Fast acting IAT sensor

[nos92mx3]

As some of you may know I have been recently testing and tuning the placement of the iat sensor in my intercooler piping.
I very recently deleted the vaf sensor so this became a priority.

Ive tested the factory Iat sensor, while it worked and drove fairly well I could not get the sensor to seal and thus had a large boost leak.

I have also used a coolant temp sensor wired in place, since it uses the same resistance values and is threaded - no more leaks, but another problem.
It is a brass sensor meant to be submerged into water, so when subjected to air it is extremely slow reacting. this is not good when also using a water/meth kit, driveability really suffered.

While searching google of all places I came accross an old post on a rx7 forum about the same issue, their brass sensors were becoming heat soaked. I discovered while reading that a triumph motor cycle uses a fast acting iat sensor, it has an open tip and uses the same resistance values as the rx7, which also happens to be the same as our beloved bp/b6.

So come monday i will be installing this sensor and seeing how it reacts. Im really excited to see what this t3 and meth kit can do.

[yunvmyegt]

i hate the gm iat(plastic open element with brass threads) i have, it gets heat soaked after sitting for a while when i go to start it ms says like 120+ when the air is obviously way under that. i was gonna get another laser thermometer and just see where the mid range is on the piping basically after its cold soaked and before its heat soaked. ive read the miata guys going way down by the fmic but they would get under the average iat reading so it was sorta cold soaking it... i looked around for a full plastic gm iat but couldnt find one, i should see if anything new pops up tho its been a while...

[Ace]

i hate the gm iat(plastic open element with brass threads) i have, it gets heat soaked after sitting for a while when i go to start it ms says like 120+ when the air is obviously way under that. i was gonna get another laser thermometer and just see where the mid range is on the piping basically after its cold soaked and before its heat soaked. ive read the miata guys going way down by the fmic but they would get under the average iat reading so it was sorta cold soaking it... i looked around for a full plastic gm iat but couldnt find one, i should see if anything new pops up tho its been a while...

Where is your IAT located? what about a little closer to the TB than right off the IC

[yunvmyegt]

its directly on the bend before the TB where lex suggests putting it

[FE3-323]

anxiously awaiting results!!!

[nos92mx3]

Recieved the sensor today and just got back from the store.
reisitance does test almost exactly the same, but reaction time does not compare one bit.

The factory coolant sensor, would take a few moments once submerged in water to change resistance, The open element sensor was almost imediate!
Even just lightly blowing on the sensor caused a noticeable change.
Currently affixing the sensor to the upper charge pipe, will report back later with results.
Note:
The sensor is a 10x1.25 thread.
NOT a 3/8ths npt i found on the interwebz.

[FE3-323]

[nos92mx3]

Wow, i just got back from the first test drive and I will say It was well worth the 20$ the sensor cost me.

Idle was rock solid on startup, part throttle driveability has returned with a vengance and Wot?
Let me tell you about wot, It feeels like a whole new car. Its louder the torque steer is stupid, ive never had the car want to change lanes going into 3rd...

The meth kit makes this, Ill try and grab a video tomorrow....

[Ace]

picture of the setup? wonder if this would benefit on my setup..

[Mazda_Powered]

nice! link to your newly acquired sensor? might have to give this a try

[Boosted Escort]

What ecu are you using? megasquirt?

[nos92mx3]

picture of the setup? wonder if this would benefit on my setup..

Basically its just threaded into the last elbow before the throttle body

nice! link to your newly acquired sensor? might have to give this a try

Ebay search for triumph 955 sensor.

Heres one: http://cgi.ebay.com/ebaymotors/2000-...item35b070d97b

What ecu are you using? megasquirt?

The beauftiful part is this is on a piggy back, an aem fic to be exact.
With the megasquirt you have the option of using a gm open element.
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Another important part, The only sensor ive seen tested is the green bodied one, like in the link above. Ive also seen a black bodied sensor but i do not know how it measures up, proceed at your own risk.

And of course I hold no responsibility for what you do to your car, ie blow it up. I have my anti knock accounts in a row, do you?

[Mazda_Powered]

awesome! So you just pulled the old IAT sensor from the VAF (little plastic nipple), sealed it up, then setup the new sensor on the charge pipe, then connected the 2 wires? seems pretty damn simple lol

[Mazda_Powered]

GM IAT are fast acting too, been looking them up online lol seeing what I can find at the wrecking yard so I can get a good placement on it.

http://www.ebay.ca/itm/Intake-Air-Temperature-Sensor-Connector-Kit-/250878738632?pt=Motors_Car_Truck_Parts_Accessories&hash=item3a6989c0c8#ht_500wt_922

I know it's more expensive, just showing it's fast acting though...could probably find cheaper.

[miK3Pro]

So this could work with the gtx ecu?