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commander Dave

bb1-d carburator

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I remember some time back of talk about the bb1 carburetor. Are there any experts who think my bb1-d carburetor might be to small for my 1927 Commander "Big 6" 354 cid engine?

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Do you have the ID tag still attached so you have an idea how it was configured from the factory?  That is a good place to start.  If you have the tag, you can lok that tag information up on several internet locations and it will suggest what the application would have been.  You can then decide how close your application is the factory application.  If you don't have a tag, it is going to be a guess unless you take it apart, measure the components and then determine if it has the dynamics to fit the need of your 354 CID engine.

Al

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Your best bet would be to consult The Carb King. He might be able to help you. 

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Carbking read the thread, but did not answer, as the thread asked for experts, and carbking is a specialist, not an expert.

 

Experts write sports columns, and when their prediction does not come to pass, the game result is labeled an "upset"! ;)

 

But since my bell has been rung (twice), my opinion is the BB1D is WAAAAAAAAAAAAAAAAAAAY too small!

 

Carter released three sizes of the BB1 updraft carburetor. The BB1D is the middle size.

 

The largest engine Carter suggesting using the largest BB1 on is 315 CID. The BB1D works really well on older engines around 215~250 CID. On newer engines, with more RPM, about 225 would be the upper limit.

 

Jon.

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Thank you carb king! Now I have to figure out what carb might be best without breaking my bank account.

I kinda thought that might be the case because she wanted to go but couldn't get enough juice.

 Respectfully ; Commander Dave

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December 7, 2018.
Series 12 and 13 new replacement Zenith updraft carburetors.

Designed to replace the original potmetal Stromberg T-2 on all Series 12A and B, and all potmetal T-2, U-2 used to mid production Series 13. After many decades the original potmetal carbs are cracking and becoming unsafe to use as a result of intergranular corrosion. The potmetal used in the 1920's and early 1930's is porous. It is slowly corroding from within and expanding/cracking. 

These are new manufacture, diecast updraft carburetors have the correct size venturi and jetting for all Franklin Series 12A, B, and Series 130. Plus a model is available for the larger Series 135/137 engines. 

Features

  • Bench set and ready to bolt-on updraft that uses all the original hand and foot controls.
  • Simple and decades-proven design.
  • Original air filter fits right on.
  • Adjustable idle speed, idle air/fuel mix, and high speed fuel jet, that work the same as the tuning procedures covered in the Franklin Operator’s Manuals.
  • Fuel-proof rubber tipped float needle for leak-free sealing when the engine is shutoff.
  • Same 1/8 inch pipe thread as original fuel line inlet fitting.
  • Vacuum controlled accelerator and power enrichment circuits.
  • Dust seals an throttle and choke butterfly shafts.
  • Comes with new mounting gasket, nuts, and lock washers.


Note, these are not stationary/industrial engine carburetors, like many that are turning up installed as replacements in the past. With these there is no need to over-adjust the main jet too-rich for cruising conditions so as to compensate for being too-lean during acceleration and hill climbing because previous replacement types lacked those fuel circuits. These are specifically designed and sized with all the correct fuel circuits needed to smoothly handle all Franklin driving conditions with the proper air/fuel ratios. 

For more info contact,
Paul Fitzpatrick
see: PFitz below

Parts

Parts

Edited by John_Mereness (see edit history)

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Thanks John, but please edit out the contact info.  No need to help scammers calling or emailing. That info was in the Members Only part of the club website for a good reason. 

 

Paul

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Thanks, John. When I first ran ads for making flexible driveshaft and generator/water pump drive discs, I included my email and got barraged with scammers. 

 

Unfortunately, I don't have any automotive updraft carbs big enough for the OP's 354 CID. The new updraft carbs I can get are all models designed for the  200 to 300 CID range of engines sizes.

 

Paul 

Edited by PFitz (see edit history)

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