What affects engine efficiency?

What affects engine efficiency?

The efficiency of internal combustion engines depends on several factors, the most important of which is the expansion ratio. For any heat engine the work which can be extracted from it is proportional to the difference between the starting pressure and the ending pressure during the expansion phase.

Why are 2 stroke exhausts big?

That bulge is called an expansion chamber, and it is used to increase the horsepower of the engine (see this page for a photo). This technique only works on two-stroke engines, which is why you see it on a lot of dirt bikes but not on street bikes. Most street bikes use four-stroke engines.

Why are two stroke engines more powerful?

Because combustion takes place with each revolution of the crankshaft with a 2-stroke, this format puts out more power than a 4-stroke engine and the power has more instantaneous delivery. This are some reasons why 2-stroke engines have a long history of use on many different types of motorcycles.

Why is a 4-stroke engine more efficient than a 2 stroke engine?

2 stroke engine produces more mechanical power compare to four stroke. In fuel efficiency it’s entirely opposite. Four stroke is more fuel efficient than two stroke because 2 stroke engine doesn’t burn entire fuel. 2s there is 1 power stroke in every revolution of crankshaft so more fuel is burnt.

What are the disadvantages of two stroke engine?

Disadvantages of two stroke engines

• Two stroke engines do not last as long as four stroke engines; there is no lubrication system in a two stroke engine so parts wear out a lot faster.
• Two stroke oil is expensive; you would burn a gallon every 1000 miles if it were in a car.
• Two stroke engines use more fuel.

How can I make my 2 stroke more powerful?

How to make a 2 stroke more powerful

1. Consider reed valve for more horsepower.
2. Reduce the Squish gap.
3. Down jet the engine.
4. Inspect your exhaust system.
5. Work on your intake.
6. Get the cylinder ported.
7. Check the Ignition timing.
8. Make your exhaust system stinger ID smaller.

Are 2 stroke faster than 4 stroke outboards?

Two-strokes tend to weigh less but can accelerate faster. Four-strokes tend to be quieter and have more torque than two-stroke outboards.

Can you supercharge a 2 stroke?

It is considered not possible to turbo-supercharge a two stroke because of the conflict with the tuned exhaust. It is considered possible to mechanically supercharge a two stroke.

Is it bad to run a 2 stroke rich?

Can Running Rich Damage The Engine? Running rich will very rarely damage an engine. However, running too rich for too long can cause problems long-term that will affect performance and reliability. Rich jetting will foul a spark plug more easily.

What happens if 2 stroke mix is wrong?

Excess oil can produce a smoky exhaust, oil leaking out of the muffler, and sometimes loss of power. While not ideal, these issues can be fixed by simply replacing the fuel in the tank with properly mixed fuel. But running a two-cycle engine with too little oil can actually destroy the unit.

What should fuel trim be at idle?

Note though that since sudden changes in the engine speed can cause short-term fuel trim values to fluctuate wildly, all fuel trim values should be taken at a minimum of at least three steady engine speeds, these being at idle, at about 2500 RPM, and at about 3500 RPM.

What causes positive fuel trim at idle?

If the engine uses a mass airflow sensor (MAF), high fuel trims at idle are a classic symptom of a vacuum leak, especially if LTFT decreases at higher engine speeds. A dirty or faulty MAF sensor can also cause positive fuel trim numbers because it “under-reports” airflow, driving the base air/fuel calculation lean.

How can you tell Bank 1 and Bank 2?

Bank 1 and bank 2 simply refer to either side of the engine. Check your owner’s manual or a service manual for a positive location of bank 1 and bank 2. Most commonly, bank 1 houses the front most cylinder on the engine cylinder 1, and bank 2 is the opposite side of the engine.

Is Bank 1 right or left?

Since Bank 1 is the rear one toward the firewall and has the sensors labeled RH it must be considered the right side of the engine. Conversely Bank 2 is toward the radiator, the front of the vehicle, and has the sensors labeled LH, that makes it the left side of the engine.

What side is bank 1 sensor 2?

Bank 1 Sensor 1 = This O2 sensor is located right before the catalytic converter, on the side with the Cylinder #1 that is Bank 1. Bank 1 Sensor 2 = This O2 sensor is located right after the catalytic converter, on the side with the Cylinder #1 that is Bank 1.

Is Bank 1 driver or passenger side?

Bank 1 is driver side, yes.