How do you calculate the compression ratio of a diesel engine?
Plug your numbers into the formula CR = (Vsw + Vcl) / Vcl. Now that you know the swept volume and clearance volume, simply insert those numbers into the formula and solve it. Add the swept volume and cylinder volume together first. Then, divide the result by the cylinder volume to find the compression ratio.
How do you calculate engine compression ratio?
By definition, the compression ratio is the total swept volume of the cylinder with the piston at bottom dead center (BDC), divided by the total compressed volume with the piston at top dead center (TDC).
Can you put 100 octane gas in any 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.
What happens if you put 87 octane in a 93 octane car?
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’re actually filling your car or truck with a different blend of gas, which means it will burn differently in your engine.
Can I use high octane fuel in my car?
It may seem like buying higher octane “premium” gas is like giving your car a treat, or boosting its performance. But take note: the recommended gasoline for most cars is regular octane. In fact, in most cases, using a higher octane gasoline than your owner’s manual recommends offers absolutely no benefit.
What happens if I put lower octane fuel in my car?
If the octane rating is less than 91, you could damage the engine and may void your vehicle warranty. They usually warn that using lower-octane gas could reduce performance and fuel economy. When that happens noticeably, or if engine knock occurs, they advise to start using premium.
Is it okay to use 85 octane?
In an article by USA Today, General Motors fuel specialist Bill Studzinski said, “We do not endorse the use of 85 octane or lower”. The Federal Lands Transportation Institute also said in a document that, “Most modern vehicles with fuel injection can automatically compensate for higher altitude.
What happens if you put 88 instead of 87?
Turns out, some car owners should steer away from using it, even though it can be cheaper than the standard 87 octane fuel that is 10 percent ethanol. The 88 octane should have no effect if you happened to fill you tank with it once, but prolonged use by a car not equipped for it can cause an engine to wear out faster.
Is it OK to mix 85 and 87 gas?
It’s not a really bad idea, your car can pull timing and accommodate the lower octane. By the time you get to low elevation you’ll need to fill up and 87 will be available. If you are worried, just mix it with 89 octane. 85+89 will make 87 when mixed equally.
Is 85 octane the same as E85?
No, 85 octane is a relatively low octane, most regular grade gasolines start at 87 octane. E85 is a different number, That specified the percentage of ethanol in the gas but does not tell anything about octane, which must also be specified on the pump. 85% ethanol is high.
How much HP does E85 add?
The fuel brings a dramatic improvement to the timing of a car without the use of methanol or race gas. With the right tuning, it is possible to make nearly 100w HP difference on E85.
What happens if you mix E85 and regular gas?
Yes, as long as you’re driving a “flex-fuel” vehicle, it won’t cause any problems. Depending on how much E85 you mix in, you might notice a drop in your MPG and in acceleration.