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DCOE                                                                   DGV                                                           COMPLETE KIT

    Weber carburetors are the ultimate induction system for street or track. These precision built units have earned their sterling reputation from countless successes in international competition over the past four decades. Weber carbs provide a near infinite range of adjustments to ensure the correct fuel/air mixture during all operating conditions. All of the jets, chokes, and emulsion tubes can be replaced with those of other sizes. In fact, the entire carburetor can be disassembled without removing it from the manifold!

    Let's compare Weber to their imitators. Although many Weber patents have expired, allowing other manufacturers to copy the design, Weber excels in one very important area - precision and accuracy. The very close tolerances found in Weber carbs ensure operating perfection and maximum horsepower over the entire RPM range. This is the reason that Weber carbs are used throughout the world on racing engines and the finest production cars, such as Porsche, Ferrari, Maserati, Alfa Romeo, Lamborghini, and Lotus.

JETTING & SPARE PARTS: Weber carburetors are supplied from the factory with jetting arrived at through dyno testing for maximum horsepower. Sometimes, especially with the DCOE series, the jetting is too large for street applications. Often, a simple change of choke tubes is all that is required to correct this. If you ever need technical assistance with jetting, just give us a call. The Haynes Weber Manual is particularly helpful in tuning these carburetors. Once tuned, no further adjustments are required. This is the beauty of the Weber carbs. They hold their settings because you replace jets - not turn screws. Once you've got it right, that's it!

WHICH TYPE OF WEBER ? From a performance standpoint, the side draft DCOE carbs are normally much better than the down draft DGV versions. This is especially true if the inlet ports on the head open to the side so that the intake passage has a direct route into the combustion chamber. The side drafts offer better throttle response and have a much greater potential for tuning than the down drafts. The DCOE is primarily for high performance and you will see a lot of them on race cars. With smaller jetting, they are also excellent on the street. The DCOE provides ideal mixture control throughout the rpm range, resulting in fantastic acceleration.

    The 32/36 DGV series is pretty simple and there is not a whole lot that can be changed in them. You can replace the main jets, idle jets, and air correction jets with those of different sizes, and that's about it. The DCOE side draft carbs are more versatile. In addition to the parts mentioned above, you can also install different size choke tubes, emulsion tubes, auxiliary venturis, pump jets, inlet valves, and many more. The tuning is more exacting, but the performance potential is much greater.

    Actually, with either type Weber, you can take them out of the box, install them, crank up the engine, and drive away. The fine tuning comes in when you get ready to tune them "right-on-the-money" and get that last little bit of power. The sidedraft DCOE's have a lot of tuning leeway and versatility that the DGV's just don't allow. However, for ease of tuning, the DGV carb is the winner.

THE BEST FOR YOUR CAR In terms of installation, the down drafts are usually easier to install on cars that were originally equipped with some form of down draft carburetor. In fact, they often use the same intake manifold, and only an adapter is required to convert from the stock carb to the Weber. This saves money and installation time. Conversely, if the car was originally equipped with side-draft carbs, then a side-draft Weber is probably your best bet for performance and cost. If performance is of utmost consideration, then go with the side draft carbs, particularly on cars with the intake ports on the side. We recommend these carbs for hot street use and for racing applications.

    Keep in mind, however, that there is a great deal of variation in the conversions from one make of car to another. The best idea is to talk with someone who knows about both types on your particular make. If in doubt, call us! Either way, a sidedraft or a downdraft conversion will make a significant improvement in your car's performance and give you thousands of maintenance-free miles.

Weber Dir.