Carburetor Applications

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Carburetion is a very complex subject, and any discussion here can only deal with generalities. It is also an important subject, since performance, economy, and smoothness are all very much affected by carburetion.Get more news about Carburetor For Mazda,you can vist our website!

Stock Carburetors
The stock carburetors on early Mazda rotaries are excellent parts, well designed and well built. The only problem is that, for most performance work, they were too small. This shortcoming could be partly offset by increasing the size of the venturis; however, other problems arose in lower RPM street use, such as poor mixture, spark plug fouling, poor throttle response, and poor mileage. However, even though it was possible to improve power using the stock carburetor, replacement parts for these applications are no longer available

Regarding the emission controls that are installed on and around the carburetor: In our experience, the only reason for removing them is simplicity, and the reliability this simplification offers. Neither the valves nor the air pump, if operating properly, has a significant effect on mileage or performance. Many of these parts operate only on deceleration or when the engine is shut off. If you decide that, for simplicity, you wish to remove the air valves and the air pump, we recommend the following:

On 1975 and earlier 12A engines, either replace the stock air nozzles with blocking nozzles or cut off the top .125-inch of the stock air nozzles, weld the end shut, and re-install them. On all models, retain the fuel tank vent hose (on most models, it enters the top of the air cleaner) as well as some form of crankcase breather from either the air/oil separator (located on the oil filler neck) or the short tube just below it on the intermediate housing. Other than this, just cap off, cover, or block any other openings you uncover. We offer various blocking plates to cover the opening that remains in the stock intake manifold when the Air Control and Check Valve unit is removed.

Replacement Carburetors - Holley
For certain applications, our Racing Beat-modified Holley Intake Systems are a very popular choice. These "streetable" intake systems have been developed and tuned by Racing Beat as a complete kit and include a Racing Beat-modified Holley carb, and complete installation instructions and mounting hardware. The Holley 465 CFM carbureter that we use in several of our systems feature a temperature activated choke for improved cold weather starting performance.

Each Racing Beat kit has been tuned for a very specific engine application, and should only be used for that recommended engine. Each Holley carburetor that we offer is completely disassembled, various components machined, jets retuned, and then reassembled. Attempting to use a kit on another engine application might be possible, but you would need to undertake your own research and retune the carburetor for this application.