Discrepancy between Output 2 CLT Temp and Gauge CLT Temp
#1
Discrepancy between Output 2 CLT Temp and Gauge CLT Temp
Sitting in my garage. I finally removed a colder thermostat that I was using and installed a brand new OEM thermostat in my 1994 1.8L.
Using MSPNP Output2 for Fan Control, the original fan settings were 215F On-Off limit and 5F Hysteresis. I honestly never checked where they actually came on and off, because as far as I could tell, the fans kicked on, kicked off, and I never overheated in autocross. Yippee!
In changing the thermostat, I changed the MSPNP settings, presumably, for the radiator fan to kick on at 207F and off at 202F. I set the On-Off Limit to 247F (207 target +40) and Hysteresis to 5F.
According to the Coolant Temp Gauge on my Tunerstudio dashboard, the fan is actually turning on around 5F lower than my target temperature. If I set my target to 247F (207+40), the fans turn on at 202F. If I set my target at 252F (212+40), the fans turn on at 207F.
In the same respect, the Hysteresis value of 5F seems to make the fans switch off 10F cooler than the On-Off Limit.
So, I settled on settings of 252F On-Off Limit and 10F Hysteresis to have the fan turn on at 207F and off at 197F.
Is this Ok, or is something goofy here?
Using MSPNP Output2 for Fan Control, the original fan settings were 215F On-Off limit and 5F Hysteresis. I honestly never checked where they actually came on and off, because as far as I could tell, the fans kicked on, kicked off, and I never overheated in autocross. Yippee!
In changing the thermostat, I changed the MSPNP settings, presumably, for the radiator fan to kick on at 207F and off at 202F. I set the On-Off Limit to 247F (207 target +40) and Hysteresis to 5F.
According to the Coolant Temp Gauge on my Tunerstudio dashboard, the fan is actually turning on around 5F lower than my target temperature. If I set my target to 247F (207+40), the fans turn on at 202F. If I set my target at 252F (212+40), the fans turn on at 207F.
In the same respect, the Hysteresis value of 5F seems to make the fans switch off 10F cooler than the On-Off Limit.
So, I settled on settings of 252F On-Off Limit and 10F Hysteresis to have the fan turn on at 207F and off at 197F.
Is this Ok, or is something goofy here?
Last edited by Enginerd; 06-16-2013 at 11:05 PM.
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