adapting an S5 OMP to an S4 wiring harness
#2
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Sure, anything's possible. I still haven't found an S5 wiring diagram yet, but it looks like there are only 4 steps, so if you can figure out the reference (rpm prob.) & figure out how to hook it into your system and control it, you're set. Ha, it's probably controlled by the ECU so the problem would be................Hell, I'm not that good with electronics.
Nobody's tried it before? I'm lazy and didn't search 1st.
Nobody's tried it before? I'm lazy and didn't search 1st.
#4
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the S5 OMP is 9 wires!!... I have no idea where they all come from. probably not all from the ecu...
first you would need the S5 ecu. which probbaly wouldn't plug into the s4 harness anyways... then you'd have to add the extra wires.
first you would need the S5 ecu. which probbaly wouldn't plug into the s4 harness anyways... then you'd have to add the extra wires.
#5
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So you guys don't think that someone good with electronics could could build something to run it w/o the S5 ecu? Need to learn more about how it works first though. I'm just assuming each position on the stepper motor corresponds to a certain RPM or range.
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#8
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The question is not if or how, but why? The mechanical one is generally regarded as being more reliable, and apart from slightly reduced oil consumption (from more precise metering) I can't see any advantage. You'd need to run the S5 ECU, injectors, loom, etc, which is a lot of work for very little gain.
FYI, seven of the nine wires go to the ECU, the other two are 12V.
FYI, seven of the nine wires go to the ECU, the other two are 12V.
#9
Keep Right Except to Pass
Originally posted by NZConvertible
but why? The mechanical one is generally regarded as being more reliable, and apart from slightly reduced oil consumption (from more precise metering) I can't see any advantage.
but why? The mechanical one is generally regarded as being more reliable, and apart from slightly reduced oil consumption (from more precise metering) I can't see any advantage.
#10
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Originally posted by HeffBoost
So you guys don't think that someone good with electronics could could build something to run it w/o the S5 ecu? Need to learn more about how it works first though. I'm just assuming each position on the stepper motor corresponds to a certain RPM or range.
So you guys don't think that someone good with electronics could could build something to run it w/o the S5 ecu? Need to learn more about how it works first though. I'm just assuming each position on the stepper motor corresponds to a certain RPM or range.
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Brandon
#12
Engine, Not Motor
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Originally posted by No7Yet
Each position of the stepper motor corresponds to an oil flow. The position is dictated by air flow and throttle position. The standalone FD guys have been looking for a way to control the MOP for a looong time, but it's not an easy thing to do.
Each position of the stepper motor corresponds to an oil flow. The position is dictated by air flow and throttle position. The standalone FD guys have been looking for a way to control the MOP for a looong time, but it's not an easy thing to do.
#13
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I'd like to agree, but it'd take more than "minor" electronics experience. There are two state variables that you'd have to track (RPM and airflow), and the oil injection level is nonplanar (see SAE 900036). The technical issues are nontrivial.
There's also a large risk involved in marketing such a device. Overinjection can lead to the annoyance of the constant need to top off the oil level, plug fouling, carbon buildup, and possible engine failure. Underinjection can lead to excessive wear, and thus engine failure.
Brandon
There's also a large risk involved in marketing such a device. Overinjection can lead to the annoyance of the constant need to top off the oil level, plug fouling, carbon buildup, and possible engine failure. Underinjection can lead to excessive wear, and thus engine failure.
Brandon
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