You've also probably noticed that the same four 48 IDA setup is used on 289 Ford engines, as on the Cobras, for instance, You may have wondered how the same carburetor setup could work on two such vastly different engines. Some where along the line, you can probably recall seeing four 48 IDA's on a big, nasty rat motor. It's all pretty simple.So, the next time someone mentions he's running Weber's, ask him whether he's running DCOE's or IDA's and pick up a few bench-racing pointers. So you see, all those numbers and letters really mean something. Then there are the sidedrafts - all Weber sidedraft carburetors carry the suffix DCOE, their prefix numbers (sizes) ranging from 38 mm all the way to 55 mm (that's close to 2 1/4"). As the prefix numbers indicate, they are available with bore diameters of 40, 42 and 44 mm. The 40, 42 and 44 DCNF's are compact twin-throats which feature a cold-start. The 3C means this one's a "3-choke" (the in-line three barrel). Again, a high performance downdraft, available in 40 and 46 mm sizes. It tells us the carburetor has a bore diameter and throttle plate size of 48 millimeters (about 1 15/16"), while the IDA suffix tells us that it is a high performance downdraft carburetor. In this case, the number 48 indicates the carburetor's size. The most well-known is the good-old "48 IDA", a masterpiece of design and a marvel of precision machining that has been around since the early 60's with only minor revisions. Welcome to the Big Time!Īll Weber carburetors carry a basic model number which is stamped at the base of the carburetor on its mounting flange. This carburetor was intended for serious tuners and performance enthusiasts who want the most that their engine can give them. There is no such thing as taking four of these out of their boxes and bolting them on to an intake simply isn't done that way. The Weber carburetor was designed to be totally adaptable to any size engine, for any purpose, at any altitude. It's what "tuned induction" is all about! If it is not tuned properly, that instrument will never make beautiful music for you-no matter what! And therein, lies the secret of making beautiful music with Weber carburetors-initial preparation. Now, if you're one of those people who has always had trouble accepting the idea that the Weber is a terrific street carburetor, consider it this way: Weber carburetion is like an expensive musical instrument. You can even change its CFM to suit your needs, which should begin to explain the Weber's superior adaptability for all kinds of applications. It is produced in a wide variety of styles which incorporate different features, enabling the user to select exactly the right design and size for the intended use. But why Weber?įor starters, it's a modular carburetor design. The world's most beautiful, exotic and most powerful engines have traditionally been fed through Weber carburetors. Maybe you've been lucky enough to get a ride in a Ferrari or a Weber carburetor 289 Cobra if you have, chances are, it's a ride you've never forgotten! Weber-carburetor engines all have one thing in common: they assault the senses with a rush of torque and a brutal sense of urgency that is generally unmatched among carbureted engines (and they have a sound all their own.go to a Shelby American convention on Open Track day and you can pick out the Weber-carbureted Cobras just by their sound there is no mistaking it!). Weber carburetors have been seen as standard equipment on the finest racing and street machinery to come out of Europe for over three decades. "If you have always wanted to know what makes these carburetors so special, here's a basic, easy-to-understand introduction to the world of Weber exotica." I cut and pasted this Articale on Weber Carbs.
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