I was wondering if there are any air temp sensors out there that share the same ohm range as the FD so that it can be compatible with the PowerFC.
I'm currently working on making complete wiring harnesses from scratch for non-seq and single turbo setups and I'm trying to make it as plug and play as possible for the PowerFC guys. Unfortunately I cannot identify the air temp plug as a Sumitomo or Tyco. It would seem just replacing the sensor and connector all together would be an easier solution.


A bit off of topic but I am getting most of the sensor plugs but there are a few I just cannot get and replacing an air temp sensor with an aftermarket style should be no problem for anyone looking for a nice new high temp wire harness. The only other two that I cannot get is the thermo switch plug, that shouldn't be a problem as I can use a universal switch and I would choose a lower temp rating as well. The other one I cannot get is the TPS connector, that one usually remains in great shape so I can have people send theirs in for fitting of new pins. The most important one that I'm getting in the mail is the one that seems to be everywhere on this harness. It's the connector for the crank angle sensors as well as a bunch more things, I feel like I struck gold with that one. since it is one of the elusive Sumitomo connectors.

 

There is a fast reacting open element sensor for a triumph motorcycle that's supposed to work well with the power fc. I plan on using one.

 

Would you happen to know the part number? Anyone else know of other sensors? Looks like there is hope somewhere.

 

No been trying to find out for sure myself. But i have an 02 955i and will test it's sensor, that should help if it works

 

awww, crap. I'm an idiot, I miss labeled my connector database and realized that the air temp sensor connector is easy to get. It is the IAC connector I can't get. I suck, sorry.

 

A promising part number appears to be #T1290510. I ordered one myself and well be testing it. If it works out a friend of mine said he can get them to me for around $35. If anyone else is interested let me know. But first I'm going to make sure it's the right sensor.

They can also be found here for just over $50 shipped.
http://speedsupplies.com/partslistin...00&category=TM

 

A handy part number that, i knew there was a triumph part as it gets sold on ebay.co.uk as a RIAT (raceing inlet air temp) but its a bit steep.
Thanks

 

Keep us updated...

 

I will. As soon as it comes in i'll test it. Then whoever wants to get them through my guy can let me know and i'll order several and pass the lower price on to everyone else.

 

Be sure to post the resistance for the Triumph AIT sensor at the temperatures used for the tests as posted in the FSM.

 

Alright I can do that. It won't be too hard to determine if it will work or not.

 

Bump for update on AIT sensor.

 

lol it's been 2 days still hasn't come in yet.

 

Read Forum rules, you are to update every day, even if there is nothing to report. LOL

I'm very interested in this AIT sensor project, keep us posted.

 

The sensor should be here today or tomorrow the tracking showed it 60 miles from me

 

Good news everyone. I got the sensor in today, and I tested it the same way according to the FSM. It has the exact range as the stock sensor except much faster response. I performed the test by filling a water bottle up and sticking a cooking thermometer in, I then cooled or heat the water to the correct temperatures, removed the thermometer, stuck the end of the sensor in and tested the resistance of the sensor. I also took some pictures of the results. If anyone is interested in getting one of these sensors send me a PM. Feel free to ask questions.

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

Pics (CLICK TO ENLARGE):

 

Thanks for the info, nice one.
Do you know if the plug is the same as an FD?

Phil

 

One thing I just though of Brent, the factory sensor has a coating over the outside of the sensor. You might want to remove that via a wire wheel and see the reaction timing after that. Sorry to bring up more work but why cut off another connector and have to tap another hole if you don't necessarily have to...

I have a GM IAT in my shop that I've been meaning to test for a long time. Maybe this will put some "pep" in my step...

 

My stock sensor has already had the coating removed. Still isn't near as fast as this one. The threads are the same so drilling a hole isn't needed. The connector isn't the same, It uses a bosch plug, same as the bosch injectors. The gm sensors have a different resistance range.

 

Here is a discussion on the same part and there is a diagram to show the differences http://mazdarotaryclub.com/forums/sh...ht=riat&page=4

 

Thanks for your research.
I'm in, sending PM.

 

Thanks guys. Yeah I found that discussion awhile back when I was looking for a part number on the sensor the first time, but throughout the whole thing they never mentioned one.

 

More pics and a chart comparing the difference between stock and this sensor. This was grabbed from the link posted above.

 

looks like i'm going to have to pick one of these up once break-in is complete.

it seems like the factory sensor was intentionally slow reacting so that the factory IAT correction tables would be easier to configure for a mass production vehicle. Think about it: a faster reacting sensor heatsoaks more and might have made it trickier for them to tune for smooth hot starts and low emissions. Drastic spikes in IAT readings would require a lot more correction from the closed loop system.

 

It might have been the technology at the time was in these slow sensors, and when the fast sensors did become available it would cost too much to switch over. Or maybe they saved $1 per vehical and decided it just wasn't cost effective from a manufacturing standpoint.Hard to say, there are at least other vehicles with faster sensors (GM and triumph), but maybe they don't get as hot. In any case the mazda did do some strange things, and if they really wanted to they could have used a faster sensor and probably had better results IMO. That's okay though, improving our cars is what we all love for anyways. If mazda got it perfect the first time what would we all do with our time.

Since we have 2 discussions going in 2 sections I'm going to link the other discussion from here in case anyone wants to read over the other thread in the 4rd gen section. https://www.rx7club.com/classifieds-violations-265/fast-reacting-replacement-iat-sensor-found-844553/