Fast reacting IAT sensor replaces stock sensor
08-15-2009, 12:29 AM
#1
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Join Date: Mar 2008
Posts: 76
I've found a fast reacting air temp sensor to replace the slow stock sensor, I can get a good price if anyone is interested. There is a pretty detailed thread on the other forum, I'll go into more detail about it later. Right now i'm on my cell or i would post more. Pm or email me if you want one or more details. Dudemaaanownsanrx7@yahoo.com
EDIT:
Here is what was posted on the other forum by me.
"On and off over the last several months I've been looking for a fast reacting air intake sensor to replace the slow stock one. A brief overview can be found in the PFC section.
I finally found a part number, and it can be found online for a little over $50 shipped without pigtail. I have a friend that can get them to me for around $35 (I will pass this on to others) I went ahead and got one to test since I had the option of returning it if it didn't work. Well it came in yesterday and I did a series of tests according to the FSM to determine if it was a suitable replacement. Here is what I found.
Results:
FSM STOCK SENSOR RESISTANCE.............................NEW FAST REACTING SENSOR
@68 *F (20c) 2.20 - 2.70 Ohms..................................Tested @68 *F (20c) = 2.27 Ohms
@176*F (80c) 0.29 - 0.35 Ohms.................................Tested @176*F (80c) = 0.34 Ohms
As you can see the sensor falls in the acceptable resistance range for both temperature tests, it has the exact same resistance curve as the stock sensor! This means is we can use this sensor to replace the slow stock sensor, while still sending the ecu the correct temp readings. It's a perfect replacement.
Heat soak issues won't be an issue because the sensor changes so rapidly that once colder air goes past the IAT, the ecu knows this and can add the appropriate amount of fuel. The advantages are a safer, and more precise tune with less need for a safety net. It's commonly known that the stock sensor heat soaks, especially when sitting for awhile or in stop and go traffic. Then once you take off, because the stock sensor is sluggish it's still reading hot air when the air is actually much cooler. This means the tune is either now on the lean side, or if tuned with a large safety margin it's right where it should be. That means in some situations you're not making as much power, and some situations the engine is in more danger.
With a sensor that reacts quickly, you can tune the engine for what it needs based on the actual temperature and actual density of the air. Often times I had to wait several minutes after sitting in a parking lot before I could stomp on it because the AIT was reading way high and I didn't want to boost until they dropped where they should be.
The sensor uses the same thread pitch as stock, and a common bosch connector. If anyone else wants one send me a PM and I'll see about getting some more for other people. This will work on any ECU that uses the stock sensor, even including the stock ECU. I took some pics of the tests performed. If anyone wants more information or pics let me know."
I will include several pics that are scattered around on the other forum. This will include pics taken from my testing, pics of the exact same triumph senor found in my motorcycle, pics of my first order and shipment of sensors, and a graph comparing the reaction of the stock sensor to the fast sensor. Feel free to ask questions or PM/email me to get information on an exact price for the sensor and bosch connector shipped.
Brent
Please note the pics are not in any particular order, click to enlarge them.
EDIT:
Here is what was posted on the other forum by me.
"On and off over the last several months I've been looking for a fast reacting air intake sensor to replace the slow stock one. A brief overview can be found in the PFC section.
I finally found a part number, and it can be found online for a little over $50 shipped without pigtail. I have a friend that can get them to me for around $35 (I will pass this on to others) I went ahead and got one to test since I had the option of returning it if it didn't work. Well it came in yesterday and I did a series of tests according to the FSM to determine if it was a suitable replacement. Here is what I found.
Results:
FSM STOCK SENSOR RESISTANCE.............................NEW FAST REACTING SENSOR
@68 *F (20c) 2.20 - 2.70 Ohms..................................Tested @68 *F (20c) = 2.27 Ohms
@176*F (80c) 0.29 - 0.35 Ohms.................................Tested @176*F (80c) = 0.34 Ohms
As you can see the sensor falls in the acceptable resistance range for both temperature tests, it has the exact same resistance curve as the stock sensor! This means is we can use this sensor to replace the slow stock sensor, while still sending the ecu the correct temp readings. It's a perfect replacement.
Heat soak issues won't be an issue because the sensor changes so rapidly that once colder air goes past the IAT, the ecu knows this and can add the appropriate amount of fuel. The advantages are a safer, and more precise tune with less need for a safety net. It's commonly known that the stock sensor heat soaks, especially when sitting for awhile or in stop and go traffic. Then once you take off, because the stock sensor is sluggish it's still reading hot air when the air is actually much cooler. This means the tune is either now on the lean side, or if tuned with a large safety margin it's right where it should be. That means in some situations you're not making as much power, and some situations the engine is in more danger.
With a sensor that reacts quickly, you can tune the engine for what it needs based on the actual temperature and actual density of the air. Often times I had to wait several minutes after sitting in a parking lot before I could stomp on it because the AIT was reading way high and I didn't want to boost until they dropped where they should be.
The sensor uses the same thread pitch as stock, and a common bosch connector. If anyone else wants one send me a PM and I'll see about getting some more for other people. This will work on any ECU that uses the stock sensor, even including the stock ECU. I took some pics of the tests performed. If anyone wants more information or pics let me know."
I will include several pics that are scattered around on the other forum. This will include pics taken from my testing, pics of the exact same triumph senor found in my motorcycle, pics of my first order and shipment of sensors, and a graph comparing the reaction of the stock sensor to the fast sensor. Feel free to ask questions or PM/email me to get information on an exact price for the sensor and bosch connector shipped.
Brent
Please note the pics are not in any particular order, click to enlarge them.
08-21-2009, 07:00 PM
#4
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Join Date: Mar 2008
Posts: 76
here's an ebay link to the item if that makes it easier for anyone.
http://cgi.ebay.com/ebaymotors/ws/eB...STRK:MESELX:IT
http://cgi.ebay.com/ebaymotors/ws/eB...STRK:MESELX:IT
08-22-2009, 12:54 PM
#6
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Join Date: Mar 2008
Posts: 76
Yeah the sensor works awesome. I had an extremely long thread on the evil forum with people posting results and asking questions until the **** moderators deleted the 4 month old thread with over 500 posts. All the writeups, testing, and logs just gone.
12-30-2009, 02:12 PM
#7
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Join Date: Mar 2008
Posts: 76
Just a lil update, I now have plug n' play harness' for the sensor. Plugs directly into the stock FD harness. Heres some pics, the first is the harness by itself, and the second is the harness plugged into the factory IAT clip. Ebay link is dead, best way to get a hold of me is to email dudemaaanownsanrx7@yahoo.com.
-Brent
-Brent
01-17-2010, 03:41 AM
#8
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Join Date: Mar 2008
Posts: 76
01-26-2010, 09:22 PM
#10
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