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injdata-lowpwvariance [2011/12/15 05:56] twdorris |
injdata-lowpwvariance [2011/12/15 05:57] twdorris |
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For example, on a set of 1450 cc/min injectors running on gasoline with a 2.0L 4-cylinder engine, you'd expect to idle in the 1.6-1.7 ms range. And as you can see in the next section, the behavior of any given injector down in that range can be very different from the behavior in the 2ms range. It doesn't sound like much of a difference, but it can be as much as a 30-50% difference in some areas. That's huge! That's like having one cylinder running at 14.7:1 and another running at 9:1 with the __same__ pulsewidth. | For example, on a set of 1450 cc/min injectors running on gasoline with a 2.0L 4-cylinder engine, you'd expect to idle in the 1.6-1.7 ms range. And as you can see in the next section, the behavior of any given injector down in that range can be very different from the behavior in the 2ms range. It doesn't sound like much of a difference, but it can be as much as a 30-50% difference in some areas. That's huge! That's like having one cylinder running at 14.7:1 and another running at 9:1 with the __same__ pulsewidth. | ||
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- | To be clear, this behavior isn't specific to the FIC BM1450s. Every injector set out there can have this problem to varying degrees. We're basically operating many of these injectors down in an area where they're really not intended to produce precise flow. | + | To be clear, this behavior isn't specific to the FIC BM1450s. Every injector set out there can have this problem to varying degrees. We're forcing these injectors to operate in an area where they were really not intended to produce precise flow. Basically, we're using the injectors in an application where they weren't designed to be used. So we have to pay a little extra attention to the details. |