Stromberg Automatic Chokes

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  • February 18, 2017 at 1:50 pm #391974
    Author nameAuthor names are only available to PAS members.

    PASB 2009-3 cites the 13th Edition of Motor’s HANDBOOK (1936) as the source of info on the model 10 Stromberg choke used on Pierce-Arrows.

    I would like a copy of that article. Does anyone have that specific issue of the handbook?

    I would appreciate either an email scan, or a snail-mail hard copy.

    February 18, 2017 at 3:46 pm #404160
    Author nameAuthor names are only available to PAS members.

    I have the 11th edition Motors that covers 1935 through 1947 and has about 1/2 page on adjustments and cutaway of the separate choke for EE-1 and EE-3.

    I could scan and send if helpful.

    Jim

    February 22, 2017 at 11:58 am #413125
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    My 11th edition is the 1948 “Motors Auto Repair Manual” from 1948 – not difficult to get.

    Does someone know if there is a previous series “Motors handbook” that would explain the higher edition number with a 1936 date? I haven’t seen one, but being more contemporary to the years it seems likely to have more information than the 1948.

    Jim

    March 9, 2017 at 5:56 pm #404275
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    Thanks to a lead from J. Chase, I was able to obtain a copy of the 13th edition of Motor’s Handbook, Specifications,Interchangeable Parts, Service Instructions. As I suspected, PASB 2009-3 provides incorrect information for adjusting the Stromberg automatic chokes on PA’s.The correct info is available in PASB 88-5. I will provide a revised article to Arnold Romberg for a future Bulletin article.

    March 9, 2017 at 7:36 pm #404276
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    Thanks Bob! I’ve used the Motor’s instructions with no success over many years. I’ve gone to opening the hood and manually setting at full choke when cold starting. Many other 1936/37 owners have related unresolved choke problems in the past.

    Dave Stevens

    March 10, 2017 at 4:23 pm #404280
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    I’ve heard that the Stromberg chokes were so bad, that they didn’t

    work well when they were new. They’re so inscrutable that someone

    should write a country song about them!

    March 25, 2017 at 10:05 pm #404341
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    I have to open the hood and manually choke my V12 almost every time I start it. Is there a way to set up a manual adjustment that still looks good from the drivers seat . Thanks Doug

    March 26, 2017 at 11:32 am #404342
    Author nameAuthor names are only available to PAS members.

    Doug,

    I know nothing about how the choke on your Stromberg carb works, however I do know how the Stromberg carburetor choke on my Series 80 works.

    Based upon my outdated Stromberg technological understanding relative to your 1933 Stromberg, I offer the following.

    Search eBay for a pull CHOKE assembly (see attached link), mount it under your dash via a piece of fabricated sheet metal and run the stiff steel wire through the firewall (through a rubber grommet) to the choke.

    If you do that, you can adjust the choke from the driver’s seat.

    I trust that this is not too dumb of a suggestion.

    Peter

    http://www.ebay.com/itm/Vintage-Harley-Davidson-Flexible-Steel-Choke-Cable-Assembly-W-C-Clip-/302156432598?hash=item4659ed44d6:g:vlEAAOSw2xRYQ0-j&vxp=mtr

    March 27, 2017 at 10:10 pm #404384
    Author nameAuthor names are only available to PAS members.

    Thanks Peter. I will take a look at this idea. I would like to make it look as unnoticeable as possible. Doug

    March 28, 2017 at 5:19 am #404379
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    Here is a tech sheet on the model 10

    http://restorecarsclassifieds.com/wiki/show_pdf.pdf?n=5454

    http://restorecarsclassifieds.com/wiki/show_pdf.pdf?n=5454

    March 28, 2017 at 10:53 pm #404387
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    Thanks for the tech sheet . I will look and see if it is the same as the one I have. Doug

    March 29, 2017 at 6:20 am #404388
    Author nameAuthor names are only available to PAS members.

    I find that in normal driving weather, my 1936 does not need to be choked to start. After messing with that choke adjustment for forty years, I disconnected the rod from the flapper, and using thin wire, wired the flapper open. I then kept the rod (again with wire) in approximately the right position. Problem solved. Not particularly visible, and I don’t care anyway.

    March 30, 2017 at 12:29 am #404391
    Author nameAuthor names are only available to PAS members.

    Don’t give up on the automatic chokes. After I sorted out the incorrect data noted above, I was able to adjust the chokes for my 1703 and they work properly. Unsure of how they would perform, I built a test stand using a spare carb, a vacuum pump to check the piston operation and a heat gun to warm up the thermostat. They worked consistently on the stand and then on the car. I will share what I learned in the PASB article that I mentioned above.

    PS – The data Bill Lyons cites above is essentially the same as that provided in PASB 88-5; both are correct.

    March 30, 2017 at 9:46 pm #404396
    Author nameAuthor names are only available to PAS members.

    Bob, I’m sure your test bench procedures and choke adjustments will be a very helpful read-thanks ahead of time.

    John

    March 31, 2017 at 10:46 am #404399
    Author nameAuthor names are only available to PAS members.

    Bob, is there any chance you have that test bench still set up? A video with commentary of the proper action of the automatic choke would be VERY educational to all of us. Understanding what it should do, and when would be instrumental for those who are being frustrated by their Bromberg Model 10 chokes.

    Thanks,

    Greg Long

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