Does ECU pull timing in Open Loop like it does in Closed Loop?
07-02-2015, 11:06 AM
#12
it pulls 1.4 degrees at 140F, linear to 10 degrees at 248F. I haven't looked at my IAT very closely sitting in traffic, but it seems like it would get into that range. Your thoughts?
07-02-2015, 11:39 AM
#14
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That's how mine is set up also. While idling I see temps of 142-145*, but they drop as soon as you start moving. I also logged a 2nd gear pull recently on a 98* day in heavy heavy traffic and I saw 132* at 23psi. I'm running a non-heat shielded 4" intake, 3.5" heat exchanger and a cobra pump on my vortech t trim. We will not see any gains by moving the IAT sensor.
07-02-2015, 12:00 PM
#15
There's lots of discussion on relocating the sensor, in its current location IMO (when not heatsoaked) its in the most accurate place - in the intake manifold. We all know Honda relocated it in later years but they will have 100pc tweaked the maps. General rule of thumb is colder air more timing dvance in simple terms.
However i would definitely check over the timing in the GEMU on a RR, its been tuned with it in a different location.
A standalone ECU has IAT compensation tables too just like the stock ECU.
However i would definitely check over the timing in the GEMU on a RR, its been tuned with it in a different location.
A standalone ECU has IAT compensation tables too just like the stock ECU.
07-02-2015, 12:05 PM
#16
That's how mine is set up also. While idling I see temps of 142-145*, but they drop as soon as you start moving. I also logged a 2nd gear pull recently on a 98* day in heavy heavy traffic and I saw 132* at 23psi. I'm running a non-heat shielded 4" intake, 3.5" heat exchanger and a cobra pump on my vortech t trim. We will not see any gains by moving the IAT sensor.
05-18-2017, 09:11 AM
#18
Thread Starter
Gentlemen,
Old thread revisit as I have more questions about OEM ECU ignition timing. OEM ECU with Emanage Ultimate & SOS Racing heat exchanger with COBRA pump and regular coolant.
1) At which AIT does the OEM ECU retard timing & how much?
2) At which Coolant Temp does the OEM ECU retard timing & how much?
Reason I ask, in a 90F day my 70mph cruising temps are:
Water: 217F (With AC on)
Water: 205F (With AC off)
AIT: 125F (Up to 150f after long pulls and drops back down to 125F)
Old thread revisit as I have more questions about OEM ECU ignition timing. OEM ECU with Emanage Ultimate & SOS Racing heat exchanger with COBRA pump and regular coolant.
1) At which AIT does the OEM ECU retard timing & how much?
2) At which Coolant Temp does the OEM ECU retard timing & how much?
Reason I ask, in a 90F day my 70mph cruising temps are:
Water: 217F (With AC on)
Water: 205F (With AC off)
AIT: 125F (Up to 150f after long pulls and drops back down to 125F)
05-18-2017, 09:38 AM
#19
Gentlemen,
Old thread revisit as I have more questions about OEM ECU ignition timing. OEM ECU with Emanage Ultimate & SOS Racing heat exchanger with COBRA pump and regular coolant.
1) At which AIT does the OEM ECU retard timing & how much?
2) At which Coolant Temp does the OEM ECU retard timing & how much?
Reason I ask, in a 90F day my 70mph cruising temps are:
Water: 217F (With AC on)
Water: 205F (With AC off)
AIT: 125F (Up to 150f after long pulls and drops back down to 125F)
Old thread revisit as I have more questions about OEM ECU ignition timing. OEM ECU with Emanage Ultimate & SOS Racing heat exchanger with COBRA pump and regular coolant.
1) At which AIT does the OEM ECU retard timing & how much?
2) At which Coolant Temp does the OEM ECU retard timing & how much?
Reason I ask, in a 90F day my 70mph cruising temps are:
Water: 217F (With AC on)
Water: 205F (With AC off)
AIT: 125F (Up to 150f after long pulls and drops back down to 125F)
217 seems too hot for those conditions btw. I don't think that is normal. It borderline overheating. Still stock radiator? How many miles on the OEM thermostat? fans kick on at 204 and should be able to keep you there in most cases, certainly at cruising. Your data logging may be off. Definitely possible if you are using E manage to monitor.
Last edited by s2000Junky; 05-18-2017 at 09:42 AM.
05-18-2017, 11:47 AM
#20
Thread Starter
Good question, it would be fascinating to know. Unfortunately i've never come across this information, nor have been able to depict it during any kind of data logging of my own. I'm not sure how one would even find out, unless they were able to crack into the stock ecu and figure out how it was mapped. Analyzing DBW 06+ might be more possible and lend to some possible insight into the earlier years. Maybe Gernby has some knowledge of this.
217 seems too hot for those conditions btw. I don't think that is normal. It borderline overheating. Still stock radiator? How many miles on the OEM thermostat? fans kick on at 204 and should be able to keep you there in most cases, certainly at cruising. Your data logging may be off. Definitely possible if you are using E manage to monitor.
217 seems too hot for those conditions btw. I don't think that is normal. It borderline overheating. Still stock radiator? How many miles on the OEM thermostat? fans kick on at 204 and should be able to keep you there in most cases, certainly at cruising. Your data logging may be off. Definitely possible if you are using E manage to monitor.
-170k miles on the Thermostat & car.
-OEM ECU OBD2 Port with ScanGaugeII is used to track these temps
In a 90F day:
My fans kick on at 207, temps spike (wtf?) to 214 for a few seconds then they slowly drop down to 200 and fans turn off. Temp slowly climbs to 207 and the cycle starts over.
With AC (ON) the car just stays at 217 the whole time.