Intake Temp Sensor

[gtm_maxwell]

Any Ideal where should we install the Air Intake Temp sensor? Before or After the Throttle?...

please let me know which are the best location for the Air Intake temp? and Why that is the best location....

[paulr33]

after intercooler before throttle body
that way it shows air temp going into the engine

[RickyLee53]

As above is correct, for some strange reason when i bought my car mine was installed in the inner wing.

I've since moved it to about 2 inches before the throttle body but i still only get a few degrees rise in the intake temp.

Maybe my cooler and this cold weather is better than i thought. The most i've seen is around 23 degrees.

[gtm_maxwell]

What happen if I install the Intake Temp sensor after the Throttle( inside the Manifold)? Will that couse Trouble?

Tks...

[RickyLee53]

Originally Posted by gtm_maxwell

What happen if I install the Intake Temp sensor after the Throttle( inside the Manifold)? Will that couse Trouble?

Tks...

I've seen this done before.

It depends where inside the plenum you mount it i guess, it could effect airflow slightly or could be in a dead area where the readings might not be accurate, also the plenum will heatsoak more (could be seen as a good or bad thing i suppose).

[94AWDcoupe]

First I have found the PFC temp sensor is way too slow. I have tried the fast acting GM probe and it reads very similar as far as scale. And it lightening fast.

There isnt much difference before or after TB. The measured temp is pretty much the same. There is a difference before or after turbo. factory temp sensor is before turbo. This tells ecu what intake temp air temp is. This can be used usefully. As outside air gets hotter so does air entering into engine.

The manual tells you to install the sensor in the intake manifold. This to me is a far better place. Now the actual air temp going into the engine is recorded.This is far more useful when the ecu is setup correctly. I use alky injection and I want the ecu to know whether or not the alky is flowing. If alky is not flowing you can add fuel and take away some timing as sort of a simple failsafe. But you cant do this on the handheld. You have to have tuning software.

[RickyLee53]

Originally Posted by 94AWDcoupe

First I have found the PFC temp sensor is way too slow. I have tried the fast acting GM probe and it reads very similar as far as scale. And it lightening fast.

There isnt much difference before or after TB. The measured temp is pretty much the same. There is a difference before or after turbo. factory temp sensor is before turbo. This tells ecu what intake temp air temp is. This can be used usefully. As outside air gets hotter so does air entering into engine.

The manual tells you to install the sensor in the intake manifold. This to me is a far better place. Now the actual air temp going into the engine is recorded.This is far more useful when the ecu is setup correctly. I use alky injection and I want the ecu to know whether or not the alky is flowing. If alky is not flowing you can add fuel and take away some timing as sort of a simple failsafe. But you cant do this on the handheld. You have to have tuning software.

I'm noticing this more and more.

I think its time for a new MAP and a new AIT sensor.

[gtm_maxwell]

Originally Posted by RickyLee53

I've seen this done before.

It depends where inside the plenum you mount it i guess, it could effect airflow slightly or could be in a dead area where the readings might not be accurate, also the plenum will heatsoak more (could be seen as a good or bad thing i suppose).

If the Temp sensor Install before Blow off, will that show incorrect Information on the Temp going into the Eng?.

To get best result is to install the Temp into Manifold to know the correct temp that go into the Manifold, but most of the time I found out that the intake Manifold have some oil inside... the Black stuff..and will that cost the problem to the Temp Sensor?... Or Even Damage the Sensor? in long term..

any comment?

[jenx1976]

Just for INFO:
I have the Blits RVI-T and it can read AIT from the ecu via the ODB port on my 05 VIII.....

[Benja]

Good point on the slowness, so its just the sensor itself???
Mines no where near the same speed as the water temp sensor in reading, although thats pretty slow as well.

[RickyLee53]

Originally Posted by gtm_maxwell

If the Temp sensor Install before Blow off, will that show incorrect Information on the Temp going into the Eng?.

To get best result is to install the Temp into Manifold to know the correct temp that go into the Manifold, but most of the time I found out that the intake Manifold have some oil inside... the Black stuff..and will that cost the problem to the Temp Sensor?... Or Even Damage the Sensor? in long term..

any comment?

Mines after the blow off valve, about 2 inches off the throttle body.

My sensor is slow, and to be honest, my AIT are never really into the range where i'd use the ECU to trim the fueling anyway.

[jaytengan]

i put mines before on my IC pipe like right before.... it doesnt really matter just make sure u get one that works or ur idles going to be at 1500rpms cause tat happened to me