Welcome to the North American Subaru Impreza Owners Club Monday December 11, 2017
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
Go Back   NASIOC > NASIOC Technical > Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo)

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads. 
Thread Tools Display Modes
Old 03-23-2002, 01:54 PM   #1
Scooby Newbie
Member#: 12968
Join Date: Dec 2001
Question 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.
* Registered users of the site do not see these ads.
GDB is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 03-23-2002, 04:42 PM   #2
Scooby Guru
Member#: 4414
Join Date: Feb 2001
Location: Dublin, CA
2002 WRX Sedan
Midnight Black


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
Concillian is offline   Reply With Quote
Old 03-23-2002, 07:57 PM   #3
Scooby Specialist
Member#: 3533
Join Date: Jan 2001
Chapter/Region: MWSOC
Location: St. Paul MN, USA
2002 Impreza WRX
WR Blue


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.

WRX1 is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Data points: impact of IC water spray on IC temps scooterforever Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 12 04-11-2005 03:43 PM
how to measure air temp after intercooler... criz Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 21 02-20-2005 08:04 PM
Which gauge to use for IC temp? jikhead Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 12 01-06-2004 03:04 PM
Anyone in the Charlotte area have an IC I can borrow? crazyhorse South East Region Forum 3 08-13-2003 10:16 PM
Post IC temps ataac_flat04 Engine Management & Tuning 13 08-10-2003 06:57 PM

All times are GMT -4. The time now is 11:35 AM.

Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2017 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.