Re: [Classic Mustang] 2100 2BBL Carburetor Question ???

I don't know what these 'venturi' numbers mean, John.   I could hazard a guess, but any correlation to reality would be purely coincidental. 

It would be interesting... if there was some correlation to with the DSO.  Different regions of the country would have different average elevations... I suppose it might have some effect on average performance for a given area. 

Then again, it could be a running change... in model numbers... or simply something do with the internal jet size pairing.  I don't know. 

One thing I do know, it won't affect your rebuilding of the carburetor.   The parts that you can replace will be in the kid.  Things like fuel pump valve, float needle seat, gaskets, etc.  Some things you won't be able to change out are the linkages or pivot for the butterfly valves.    If the pivot is worn so much that it leaks vacuum (significantly) then even your rebuild kit won't be sufficient to do the job.  (It happens... rarely, but it happens.)

The kit is cheap - so give it a go.  Chances are you're not going to ruin anything by disassembly.  Just keep things _very_ clean.  I like to use Berryman's B-12 Chemtool to do the job of removing varnish and gunk from the passages.  The liquid stuff will work fine for soaking larger pieces, and the spray stuff will do the job of clearing out all the passages. You won't need any gasket sealer or anything like that.  Just make sure you don't score the mating surfaces while taking things apart (or removing old gasket materials.)  Just take your time and you'll do fine.

best-
Michael

John Soto wrote:

Thanks guys for your reply, but I need help with the following: Upon my research, I found venturi numbers of: 1.08, 1.14, 1.21, 1.23, 1.33 there might be others. I am thinking of getting another 2100 carburetor to "experiment on" and get the feel of rebuilding before actually working on my carburetor. I am sure that these venturi numbers mean something, but I don't know what they are. If I use another number besides my 1.14, will it make a difference on performance to my 289 engine ? I am really a "newbe" to this, so pardon my question if this sounds silly.... Thanks again, John --- On Sat, 12/27/08, Michael D. Myjak <mmyjak@virtualworkshop.com> wrote: From: Michael D. Myjak <mmyjak@virtualworkshop.com> Subject: Re: [Classic Mustang] 2100 2BBL Carburetor Question ??? To: classicmustang@yahoogroups.com Date: Saturday, December 27, 2008, 10:33 AM I would add... that if you want to know the original settings of the idle screws... don't rely on counting the number of turns to remove them.  Rather count the number to turns to seat them.  The final carb idle adjustment will be similar, but may not be identical due to your cleaning and parts replacement service.  BTW -- this original setting it only gives you an indication of a starting point after the rebuild.  If memory serves, the factory manual stipulates that you seat the needle valves (gently) and then back them out 1 full turn.  From there, you work each in and out to find an optimal idle set point. cheers! -Michael stan wrote: Not sure if it is the same carb or not, but I have 2 spare 2 barrel carbs off my 69 351W engine if anyone needs one cheap.    Before you open your carb kit, compare the part number to the tag that is on your carb to make sure it is the right one.  The carb kit should contain general instructions and diagrams on the rebuild of the carbs.  Look at the parts in the kit, so you know which ones get replaced.  All others need to be cleaned.  when you back out the two adjustment screws for mixture, be sure to count the number of turns "out" so that you will reinstall them to the same setting initially.   Follow the diagrams as you take it apart, and place parts on a towel nearby to keep them in the order of disassembly.  After thoroughly cleaning the carb, then start the reassembly step-by-step. Be sure not to over-tighten any of the screws. Most production rebuild shops have a flow meter to make the final adjustment, but you can do it once you get it back on the car. --- On Sat, 12/27/08, John <gmrs675@yahoo. com> wrote: From: John <gmrs675@yahoo. com> Subject: [Classic Mustang] 2100 2BBL Carburetor Question ??? To: classicmustang@ yahoogroups. com Date: Saturday, December 27, 2008, 2:03 AM I have a 2100 2bbl. carburetor stamped 1.14 from my 1968 mustang coupe, 289 engine, automatic C4, single exhaust. The carburetor needs a rebuild and I have the kit for it. This will be my first experience with this. Upon my research, I found venturi numbers of: 1.08, 1.14, 1.21, 1.23, 1.33 there might be others. I am thinking of getting another 2100 carburetor to "experiment on" and get the feel of rebuilding before actually working on my carburetor. I am sure that these venturi numbers mean something, but I don't know what they are. If I use another number besides my 1.14, will it make a difference on performance to my 289 engine ? I am really a "newbe" to this, so pardon my question if this sounds silly.... John 68 Mustang __

 

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