Fast reacting IAT sensor replaces stock sensor
 

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

Look forward to reading about how this works.

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.

http://i10.photobucket.com/albums/a1...h_DSC00383.jpg
http://i10.photobucket.com/albums/a1...h_DSC00384.jpg
http://i10.photobucket.com/albums/a1...h_DSC00385.jpg
http://i10.photobucket.com/albums/a1...h_DSC00392.jpg
http://i10.photobucket.com/albums/a1...h_DSC00397.jpg
http://i10.photobucket.com/albums/a1...h_DSC00398.jpg
http://i10.photobucket.com/albums/a1...ponseCurve.jpg
http://i10.photobucket.com/albums/a1...h_DSC00378.jpg
http://i10.photobucket.com/albums/a1...h_DSC00379.jpg
http://i10.photobucket.com/albums/a1..._DSC003701.jpg
http://i10.photobucket.com/albums/a1..._DSC003741.jpg
http://i10.photobucket.com/albums/a1...h_DSC00372.jpg
http://i10.photobucket.com/albums/a1...h_DSC00373.jpg

I'm in!

Sounds like a very nice find. I like that you don't have to relocate it. How much are you selling them for?

They are around 42 for both the sensor and connector shipped in the 48 states.

Will this work on any 13B? or is it REW-specific?

count me in.

Look forward to getting this on the car in a week or two.

I was talking to Dale about this..

I'm in!

It will work with any setup that uses the same sensor as a stock fd. Some people have converted stuff over to use the pfc on older rx7s and this iat sensor would work.

Everyone that ordered after the 22nd will be having their sensors shipped tomorrow. Any orders prior to the 22nd already went out.

All sensors were shipped out monday. There were several that were ordered on and after the 22nd and i had to wait for more pigtails to arrive before shipping the orders out. So if you sent a payment no worries as your sensor is on its way.

Received mine. Look forward to putting it in.

Awesome