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How do you determine what size fuel injector to use?

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How do you determine what size fuel injector to use?

Injector Math: How to Calculate Optimum Fuel Injector Size

  1. Step 1: Determine Horsepower.
  2. Step 2: Determine Approximate BSFC (Brake-Specific Fuel Consumption)
  3. Engine Type BSFC Using Gasoline.
  4. Step 3: Determine Your Safe Duty Cycle.
  5. Step 4: Calculate Your Optimum Injector Size.
  6. Step 5: Fine-Tune the Flow.

Does ethanol damage fuel injectors?

Ethanol in gasoline has been associated with injector problems. This is most prevalent if you get a bad batch of E10 or E15 that has undergone phase separation.

How do you calculate fuel injector flow?

Calculate flow rate on pressure change

  1. The formula to find the new FUEL FLOW rate after a fuel pressure change:
  2. Example 1: A 240 CC injector tested at 43.5 PSI is run at 50 PSI.
  3. So, the resultant change in pressure would yield the following: 240 cc/Min X 1.0721 = 257 cc/Min. 22.86 Lb/Hr X 1.0721 = 24.51 Lb/Hr.

Do I need bigger injectors to run E85?

It’s necessary to have such large injectors when using E85, because you must plan for about 30 percent more fuel, due to E85’s lower energy. This also means larger fuel pumps are required to provide the volume needed.

Do I need bigger injectors for flex fuel?

Yes it needs to be tuned. The factory injectors can run up to e50 as it cannot deliver enough fuel safely and will run lean. Larger injectors will get you to e85. You can still run 89-93 and the sensor will change its fuel and spark map accordingly.

Can fuel injectors be too big?

Bigger is not always better It’s easy to fall into the trap of thinking that bigger fuel injectors equal more power, but unless your engine is set up to deal with the extra fuel, you’ll be on a fast track to trouble. The excess fuel will flood the engine and it either won’t run at all, or will be running too rich.

What does ethanol do to injectors?

Ethanol is an excellent cleaner. It clears the engine, fuel lines, and fuel injectors of deposits. It’s common for deposits to build up in the combustion chamber, fuel lines, fuel injectors, and a few other places within the engine.

How long can E85 sit in injectors?

You also dont want high concentration of E85 sitting in your fuel lines / teed up in your injectors it will corrode / clog them. I recommend not letting sit for more than a week. A month to be honest, but you will hear many answers. My car sits quite often getting about 2000 miles a year at most.

Can I run E85 on stock injectors?

you will not be able to run ethanol on the stock injectors without risk.