Coolant Temp and EvoScan
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Coolant Temp and EvoScan
I noticed what seemed like high coolant temp values on a couple of logs. This morning, I started the car and logged as it warmed up. The logged value from EvoScan at "full operating temp" was showing as 206.9024F. The factory gauge reads as normal.
I have logged the car with a PocketLogger before and recall "full operating temp" as being closer to 180 - 190F so it looks like my displayed value is about 20F off.
Is anyone else experiencing the same thing? I know one person mentioned similar results here.
Has anyone compared to a PocketLogger to check the value from EvoScan?
I have logged the car with a PocketLogger before and recall "full operating temp" as being closer to 180 - 190F so it looks like my displayed value is about 20F off.
Is anyone else experiencing the same thing? I know one person mentioned similar results here.
Has anyone compared to a PocketLogger to check the value from EvoScan?
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Yes, they are off. I think you have to subtract -10 from the coolant temp value. and oxygen sensor reading is off too. you have to add +.1 to that. well... it was the result of experimenting with my pocket logger and evoscan.
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Originally Posted by TTP Engineering
How tough is it to change the XML formulas?
now the question is what new value or multiplier is the correct one to use???
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looks like that Eval formula is screwed.
Someone gotta know the right way to translate to Fahrenheit from this register reading.
LogReference="CoolantTemp" RequestID="07" Eval="((-1.468x+139.74)*1.8)+32"
Someone gotta know the right way to translate to Fahrenheit from this register reading.
LogReference="CoolantTemp" RequestID="07" Eval="((-1.468x+139.74)*1.8)+32"
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Okay, try this formula instead. I think it should be around right range if original formula was the close one.
Find this line LogReference="CoolantTemp" RequestID="07" Eval="((-1.468x+139.74)*1.8)+32"
and replace Eval with
Eval="((-1.468x+134.18)*1.8)+32
or
Eval="((-1.645x+139.74)*1.8)+32
Let me know which one works better
Find this line LogReference="CoolantTemp" RequestID="07" Eval="((-1.468x+139.74)*1.8)+32"
and replace Eval with
Eval="((-1.468x+134.18)*1.8)+32
or
Eval="((-1.645x+139.74)*1.8)+32
Let me know which one works better
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had 2 revive this 1 as Im experiencing the same issue. 203*F @ idle...
Just had a turbo and o2 (recirculated) installed today.
Last time I logged coolant temp, (while back) it was ~ 180 ish @ idle and have seen 162*F while cruising/on dyno, but wouldnt go lower than 188*F tonight while cruising. (~50* outside)
temp guage on dash is normal.
MUT 07 (0x6A47), Eval = "x*1.8+32", metric eval = "x", unit = "deg F", metric unit = "deg C", guage/chart min/max = 190
does this look about right?
Just had a turbo and o2 (recirculated) installed today.
Last time I logged coolant temp, (while back) it was ~ 180 ish @ idle and have seen 162*F while cruising/on dyno, but wouldnt go lower than 188*F tonight while cruising. (~50* outside)
temp guage on dash is normal.
MUT 07 (0x6A47), Eval = "x*1.8+32", metric eval = "x", unit = "deg F", metric unit = "deg C", guage/chart min/max = 190
does this look about right?
Last edited by nonschlont; Dec 1, 2010 at 02:32 AM.