PARTS: Caspers MAF/IAT Breakout
98 Camaro IAT Sensor
Omega Precision Thermistor
TIME: 10-20 mins
PARTS LINKS: MAF/IAT Breakout GT Dense Harness
Omega Precision Thermistor 44005
IAT Sensor - Local Advance Auto Parts
PART 1: THE PARTS
PART 2: OPTIONAL - OMEGA THERMISTOR INSTALL
Use needle nose pliers and pull the pins from the inside of the housing. May take some force, but they'll come out. At first I figured the whole thing was molded, but they came out with some good pulling force.
Cut old Thermistor with small dykes and Soldered new Omega Thermistor on the leads.
Put Thermistor and pins back into the Sensor housing.
This is not needed, I figured some of the plastic around the thermistor may be warm, and it could skew the readings.
Closeup of Omega Thermistor inside the sensor housing.
PART 3: THE INSTALL
All the required parts.
Relocation Harness and IAT Sensor
Time to pop the hood. This is a simple plug and play install now.
Remove the greay clip and pull the plug out of the MAF
Plug this connector into the Casper MAF/IAT Breakout Harness
Locate the IAT sensor in a good location. I still need to go out get a grommet and put the sensor in the Filter.
PART 4: THE REAL WORLD RESULTS
Since the car was sitting in the garage for a while and the motor was cool, I didn't think the data would be accurate/correct if I started taking readings then, so I went for a 10 min drive... till the motor got warm then started taking logs.
First log: MAF/IAT Stock
Highest temp 129 deg
Lowest temp 108 deg
Second log: Relocated IAT
Highest temp 99 deg
lowest temp 79 deg
Local temps 15 mins after logs were taken.
In conclusion this mod works great. Intake temp readings are around 25 degrees lower than the stock readings. Not quit sure if the Omega sensor is needed, but what the hell it was just another $15. The rate of temp changes were a lot faster than stock. I noticed that it took about 3 secs for the temps to drop from 99 to 81 with the Omega. If you had the stock Thermistor it would probably take a few more seconds.
If you're interested in looking at the HP Tuner logs for these runs download them below. You can see the difference in the rate of change in the temps between stock and modded.
Stock MAF/IAT Log File
Relocated IAT (Omega) Log File
LS1GTO thread on this subject