Aerospace Cycling

All answers for Motorcycle



What Is A Good Air Fuel Ratio Motorcycle

In theory (and theory only) the perfect ratio is Lambda =1.0. This “perfect” ratio is the ‘Stoichiometric Ratio’ and equates to 14.7:1 A/F. It means there is neither too little, nor too much air.

What is the best AFR for motorcycle?

Typically, four-stroke engines desire a ratio of 12.8:1 to 13.5:1 to produce best power. That’s a little more fuel than stoichiometric, a 14.7:1 ratio, which is the theoretical mixture that consumes all the fuel.

What is a healthy air to fuel ratio?

In a perfect world, all gasoline engines would run the ideal air-fuel mixture of 14.7 parts air to 1 part fuel. This target mixture, which is referred to as the stoichiometric air-fuel ratio, is a compromise between optimum fuel economy and optimum power output.

What air-fuel ratio is too rich?

The ideal ratio, referred to as the stoichiometric ratio, is 14.7 parts air to 1 part fuel. A mixture that has less than 14.7 parts air (for example, a ratio of 12:1) is said to be “rich”.

What is the most efficient fuel ratio?

14.7:1 is perfect for idle and light throttle cruising conditions as it’s the most efficient mixture possible, meaning the best fuel economy and lowest emissions.

Is a Power Commander bad for your bike?

Can a Power Commander damage your bike? It is possible but not likely. A Power Commander gives you the ability to adjust your motorcycle’s air to fuel ratio, which means you could set this so the bike runs too lean. However as the Power Commander can’t send any current to the ECU it is very unlikely it will damage it.

Can you remap motorbikes?

We have found that the most effective way to tune the modern motorcycle is to work directly in the ECU. Our system now allows us to communicate directly to the motorcycles Stock ECU to make adjustments to many of the parameters located in the stock ECU’S such as: Fuel Tables.

What is a bad air fuel ratio?

If the ratio is too rich or too lean, the engine will not burn optimally burn the air-fuel mixture which can cause performance issues or use up too much fuel. The ideal air-fuel ratio that burns all fuel without excess air is 14.7:1. In this case you have 14.7 parts of air for every 1 part of fuel.

How lean is too lean air/fuel ratio?

In a real engine, a 14.7:1 air-fuel ratio is a little too lean. To compensate for incomplete combustion, and to reduce NOx emissions, modern automobiles are tuned to run more rich, sometimes dipping as low as 12:1 or even richer during high-load situations.

Is a higher AFR lean or rich?

When an air/fuel mixture has too much fuel, it is rich. When there is not enough fuel, it is lean. An AFR higher than stoich = lean. An AFR lower than stoich = rich.

How do I know if my motorcycle is running rich?

Typical symptoms of a rich mixture are: Poor fuel economy. Sluggish acceleration. Choke not needed from cold starts. Sooty or black spark plugs. Sooty or black muffler end pipes. Strong smell of gasoline when the machine is at idle. Uneven running (will often slow from regular idle rpms and then stop).

How do you adjust the air fuel mixture on a motorcycle?

Carb Quick Guide Verify carburetor is set to stock settings: Start bike, bring to operating temperature. Set idle speed adjusting screw, clockwise to increase rpm, counter-clockwise to decrease rpm. Adjust idle mixture by turning idle mixture screw slowly clockwise until the engine runs poorly.

Will running rich hurt my engine?

Running rich is not good for the engine as it builds up carbon deposits on valves and pistons that destroy the engines performance. Running rich is typical for cold start ups, but quickly ceases once the oxygen sensors warm up because the engine closes the fuel loop and burns fuel to air in the right proportions.

What causes bad air fuel ratio?

Problems with air fuel ratio sensors are common. Often a sensor gets contaminated or simply fails. In some cars, the heating element inside the sensor fails causing the malfunction.

What should air fuel ratio be under boost?

under boost you dont want more than 12.5:1 afr. 14.7 is stoich and thats the target afr under vacuum and 0 manifold pressure.

How does air fuel ratio affect engine performance?

An excessively high air–fuel ratio may produce high pumping loss, high peak cylinder pressure, and high compressor outlet temperature. An excessively low air–fuel ratio may produce the problems of deteriorated combustion efficiency, high smoke, and high exhaust gas temperature.

How much HP will a power commander add?

The Power Commander is a tuning tool to adjust fuel, and on some models ignition timing. Just adding a Power Commander to a completely stock vehicle usually does not increase peak horsepower. It usually will improve drivability, throttle response, and mid-range horsepower and torque.

How much does it cost to dyno tune a motorcycle?

Given the price of the equipment and specialized training required to interpret the results, dyno tuning isn’t cheap, so expect to pay between $300-$700 to get your bike sorted.

Should I flash my motorcycle ECU?

Essentially, flashing or tuning your engine control unit is a remapping of the settings within the software. The same way your technology will work faster and more smoothly when taken care of in this way, your motorcycle will run at more optimal performance when you flash the ECU.

Does remapping damage your engine?

Some people are concerned that engine remapping could cause problems with their car. But it shouldn’t affect reliability if you use a reputable company. Remapping does put extra strain on an engine, but not a dangerous amount if it’s done properly.

Does ECU remapping damage your bike?

The warranty is of the remap, that it won’t harm the engine or any other components of the bike. But if done under right supervision and with a right goal in mind, an ECU remap can bring goodies like improved performance and even fuel efficiency.