What is compression ratio and cut-off ratio?
The results shows that if compression ratio is less than certain value, the net work output first decreases and then starts to increase as the cut-off ratio increases. While if compression ratio exceeds certain value, the increase of cut-off ratio make the net work output bigger.
What is cut-off ratio in IC engine?
9-53C Cutoff ratio is the ratio of the cylinder volumes after and before the combustion process. As the cutoff ratio decreases, the efficiency of the diesel cycle increases.
What does compression ratio mean?
The compression ratio (CR) is defined as the ratio of the volume of the cylinder and its head space (including the pre-combustion chamber, if present) when the piston is at the bottom of its stroke to the volume of the head space when the piston is at the top of its travel (‘top dead centre’, tdc).
What is the highest compression ratio for 98 octane?
| Fuel | RON Typical | Highest useful compression ratio * |
|---|---|---|
| BP Ultimate | 98 | 9.5-10 |
| BP 100 Racing Fuel | 110 | 11.5-13 |
| BP Methanol Racing Fuel | 115 | 15-17 |
| Toluene | 124 | 13-15 |
What does 98 RON mean?
Research Octane Number
Can you mix 95 98?
Mixing 95 & 98 is fine, no need to run the tank near empty. As for performance, for the car in question I don’t think it would give any more noticeable power gain than you would get going to the toilet and emptying your bowels beforehand for a little weight saving! It’s the best story that ACA has ever run.
What octane do you use for 10 1 compression?
Most stock gas engines have a compression ratio around 10:1 and run just fine on regular 87-octane gas.
What is the highest compression ratio for 87 octane?
8.7:1
What is the compression ratio for 100 octane?
12 to 1
What is the maximum compression ratio for pump gas?
about 8:1
What is the compression ratio for 110 octane?
about 13:1
Can I use 110 octane?
High octane race fuel is sort of the same way. So, the moral of the story is; unless you have at least 12:1 compression (of more), do not run any 110 octane or higher race gas in it or you’ll go slower.
Can higher octane hurt your engine?
The higher octane gives premium gas greater resistance to early fuel ignition, which can result in potential damage, sometimes accompanied by audible engine knocking or pinging. If you use premium fuel because your engine knocks on regular, you are treating the symptom, not the cause.
What happens if you put 93 instead of 87?
If you usually fill your tank up with 87-octane gasoline and you accidentally put in a higher octane blend (say, 91, 92, or 93), don’t worry. You may feel a difference in the way the vehicle runs and may notice an improvement in gas mileage, but that’s about all that will happen.
How much HP does 93 octane add?
Power at the wheels dropped from 380 to 360 horsepower with the change from 93 to 87 octane. That difference seemed to grow, and we could even feel it from the driver’s seat at the test track.
Can I put 100 octane in my car?
Any gasoline fueled normal car can run on 100 octane fuel. It won’t produce any more power, or get better mileage. Won’t burn cleaner or with less pollution.
Does 100 octane increase horsepower?
Octane does not offer any better fuel mileage, increase engine horsepower, or make the engine start quicker. Higher octane only reduces the likelihood of engine knock or ping. Because higher octane gas burns slower, it is more resistant to knock when subjected to higher RPM and cylinder pressures.
Does higher octane gas make an engine run cooler?
Registered. higher octane gas will make your engine run cooler. temperature does not ignite it, spark does.
Can you put racing fuel in a normal car?
You can put some racing fuels in normal cars, but there is no real reason for you to do this. These fuels have higher octane ratings, so are designed to perform at higher temperatures and pressures. However, it is not going to end up damaging your car too much if you do.
Will racing fuel clean injectors?
VP Racing Fuels has applied over 45 years of fuel formulation experience to create several additives that clean injectors and the entire fuel system. VP’s Fuel System Cleaner with RP21 cleans the entire fuel system for up to 5,000 miles.
Can you run a normal car on nitromethane?
There’s no valid reason to try and run straight Nitro in a regular engine that was designed for regular fuel… Engines that run on nitromethane are in the extreme performance category. They are used for racing, and not much else. They are run extremely hard for a short period of time.
Does adding alcohol to gas increase horsepower?
High-octane fuels, like ethanol, help deliver more horsepower and speed. Commonly used octane boosters increase the cost of premium 93 octane fuel as much as 30 percent relative to regular 87 octane fuel; however, increasing fuel octane with ethanol actually decreases the cost of the fuel.