At that point, you have the variables of horsepower, cubic- inch, and the application down on paper to help figure out what you actually need. I like to use the cubic-inch of the engine as a way to size the carburetor so you know how much CFM (cubic feet per minute) the engine needs to perform. “A lot of people consider horsepower as the best way to size a carburetor, and that method works great. How do you know where to begin in selecting the right size carburetor for your engine? According to Borders, there are two different schools of thought that will make this process easier and ensure you’re on the right track from the start. Since the carburetor isn’t acting efficiently, the problems it presents won’t be related to what you’re trying to solve in the tune. If you don’t have the right size carburetor it can cause a series of problems from the second you try and start tuning. Having the correctly-sized carburetor will make the tuning process much easier. Tip #1: Size Matters - Why You Need A Correctly Sized Carburetor The following are basic tips, but they will help you make the best tuning choices on race day. From there, things get interesting, with numerous adjustments available to influence how the carburetor operates and these will impact how the engine performs.
The basic idea is for the carburetor to introduce air and fuel into the engine while helping it to mix together. We talked with Derrick Borders from Quick Fuel Technology to get some basic tips on how to keep your carburetor tuned-up and running right at the track.Ī carburetor is a simple device that’s full of complex theory in how it functions. Because carburetors are still common fare at dragstrips, it’s a good idea to understand how to tune one.
There are numerous factors that can contribute to your success in drag racing, and one of the biggest is the ability to tune your vehicle to be both fast and consistent.
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