Question about Injector Offset Table in LS1-Edit
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From: Raleigh, NC
Question about Injector Offset Table in LS1-Edit Injector Offset table changes is an area I need to explore.
I bought the new Seimens Deka Hi-Z 55# injectors and, though I observe more fuel delivery, I had to lower Inj Flow Rate values below calculated values for the Injector Size, Test Pressure and Rail Fuel Pressure in order to achieve zero LTFT's at WOT and below zero during cruise and part throttle.
After tuning for non-positive values, it ranges from about -1.6 to -14.0 depending on idle, low throttle cruise or modest %TPA.
I get about -1.6 to 0.0 at around 15% or more throttle.
It varies about -14.5 to -4.5 or so at around 0.6 to, say, 10 %TPA.
At idle, it drifts upward until it reaches about -1.6.
When I tuned it with calculations closer to actual size/tested PSI/Rail FP, this wide range of values just made me bump Inj Flow Rates down further and further keep LTFT's from going positive.
The question:
Is there any intelligent way to go about calculating and adjusting Inj Offset for injectors that are othjer than stock?
I think I understand someone has such an animal for SVO 42's. But, what about a set of injectors like mine?
Could it possibly be better to use such a table as used for the 42's as being at least better than the stock Injector Offset and go from there as an example?
Thanks
I bought the new Seimens Deka Hi-Z 55# injectors and, though I observe more fuel delivery, I had to lower Inj Flow Rate values below calculated values for the Injector Size, Test Pressure and Rail Fuel Pressure in order to achieve zero LTFT's at WOT and below zero during cruise and part throttle.
After tuning for non-positive values, it ranges from about -1.6 to -14.0 depending on idle, low throttle cruise or modest %TPA.
I get about -1.6 to 0.0 at around 15% or more throttle.
It varies about -14.5 to -4.5 or so at around 0.6 to, say, 10 %TPA.
At idle, it drifts upward until it reaches about -1.6.
When I tuned it with calculations closer to actual size/tested PSI/Rail FP, this wide range of values just made me bump Inj Flow Rates down further and further keep LTFT's from going positive.
The question:
Is there any intelligent way to go about calculating and adjusting Inj Offset for injectors that are othjer than stock?
I think I understand someone has such an animal for SVO 42's. But, what about a set of injectors like mine?
Could it possibly be better to use such a table as used for the 42's as being at least better than the stock Injector Offset and go from there as an example?
Thanks
