MEGAsquirt A place to collectively sort out this megasquirt gizmo
Sponsored by:
Sponsored by:

Different types of IAT sensor + Calibration

 
Old 03-29-2009, 04:30 AM
  #1  
Junior Member
Thread Starter
iTrader: (6)
 
Join Date: Aug 2008
Location: New Zealand
Posts: 248
Total Cats: 3
Default Different types of IAT sensor + Calibration

Is anyone using any different sorts of Intake Air Temp sensors?
If so, please post your outcomes.

My research shows that this GM sensor came off a late 80's Pontiac, (which we have bugger all of, over here in NZ).

I am thinking of trying a japanese AIT, mostly because the cost is way less, but also because they are more available.

I realize you would then you would run into calibration difficulties, which would be my next question: How did you calibrate it to MS?
ogwazza is offline  
Old 03-29-2009, 10:26 AM
  #2  
Elite Member
iTrader: (21)
 
paul's Avatar
 
Join Date: Jun 2006
Location: Point Pleasant, NJ
Posts: 2,956
Total Cats: 2
Default

You'd have to determine the sensors resistance at different temps to development the curve. Then you plug in those values into EasyTherm. Then burn them into the firmware.

put sensor in ice cold water, verify temp with accurate thermometer, measure resistance.
put sensor in warm water, verify temp with accurate thermometer, measure resistance.
put sensor in hot water, verify temp with accurate thermometer, measure resistance.

those temps and those resistance values get plugged into EasyTherm.

btw, this is documented in the MS section.
paul is offline  
Old 03-29-2009, 10:58 AM
  #3  
Elite Member
iTrader: (22)
 
Join Date: Dec 2006
Location: Sunny Spanish speaking Non US Caribbean
Posts: 3,232
Total Cats: 3
Default

You can also see how Stein calibrated his in the thread he started about his Adaptronic ems installation.
Rafa is offline  
Old 03-29-2009, 12:14 PM
  #4  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 76,514
Total Cats: 2,305
Default

Braineack is offline  
Old 04-01-2009, 08:27 AM
  #5  
Junior Member
 
kday's Avatar
 
Join Date: Aug 2008
Location: Boston
Posts: 223
Total Cats: 0
Default

I am using a Bosch IAT. Used on turbo Audis circa 2000 and up. It works perfectly with the Bosch curve from easytherm. $20 or so (I got mine from here though that probably doesn't help you in NZ). I think they used the same sensor on the VW 1.8t.
kday is offline  
Old 04-01-2009, 12:34 PM
  #6  
Junior Member
iTrader: (1)
 
Join Date: Oct 2006
Location: Cincinnati, OH
Posts: 375
Total Cats: 0
Default

I'd like to use one of those Bosch sensors in the manifold, it'd get rid of the heat soak issue since it's plastic. Unfortunately, I can't weld aluminum to put a receiver in for the hold down bolt.
StankCheeze is offline  
Old 04-02-2009, 10:36 AM
  #7  
Newb
 
Join Date: Sep 2008
Location: UK
Posts: 39
Total Cats: 0
Default

Can i use this method for an open IAT sensor? Would the water damage it?
Seal is offline  
Old 04-02-2009, 01:59 PM
  #8  
Junior Member
 
Join Date: Dec 2008
Location: Alameda, CA & San Luis Obispo, CA
Posts: 78
Total Cats: 0
Default

I have 2 multimeters with temperature probes, I stick them in water with the sensor and go through 0,25,50,100 C and average between the 2 meters.
djcommie is offline  
Old 04-02-2009, 03:22 PM
  #9  
Supporting Vendor
 
Matt Cramer's Avatar
 
Join Date: Sep 2006
Posts: 2,329
Total Cats: 62
Default

It's safe to put an IAT sensor in for a short while; just don't let it soak for a couple hours.
__________________
Matt Cramer
www.diyautotune.com
Matt Cramer is offline  
Old 04-02-2009, 03:48 PM
  #10  
Senior Member
iTrader: (2)
 
Join Date: Jun 2006
Location: Springfield, NJ
Posts: 667
Total Cats: 0
Default

Originally Posted by StankCheeze View Post
I'd like to use one of those Bosch sensors in the manifold, it'd get rid of the heat soak issue since it's plastic.
Whoa ..... you really think that would eliminate the heat soaking issue? That would be awesome for me.
evank is offline  
Old 04-03-2009, 02:41 PM
  #11  
Senior Member
iTrader: (2)
 
Join Date: Jun 2006
Location: Springfield, NJ
Posts: 667
Total Cats: 0
Default

The AEM sensor also has a plastic tip vs. GM sensor's metal tip ... AEM costs more but it's threaded: AEM - Air Inlet Temperature Sensor Kit
evank is offline  
Old 04-03-2009, 07:07 PM
  #12  
Elite Member
iTrader: (21)
 
paul's Avatar
 
Join Date: Jun 2006
Location: Point Pleasant, NJ
Posts: 2,956
Total Cats: 2
Default

metal tip? my GM IAT does not have a metal tip, it's ceramic.
paul is offline  
Old 04-03-2009, 07:30 PM
  #13  
Senior Member
iTrader: (2)
 
Join Date: Jun 2006
Location: Springfield, NJ
Posts: 667
Total Cats: 0
Default

I stand corrected.
evank is offline  
Old 04-06-2009, 01:26 PM
  #14  
Supporting Vendor
 
Matt Cramer's Avatar
 
Join Date: Sep 2006
Posts: 2,329
Total Cats: 62
Default

There's a couple copies of GM IATs with a metal tip out there. The one we sell isn't one of them but I have seen them included with Holley kits and some parts stores stock them.
__________________
Matt Cramer
www.diyautotune.com
Matt Cramer is offline  
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
StratoBlue1109
Miata parts for sale/trade
21
09-30-2018 01:09 PM
tazswing
Race Prep
20
10-03-2015 11:04 AM
Greasyman
General Miata Chat
2
09-28-2015 10:44 AM


Thread Tools
Search this Thread
Quick Reply: Different types of IAT sensor + Calibration


Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.