[evolve automotive]

Intake temps will soar when stationary with all intake systems as far as our testing has shown.

The main thing is how quickly the temperatures drop as soon as you start moving. The Dinan intake and ours which are both similar will drop temperature very fast once the car starts moving.

The probe should ideally be fitted behind the air filter in the intake tube for a true intake temperature reading - ie - what's being drawn in.

 

[evolve automotive]

So that setup is really measuring the temperature behind the bumper near the aux fan. It's meant to be measuring the intake temperature!

Intake probe must be somewhere in the intake tract for the ECU compensations to work correctly!!

 

[evolve automotive]

No idea why but i don't agree with them on this one.

 

[evolve automotive]

Drill a hole in the top hat and screw the probe in so your reading the actual temperature of the sucked air inside the filter.

 

[evolve automotive]

CF tubes get HOT however there is air moving through the tubes which i would assume would cool the probe to the intake air temp...Man the traffic girl on CBS 2 in LA in the morning is hot:blabla:...Sorry watching the news and drinking coffee the AM here...

The traffic girl sounds interesting! Take a picture

I am running prototype stainless steel intake tubes with the probe inside the tube. No heatsoaking and the intake temp = ambient as soon as the speed rises above 40mph or if I give a quick large throttle opening under load in any gear. I tried to make a video of this but it's hard to get shots of the screen with our camera.

 

[evolve automotive]

Sal, how are you viewing the intake temp? I'd like to monitor mine too but don't see it in the secret menu or OBC.

INPA or sometimes BAVtech connected to a laptop.

With Bavtech I tend to log alot of information whilst driving and go back and anaylse it. Sad I know but there is a reason for it!

 

[evolve automotive]

The intake air temperature probe needs to measure the temperature of the air coming into the intake and NOT the outside air temperature.

This completely defeats the point and if you put it outside your actual intake temp will soar above the outside temp.

The readings from this temperature probe are used by the ECU for air intake temperature compensation and manufacturers do this for a reason!

You want to be ******ing the ignition and adding fuel when intake temps are very high so to protect the engine.

You don't want to lie to the ECU and tell it the wrong reading. Why compromise on safety for power in traffic?

Just leave the intake probe in the inlet tract. The datalog the results comparing intake temps with actual ambient temps and you'll see with a good intake temp they will be very close together.

Hope that makes sense and the importance of measuring the actual intake temperature has been briefly covered?

 

[evolve automotive]

That's what we do and that's what we recommend.

 

[evolve automotive]

Thanks for posting that thread.

Unfortunately without understanding how the ECU works not alot can be discussed.

I may add to that discussion at some point but I will tell you now that I have data logged inlet air temperatures with the stock intake system with a remote sensor recording temperatures at different places along the intake tract both before and after the MAF.

The temperature even within the plenum itself is lower than at the maf and before the MAF. It's just a simple case of the sensor within the MAF heatsoaking and due to the type of material it's made from the temperature doesn't come back down to realisitic levels until a very long time.

The main thing is that with a CAI kit, you need to measuring the air being drawn into the engine via the inlet tract.

 

[evolve automotive]

stock intakes with k&n drop in's here. i have the iats mounted in the pass side snorkel(#13 in diagram on previous page) behind the bumper. best spot i could think of to get an accurate reading. iirc the sensor data collected by the dme isn't used on the fly(instantly). i think theres a built in "lag" time for this specific reason. i may be wrong but i swore i read this somewhere.

Good place to put it. We normally put them in the airbox and get no heatsoak issues.

I think you mean refresh rate of the sensor?

That can change with the type of software your using and if your hard drive is busy with other operations which may lead you to think it's slow.

I really should make a video!

 

[evolve automotive]

Wise man you are indeed ard.