So I've been reading alot about the heatsoaked stock placement IAT (intake air temp) sensor and have decided to move it to the cold side intercooler piping when I build the SMIC setup.

Now, What I haven't been able to find is anyone who has done it and showed the specifics.

What sensor did you use?
What calibration did you use? (assuming you have a PFC)

thanks guys!

 

Theres a guy on the forum that sells the fast-reacting IAT sensors. I bought one and put it back in the stock location and it works great. Temps change very quickly with no heatsoak.

 

Fighters Garage sells one

 

Here's the fighters garage one:

http://www.fighters-garage.com/rx7.html

but it doesn't say where the sensor came from or hw to calibrate it.

I was thinking more like a GM IAT sensor. Or an aftermarket MSD one like this:

http://www.jegs.com/i/MSD+Ignition/121/2320/10002/-1

 

contact Dudemaaanownsanrx7 on this forum he has them. A bunch of us have been running them with no problems.

 

The sensors don't really need to be calibrated. Just plug 'em in and go.

Dale

 

I have the fighter's garage. It's a splice-n-plug. Pretty simple.

No clue where the FG one comes out of, but dude's is out of a TRIUMPH. (he'll correct me if I'm wrong)

 

got mine in the mail yesterday... just too lazy to put it back together

 

I'm running the dudemanrx7 fast acting IAT sensor too. Don't have much to say because I've only run my car for ~20 minutes since installing it but it definitely seemed to work better than the OEM unit. I would just go that route.

 

See that just shows how much people don't know about engine management. Now, I don't know a WHOLE lot but I know these sensors have certain ranges they operate in and the scales they arc through based on voltage they read is what tells you that say .87 volts = 37C or whatever. Things need to be calibrated. Period.

Maybe I'll just call Apexi and see which sensors are compatible.

 

^ actually the values if the sensor have been tested and match the range if the stock unit with a faster reaction time. There's nothing to calibrate. You should do your research.

 

Ok at the sounding like a bizzo. Seriously dude, it's Dale Clark.

Go ahead and call Apexi . . . lol I want an exact transcription of that conversation. I'd like to think it goes something like this...

You: What kind of IAT can i use on my RX7?
Apexi: You should speak with someone that knows RX7s.
You: I did. I told him that he didn't know what he was talking about.
Apexi: . . . *click*

 

ok... I just finished installing mine about 30 min ago... spliced it in, works awesome!! Reacts waayy faster then the OEM on, i got it to about 12Celcius out here right now in Cali on the freeway in about a 5 mile drive

no need to calibrate ANYTHING!

 

I'm sure there is a scale and offset calibration value for the IAT sensor that is contained in the PFC (and the factory computer). It could be changed to accommodate whatever sensor you want, including the inexpensive GM sensors. But that requires disassembling the EPROM and reprogramming it, something that is common on many platforms but not this one.

Thus you have two options. You use the stock sensor or you use one that has resistance values that are very close to stock.

 

AKA this badass sensor

 

+1...a jackass should probably be added for good measure.

 

I'm another running dudemaanownsrx7's sensor. About a year now and I'm happy. I placed it upstream of the UIM, but after the IC.
BTW, dudemaanownsrx7 now offers a connector for the OEM rx7 sensor lead. IIRC it's completely plug and play, no splicing/soldering.

 

Dudemaaanownsanrx7 (Brent) sells them on his web site, wannaspeed.com. if you pm him he could give you the link to his thread on here with all the data you need. And as said its plug and play. Rix

 

I did do my research and found nothing other than what is mostly put here. No data, just "yea it reacts faster." Data without structure or reference points is meaningless.

 

You don't think the people who completely designed a stand alone engine management system for a car know the car very well? I've called AEM for this exact same question and they were able to give me the exact info needed because unlike SOME PEOPLE, they understand the value of accuracy if you're going to spend the time measuring it.

 

That was my thought although I was thinking that if you had the Datalogit, you can get into the areas where you can specifiy ranges for the values.

 

Just went to his site and found it. $53 isn't bad but I'll ping him for info on the unit. thanks.

 

This isn't possible. The PFC would have to be disassembled. A lot of stuff on the PFC is not adjustable.

 

You're absolutely sure?

 

Yes. There's nothing available in the datalogit software.