rwchatham Posted July 23 Share Posted July 23 (edited) I have an all original 1927 packard that idles nicely and runs well up to 3/4 throttle . At full throttle it starts to pop and breakup . Timing position doesn’t seem to affect it so im thinking its not getting enough fuel at full throttle . Any experienced guys with this 2 soring carburetor adjustment ? Should I adjust the inner spring or the outer ? Also the diaphragm under the springs with the car off is slightly below all the way up ? Should this diaphragm be all the way up when off ? Thanks Edited July 23 by rwchatham (see edit history) Link to comment Share on other sites More sharing options...
pmhowe Posted July 23 Share Posted July 23 Hi R W Chatham, I’m no expert on this carburetor, although I have a 1928 model with a similar carb. The attached instruction from Dyke’s carburetor supplement (1940) should help. Your attention is called to the paragraph on the second page, right hand side; “To check, proceed as follows”. Good luck. Please post how you make out. 1 1 Link to comment Share on other sites More sharing options...
rwchatham Posted July 23 Author Share Posted July 23 Thank you , that should definitely help me better understand how it works . 1 Link to comment Share on other sites More sharing options...
rwchatham Posted July 23 Author Share Posted July 23 Phil is it possible to get a clearer photo of the pages ? It is printing out kind of blurry for some reason. Thanks Link to comment Share on other sites More sharing options...
carbking Posted July 23 Share Posted July 23 (edited) I had the same problem in reading; the dimension mentioned between the two springs is 5/32 inch. Jon Edited July 23 by carbking (see edit history) Link to comment Share on other sites More sharing options...
rwchatham Posted July 23 Author Share Posted July 23 39 minutes ago, carbking said: I had the same problem in reading; the dimension mentioned between the two springs is 5/32 inch. Jon Jon can you read it clear enough to see if the diaphragm should be all the way up with the car not running ? Link to comment Share on other sites More sharing options...
carbking Posted July 23 Share Posted July 23 Yes, and yes. Jon Link to comment Share on other sites More sharing options...
pmhowe Posted July 23 Share Posted July 23 (edited) My scanner produces a pdf file as the default. The AACA forum does not allow me to post pdf files. I chose to convert them to jpeg files, which are acceptable to the forum. The pdf file is very readable and clear and - better for me - can be zoomed to a very large size. Nice and readable to these old eyeballs and very clear. If you can tell me an AACA-acceptable file format that is better, I will repost. I tried to send the pdf file by PM to RWC and CarbKing, but pdf format is not allowed there, either. So if you will send me a PM and provide your email address, I will happily send you the info in pdf format. Maybe the AACA web administrator could set it up so that pdf files are allowed in the future? Phil Edited July 23 by pmhowe (see edit history) 1 Link to comment Share on other sites More sharing options...
carbking Posted July 23 Share Posted July 23 I have a better reference, but it also is a PDF. But I haven't found it yet. Did find the original. Phil, it is a pain in a part of the anatomy, but you can display the PDF, take a picture with your cell phone, and then post the pictures. Jon Link to comment Share on other sites More sharing options...
rwchatham Posted July 24 Author Share Posted July 24 20 minutes ago, carbking said: I have a better reference, but it also is a PDF. But I haven't found it yet. Did find the original. Phil, it is a pain in a part of the anatomy, but you can display the PDF, take a picture with your cell phone, and then post the pictures. Jon Jon I sent you a pm with my email perhaps you can send it to me there ? Thank you Link to comment Share on other sites More sharing options...
DFeeney Posted July 24 Share Posted July 24 I have found in my experience that if you know how something works , you have a good chance of fixing it. Link to comment Share on other sites More sharing options...
carbking Posted July 24 Share Posted July 24 10 hours ago, rwchatham said: Jon I sent you a pm with my email perhaps you can send it to me there ? Thank you Got your PM, but have not found the digital copy of my Radco book. Jon Link to comment Share on other sites More sharing options...
rwchatham Posted July 24 Author Share Posted July 24 10 hours ago, DFeeney said: I have found in my experience that if you know how something works , you have a good chance of fixing it. You are correct thats why I am trying to get a better understanding of how and when the springs operate before I just start turning screws without understanding of what they actually do . Thanks Link to comment Share on other sites More sharing options...
carbking Posted July 25 Share Posted July 25 (edited) Found my digital copy! But since I still have the original, easier to rescan to a format this website will accept than do the coversion! Moderators and webmasters: PLEASE consider upgrading this website to accept Adobe PDF files, which as far as I am aware, has been the industry standard for several decades! Jon In any event, pictures below: Edited July 25 by carbking (see edit history) Link to comment Share on other sites More sharing options...
carbking Posted July 25 Share Posted July 25 Note the above information covers both types of Detroit Lubricator carburetors: the model 51, and the earlier "Packard" carburetor, also made by Detroit Lubricator, and the Johnson carburetors. The Johnson information at least makes for interesting reading. I started working on carburetors in 1959, and in that time I can count the number of servicable Packard Johnsons that I have personally seen on the toes of my left hand! Jon 1 Link to comment Share on other sites More sharing options...
60FlatTop Posted July 25 Share Posted July 25 Reminds me of a story. Phil had a Packard Twin Six that never ran quite right, seemed to lack power. Ed was a pretty well experienced carburetor man. One day Ed drove out to Phil's house and they thoroughly attacked the carburetor issues. Phil was amazed at the results. They took the car out on the nearby country highway and the car went like never before. They arrived back at the garage with the big tourer top tied back, partially in place after the leather straps holding the top above the windshield gave up at speed. Be sure to "check your leather". 1 1 Link to comment Share on other sites More sharing options...
pmhowe Posted July 25 Share Posted July 25 CarbKing, Many thanks for posting that. Good information on Detroit Lubricator carburetors is fairly rare. Thanks again. Link to comment Share on other sites More sharing options...
rwchatham Posted July 25 Author Share Posted July 25 Thanks to phil and jon you guys have been a great help . Link to comment Share on other sites More sharing options...
rwchatham Posted July 25 Author Share Posted July 25 6 hours ago, 60FlatTop said: Reminds me of a story. Phil had a Packard Twin Six that never ran quite right, seemed to lack power. Ed was a pretty well experienced carburetor man. One day Ed drove out to Phil's house and they thoroughly attacked the carburetor issues. Phil was amazed at the results. They took the car out on the nearby country highway and the car went like never before. They arrived back at the garage with the big tourer top tied back, partially in place after the leather straps holding the top above the windshield gave up at speed. Be sure to "check your leather". Maybe I need Ed !!! 1 Link to comment Share on other sites More sharing options...
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