Tip #2: Setting The Correct Fuel Pressure. After ensuring the carburetor you’ve selected is the right size, making sure you have the correct fuel pressure is also a critical step in the tuning process. For a gas application, it’s best to have about 6.5-pounds of regulated fuel pressure going into the carburetor. Engine tuning involves making modifications to the engine’s components and settings to enhance its performance. This can include adjusting the air-fuel ratio, ignition timing, and optimizing the engine management system to achieve desired results like increased power output or improved fuel efficiency. 4. When we talk about an air fuel ratio such as 12.5 to one what we mean is that we're adding one part of fuel for every 12.5 parts of air. 00:44: The way we measure the air and fuel is by mass, and we could use units of pounds, kilograms or grams, it doesn't really matter. 00:52: Every fuel has a specific ratio known as the Stoichiometric ratio The AEM X-WIFI wirelessly streaming air/fuel and EGT data directly from our iPhone, though the X-WIFI will work with any phone that can connect to a network with internet capability. The X-WIFI is supplied with a Bosch oxygen sensor, exhaust bung, sensor cable, control module, data cable and wiring supplies. Typically air/fuel ratios will hover Each jet size flows about 2.5% difference. A well tuned carbureted engine should run 15.5 to 16 AFR on the highway no problem. While 14.7 or "stoich" is theoretically perfect leaner mixtures are used for best highway (low load) economy. Under load/power far richer fuel mixtures are required. Theoretically, the ideal stoichiometric A/F mixture (the chemically ideal mixture of air and fuel that is required to provide a complete burn) for a properly tuned engine running on pure gasoline is 14.7:1; that is, 14.7 lbs. of air to 1 lb. of fuel. However, because of operating losses in the induction system due to intake runner and cylinder What they really detect is the ratio of oxygen to ideal oxygen for a stoichiometric combustion (the 9.8 AFR for E85 or 14.7 AFR for a typical E0 fuel). So if your AFR is set for Gasoline, it should read close to 14.7 AFR even if you are using E85 that is really 9.8. Think of it as 14.7 Gasoline AFR. For cars tuned for flex fuel, typically folks Take your motorcycle to a whole new level of performance with Dynojet’s Power Vision 3. With a wide variety of tunes to choose from and upgraded monitoring capabilities to keep you in sync, you’ll be in total control for any adventure. Tap into more horsepower to the ground (WHP) than stock and optimized performance for the ultimate ride. cqVt.