injdata-fueltype
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injdata-fueltype [2011/12/23 12:11] twdorris |
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| ====== Injector Data - Fuel type ====== | ====== Injector Data - Fuel type ====== | ||
| Fuel flow rate through an injector is affected by a number of different things. This page focuses on the effects of fuel type, primarily fluid properties (viscosity, specific gravity, etc.). | Fuel flow rate through an injector is affected by a number of different things. This page focuses on the effects of fuel type, primarily fluid properties (viscosity, specific gravity, etc.). | ||
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| ===== Overview ===== | ===== Overview ===== | ||
| - | Viscosity is a term you hear all the time, but probably haven't given it much thought in terms of injector flow rate. But imagine the difference in pouring water through a funnel compared to honey. The flow rate will obviously be different. And the flow rate will increase as the honey is heated or decrease as it gets cooler. | + | Viscosity is a term you hear all the time, but probably haven't given it much thought in terms of injector flow rate. But imagine the difference in pouring water through a funnel compared to honey. The flow rate will obviously be different even through the same opening. And the flow rate will increase as the honey is heated or decrease as it gets cooler. |
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| + | That's an extreme example, of course, but the same principles apply to fuel (with the injector being your funnel). Ethanol can be very different from gasoline and even gasoline from one station can be different from another station. | ||
| - | That's an extreme example, of course, but the same principles apply to fuel (with the injector being your straw). Ethanol can be very different from gasoline and even gasoline from one station can be different from another station. | ||
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| * Then we ran a set of FIC BlueMax 2150s. We noted a drop of 6% in flow rate. | * Then we ran a set of FIC BlueMax 2150s. We noted a drop of 6% in flow rate. | ||
| - | The results are summarized below. | + | The results are summarized below. Keep in mind that this is a change in **volumetric** flowrate. On top of this, you still have to adjust for the difference in fuel type. |
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| + | So not only are injectors "smaller" when running on E85 due to E85's lower stoichiometric ratio, but injectors are even smaller than that due to the difference in volumetric flowrate! | ||
| ^ STOCK 450s // (click to enlarge) // ^ FIC BM1450s // (click to enlarge) // ^ FIC BM2150s // (click to enlarge) // ^ | ^ STOCK 450s // (click to enlarge) // ^ FIC BM1450s // (click to enlarge) // ^ FIC BM2150s // (click to enlarge) // ^ | ||
| |{{fueltype-450-effects.png?300|Stock 450}}|{{fueltype-1450-effects.png?300|FIC BM1450}}|{{fueltype-2150-effects.png?300|FIC BM2150}}| | |{{fueltype-450-effects.png?300|Stock 450}}|{{fueltype-1450-effects.png?300|FIC BM1450}}|{{fueltype-2150-effects.png?300|FIC BM2150}}| | ||
| - | So clearly fluid properties need to be taken into account when calculating volumetric flow figures. This effect also appears to depend on the injector type/size too! Like everything else injector related, this just isn't as easy as it seems like it should be at first. | + | So clearly fluid properties need to be taken into account when calculating volumetric flow figures. This effect also appears to depend on the injector type/size too! |
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| + | Like everything else injector related, this just isn't as easy as it seems like it should be at first. | ||
injdata-fueltype.1324660281.txt.gz · Last modified: 2011/12/23 12:11 by twdorris
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