Air Intake Temp sensor style & position
 

Id like to know what style of IAT everyone here prefers and if they've put it in a different position to factory , i.e. in the compression elbow as the picture shows.

Attachment 622432

The two most common sensors seem to be these two

Attachment 622433Attachment 622434

The Bosch IAT sensor is a much better sensor in terms of construction. The calibration of the sensors is different though. If you have an aftermarket ECU such as a Link G4/G4+, it's just a matter of changing the calibration for the sensor in the software from Delphi to Bosch. Obviously, the sensors mount differently too, so the weld-on fitting will need swapped over as well.

Quite a few people install fast reacting IAT sensors from a Triumph motorcycle.

I got mine from www.lms.-efi.com, you can also buy a PnP wire harness so its a breeze to install. They also mount into the stock location.

Attachment 622395

Looks good, and robust with that brass housing.

Still keen to hear if anyone uses the Bosch style too

I got the metric thread Delphi fast acting iat sensor from Bellinger motorsports. Was about $ 16usd I think. I drilled and tapped the stock location for the bigger thread. You can borrow the drill/ tap if you want to go that route

I read a lot that any of the brass fitting IATs are partial to heat soak as the brass takes on the same temperature as the metal its screwed into. I'd like to think the Bosch style wouldnt be as affected as much .

Maybe not so much with the plastic caged Dephli style as well.
But the brass caged Triumph style (in the factory position being heated additionally from the engine below) would be transferring heat off the sensor protection cage as air passed through it and onto the sensor in the process..

Obviously not in a catastrophic way, because it works just fine, but still.

Fast reacting? Really?

How could the stock not react correctly? I mean the technology isn't that complex is it? It's basically a thermometer

Truthfully I always thought the stock one stunk but I think that's based on commentary by the forum. having said that is there proof out there that says the stock is slow or wrong? I know the perception is that it does but is there science to back that up?

I now have meth and When I spray i do see the temps react.

The conversation about anything to do with the factory sensor has been tackled before and not my intention of the thread at all.

- I wanna know if anyone is using the latest technology in air intake temp sensors (particullary the Bosch style)
- what they think about them
- and if they've put the sensor in a different location then the factory sensor under the UIM :-)

Lol. Settle down. This is a car forum.

Running the stock ECU, the Triumph "fast reacting" sensor is preferred. Uses a standard bosch type connector, use the same resistance [or close to] as the factory sensor, yet responds sooner. The factory sensor heat soaks and just takes longer to change resistance.

When going for a build, seems the preference is to migrate the sensor to somewhere other than the stock location. Reason being, the UIM is cast iron and absorbs tons of heat from the motor below. Moving to somewhere not in the UIM and post intercooler is preferred.

With aftermarket ECU's, just about any AIT can be used. Just need to calibrate it correctly.

Matt

^
Cast aluminium you mean :)

I dunno, my feelings on the subject, derived only from what iv read (no real world testing) is that the IAT is better in the stock location because it will give a more accurate reading of air temp that is actually entering the engine as its closer to the combustion chamber.

My feeling is also that in this day in age, engineers will obviously know that a sensor will usually be in a physically warm environment (and not just the probe end). It will be exposed to external heat in almost any environment where they are made to be used. So my feeling is that they are designed for it.

Its made to screw into something that will be warm, because it will be metal, and the gas inside that is to be measured is also warm so its only logical engineers know it will screw into something that's hot, and it still needs to do its job.

I drilled & tapped for a different sensor a week or so ago and after my research I picked the UIM. is that correct? I dunno, i think modern sensors are made to perform in the environment which they are designed for though.

Fast-reacting relocated post-SMIC but pre-WI nozzle and throttle-body.
Has been working well with my particular car and needs.

Yes. And I've previously commented on this elsewhere on this forum.

I've used the GM open element IAT sensor (by definition, fast acting).

I located it in the LIM where the stupid AWS assy was previously located. I removed the cast AWS boss using my trusty sawzall and then tapped the remaining hole with a 3/8" taper thread pipe tap. Screwed in the sensor and done. A very clean install and looks factory.

I also prefer the LIM location over the Greddy Elbow as I think it better represents what the engine sees under all operating condition (the cooler elbow location would often move the afr rich, particularly under light load and cruise).