Welcome to the North American Subaru Impreza Owners Club Thursday March 28, 2024
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
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.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 04-05-2005, 10:16 PM   #1
scooterforever
Scooby Specialist
 
Member#: 55011
Join Date: Feb 2004
Location: New England
Vehicle:
1999 Legacy Outback

Default Data points: impact of IC water spray on IC temps

Well, I finally put my 100 psi over-the-top water sprayer back on after 4 months of winter storage. One change from when I ran this setup last summer/fall, is that now I have a dual probe IC temperature gauge (reads temps from the turbo, reads temps leaving the IC, and tells me the difference in degrees F between the two).

I have only had time for one 20 minute run on and off the highway this evening, but I will edit this post to include additional data as I collect it. Here are my findings, which, for the lack of data logs, are somewhat subjective:

1. blasting water on the IC at 70 mph in 53 degree weather... does not lower temps in an already cool intercooler. I tried short bursts, I tried long bursts... the IC output temps didn't appreciably change. This is very useful information to me, because in my prior setup, I had a boost switch wired to fire the IC sprayer. In the course of a WOT run, I would exhaust 20% of my water supply. I now know that as long as my IC was cool from the start, spraying at boost probably doesn't help that much, at least for that particular WOT run. This may change as the temp rises towards summer.
2. sprayinig water on the IC after a WOT run, does cool the IC down faster than without the water spray. This is as expected.
3. a wet IC (either already wet, or spraying it when stopped) results in the IC heating up more slowly when at idle than a dry IC. Again, I lack the data logs to prove this, but 1. the theory makes sense, and 2. from how fast I have seen the IC warm up when idling, I feel confident it took more time with the sprayer than without.

For those interested, I'm using the Davtron dual probe gauge (purchased from Lindsey racing) on the stock intercooler with an '02 STi hood scoop and modified splitter.
* Registered users of the site do not see these ads.
scooterforever is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 04-05-2005, 11:14 PM   #2
mantra1
Scooby Specialist
 
Member#: 23568
Join Date: Aug 2002
Location: Tampa
Vehicle:
'08 Forester STi
Shaggin' Wagon Thrice

Default

Nice. Where are you located? Keep us informed when summer rolls around.
mantra1 is offline   Reply With Quote
Old 04-05-2005, 11:34 PM   #3
scooterforever
Scooby Specialist
 
Member#: 55011
Join Date: Feb 2004
Location: New England
Vehicle:
1999 Legacy Outback

Default

Quote:
Originally Posted by mantra1
Nice. Where are you located? Keep us informed when summer rolls around.
Mass -- so it'll get relatively hot in the summer, though certainly not tropical.
scooterforever is offline   Reply With Quote
Old 04-06-2005, 01:11 AM   #4
skubie209
Scooby Newbie
 
Member#: 73249
Join Date: Oct 2004
Location: Central,CA
Vehicle:
03 WRX 4EAT
WRB

Default

how much did that IC temp gauge cost you? I went to their website but couldn't find it.
skubie209 is offline   Reply With Quote
Old 04-06-2005, 08:31 AM   #5
scooterforever
Scooby Specialist
 
Member#: 55011
Join Date: Feb 2004
Location: New England
Vehicle:
1999 Legacy Outback

Default

I found it at Lindsey Racing -- but if you call Davtron I think they'll hook you up even though you may not find the product on their site. If memory serves, it was $250, which struck me as a bargain for a dual probe gauge that also reads the difference between the two probes. It's actually manufactured as an aircraft component. The only catch is you need to use a 32 threads per inch (? think that was it) tap, which I was able to find at McMaster after some searching.
scooterforever is offline   Reply With Quote
Old 04-11-2005, 10:22 AM   #6
Calebz
Scooby Specialist
 
Member#: 54398
Join Date: Feb 2004
Chapter/Region: NWIC
Location: Souf Central France
Vehicle:
1980 CB400 Hawk
1996 GrandCherokeeLimited

Default

What would be really helpful is if you could get some numbers showing the cooling in every day commute situations. Heat soak occurs most often when sitting in rush hour traffic. Consequently, I find most of my sprayer tank getting used at stop lights and such.

For those without any way to test the temp, heres a little less scientific test. Sit in traffic in the sun for an hour with no sprayer. Pull into a gas station, pop the hood and put your hand on the IC fins. Then, in the same typ weather, do a good 70mph drive down the freeway. Again, pull off and put your hand on the IC fins. you will notice a substantial difference in he temp. In low to zero aoriflow situations, the TMIC is not the best thing. Thats when a sprayer becomes most effective.

And while your info above is good, is it possible you could put up some actual numbers? I am installing thermocouples before and after the IC in my wagon and would be interested in comparing.
Calebz is offline   Reply With Quote
Old 04-11-2005, 10:53 AM   #7
scooterforever
Scooby Specialist
 
Member#: 55011
Join Date: Feb 2004
Location: New England
Vehicle:
1999 Legacy Outback

Default

Quote:
Originally Posted by Calebz
What would be really helpful is if you could get some numbers showing the cooling in every day commute situations. Heat soak occurs most often when sitting in rush hour traffic. Consequently, I find most of my sprayer tank getting used at stop lights and such.

For those without any way to test the temp, heres a little less scientific test. Sit in traffic in the sun for an hour with no sprayer. Pull into a gas station, pop the hood and put your hand on the IC fins. Then, in the same typ weather, do a good 70mph drive down the freeway. Again, pull off and put your hand on the IC fins. you will notice a substantial difference in he temp. In low to zero aoriflow situations, the TMIC is not the best thing. Thats when a sprayer becomes most effective.

And while your info above is good, is it possible you could put up some actual numbers? I am installing thermocouples before and after the IC in my wagon and would be interested in comparing.
I'll see what I can do. What I lack is actual data-logging capacity (from a laptop or other automated approach). Stay tuned.
scooterforever is offline   Reply With Quote
Old 04-11-2005, 11:23 AM   #8
Calebz
Scooby Specialist
 
Member#: 54398
Join Date: Feb 2004
Chapter/Region: NWIC
Location: Souf Central France
Vehicle:
1980 CB400 Hawk
1996 GrandCherokeeLimited

Default

Quote:
Originally Posted by scooterforever
I'll see what I can do. What I lack is actual data-logging capacity (from a laptop or other automated approach). Stay tuned.

While automated datalogging is nice, its not really necessary. If you have the probes, just spot checking under various circumstances will give you a good idea of whats going on.
Calebz is offline   Reply With Quote
Old 04-11-2005, 11:28 AM   #9
snvin
Scooby Specialist
 
Member#: 50578
Join Date: Dec 2003
Chapter/Region: Tri-State
Location: -= Best Pizza /\ =-
Vehicle:
2014 Fiesta ST
-=meh=-

Default

Interesting... Does the I/C thermometer take its readings from the center of the I/C? The side?
snvin is offline   Reply With Quote
Old 04-11-2005, 11:53 AM   #10
Calebz
Scooby Specialist
 
Member#: 54398
Join Date: Feb 2004
Chapter/Region: NWIC
Location: Souf Central France
Vehicle:
1980 CB400 Hawk
1996 GrandCherokeeLimited

Default

What I am looking at is a pair of probes, one looking at the air temp before the IC and one after. They will be embedded in the IC pipe.
Calebz is offline   Reply With Quote
Old 04-11-2005, 12:40 PM   #11
scooterforever
Scooby Specialist
 
Member#: 55011
Join Date: Feb 2004
Location: New England
Vehicle:
1999 Legacy Outback

Default

On my setup, one probe is right next to where the metal fitting for the Y hose is. The other (going into the throttle body) is in the opposite side, in the airflow leaving the IC and going into the throttle body silicone hose.
scooterforever is offline   Reply With Quote
Old 04-11-2005, 02:23 PM   #12
Vlad
Scooby Guru
 
Member#: 46135
Join Date: Oct 2003
Chapter/Region: Tri-State
Location: NY
Vehicle:
19 GLA45 AMG
C63 AMG

Default

Would be nice if There was a way to measure the result of modding by bypasing the TB heater, I was wondering how much the air temperature would drop after that.
Vlad is offline   Reply With Quote
Old 04-11-2005, 02:43 PM   #13
cdvma
Scooby Specialist
 
Member#: 21980
Join Date: Jul 2002
Chapter/Region: NESIC
Location: Central MA
Vehicle:
2002 PSM WRX (Sold)
2017 BMW X5

Default

This is expected. I/C sprays are supposed to be for combating heat soak (like sitting in line for the strip). Water wont remove any more heat if the I/C is already operating at a nominalized temp.
cdvma is offline   Reply With Quote
Reply

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
IC Water Spray Temp. Switch? chmoorewrx Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 20 08-14-2007 01:15 PM
Convert IC water spray to Water Injection? wgknestrick Water/Methanol Injection, Nitrous & Intercooler Cooling 1 09-24-2003 09:04 AM
help with pressure switch for IC water spray Penguinking Electrical & Lighting 5 07-30-2003 12:25 PM
up-pipe, ebc/mbc or IC water spray? codean Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 10 04-25-2002 07:34 PM
IC water spray setup, Cheep, any thoughts? thepas Technical Forum Archive 6 05-20-2000 08:38 PM

All times are GMT -4. The time now is 10:32 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2024 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.