|03-23-2002, 12:54 PM||#1|
Join Date: Dec 2001
Anyone measured IC temps? I have!
Curious about the effects of heat soak in TMIC, I put a thermometer on the intercooler. However, I couldn't find a proper professional digital reader (yet), so I bought a really cheap (about US$15) digital thermometer with waterproof probe 2.5 meters long just for fun.
The observations are weird.
After the engine is fully warmed up, when cruising around town, the temp reads slightly above ambient temp. For example, in a 30C day, the thermometer will typically display 32C/33C.
At stoplights, the temp will gradually rise. Within a couple of minutes, the temp can reach 45C upwards. Surprisingly, when the car starts moving again, the temp drops very rapidly (i.e. faster drop than rise). In less than a minute, the temp will go down to low 30-ish again.
I put the probe on the lower left corner lying on top of the IC. It's probably the hottest part of the IC, being close to the turbo, and supposedly that part of the IC doesn't get much airflow (unless a Zerosports-style splitter is installed).
I'm guessing I'm not doing this right. The probe is reading the AIR on top of the intercooler. Does that sound right? I'm skeptical heat soak goes away that fast. In addition, the fact that when the car is moving (hence air rushes in via the scoop), the temp goes down very quickly to a level near ambient temp. I expect the IC temp will register somewhere in the 40-ish range at the very least (during normal driving).
The probe could be the problem: it is not a metal probe pressing tightly against the metal of the IC, but one that is protected by a rubber enclosure. I press the rubber enclosure down, touching the IC, but I think even that does NOT measure the actual temp of the IC.
My next move would be to source a probe that is often used to read CPU temp. However, my concern is whether such bare metal probe can withstand WATER. My rubber probe can measure aquarium tank temp, so I know my current setup is safe.
I know someone here has installed an IC temp probe too (I remember seeing the pic, the one with the IC metal protection mesh). Do you or anyone else with similar setup care to share your observance? Thanks!
By the way, I've seen the temp went way past 80C after the car was parked for 10 minutes following a normal city drive.
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|03-23-2002, 03:42 PM||#2|
Join Date: Feb 2001
Location: Dublin, CAVehicle:
2002 WRX Sedan
I got a thermocouple and digital reader from work, a guy had it in his desk from the person before the person before him had that office/desk. He gave it to me and said to take it, that he would never use it
I was going to hook it up today. Exposed tip and a clip to get direct metal to metal.
I love free stuff
|03-23-2002, 06:57 PM||#3|
Join Date: Jan 2001
Location: St. Paul MN, USAVehicle:
2002 Impreza WRX
I am in the process of taking actual temps for inside the intercooler. I will be using the Autometer intake temp guage, and I will put one of the probes before the intercooler, and one after. Then I have a bunch of things I can chage to see if they will keep the internal boosted air cool (STI scoop, air diverter, water spray kit, cai). I am going to keep track of my findings and post them when I get some good info for everyone.
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