargo 50-51 Plymouth 50-51 This was taken from an Autolite Electrical book and this was matched up to your distrubtor that you had listed on your post. Rich Hartung Desoto1939@aol.com Quote Link to comment Share on other sites More sharing options...
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