ECU temp v. Radiator inlet temp (coolant)
#2
I haven't seen anything about it. It might exist though. There shouldn't be much difference between the two though considering the coolant in the radiator inlet and CLT sensor are both in or coming from the head. I would suspect the CLT sensor to read higher because it is in the back of the head where coolant flow is lesser and normally hotter.
Atleast that's my WAG.
Atleast that's my WAG.
#3
I haven't seen anything about it. It might exist though. There shouldn't be much difference between the two though considering the coolant in the radiator inlet and CLT sensor are both in or coming from the head. I would suspect the CLT sensor to read higher because it is in the back of the head where coolant flow is lesser and normally hotter.
Atleast that's my WAG.
Atleast that's my WAG.
I did not have a feel for what to expect however.
#5
{I have a 91, not sure if that makes a difference}
Last edited by aseer; 02-12-2008 at 10:19 PM.
#7
Thanks, I took a modified radiator cap and stuck a thermocouple through it into the coolant flow and saw about a 20F difference (20F cooler at the radiator compared to what my MSPNP was reading, once the valve opened and long enough to reach steady state - the thermocouple was calibrated).
I did not have a feel for what to expect however.
I did not have a feel for what to expect however.
#8
Well, it's an 8 bit variable, so the cpu is going to see it as a value between 0 and 255 (so only 256 possible values across the temperature range). Take a look at thermfactor.inc and you'll see the mapping. It looks like the range is from -96F to 408F. If you narrowed the range down to something that would work in your climate, you could get more resolution.
You'll need to reload the firmware with the new table if you make changes.
You'll need to reload the firmware with the new table if you make changes.
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