IS there a way to view air intake temps?

OrangeMustangGt · Jun 23, 2006

Just so i can watch, is there a gauge that can display air intake temps?
Can i make one somehow using a IAT sensor? Do they sell actual gauges? thanks guys.

95cobraguy · Jun 23, 2006

i know u can use a scan tool and auto meter makes intake air temp gauges as well but they're expensive as sh-t.

BlueOvalStangGT · Jun 23, 2006

Tweecer!

blksn955.o · Jun 23, 2006

TweecerR/T actually but yeah that will do the trick.

HISSIN50 · Jun 23, 2006

All are correct. They do sell gauges too, but they're pricey (being for the forced induction crowd).

I'd rig up a DMM to the IAT and measure voltage. A lot of scantools wont even give a temp readout (they do for the ECT, but show IAT as voltage). Then you use a chart to infer temps from the reading.

Monsterbishi · Jun 23, 2006

As above, just use a Multimeter, after all, it's not the actual temp you need to know, just how much it changes from what measures as the norm.

Mustang5L5 · Jun 23, 2006

Who has a chart that translaters voltage values to temp values??

I think a simple program could be made to translate this data to temp figures and then display on a small LCD screen. Hmmmm.......

bill302 · Jun 23, 2006

Mustang5L5 said:
Who has a chart that translaters voltage values to temp values??

I think a simple program could be made to translate this data to temp figures and then display on a small LCD screen. Hmmmm.......

idle air temp. sensor (iat) at a temp of 50*fahrenheit should read 58.75 ohms at 68* 37.30 ohms at 86* 24.27 ohms at 104* 16.15 ohms and at 122* should read 10.97 ohms...can you do something with this info.and if you do the math you can figure exact ohms and temps from 50*-122*.. and this is the ohm reading between the 2 sensor terminals when sensor is disconnected...could you install a second iat sensor just to leave disconnected and read the ohms to determine temp? just a thought...

BlackVert · Jun 23, 2006

i have not seen a mapping function or table in the tweecer (or anywhere else for that matter) for intake air. there must be one in the eec, but it might be internal or something

where is your sensor, near the maf or in the lower intake?

the temp at the lower intake will always be much higher than at the maf

OrangeMustangGt · Jun 23, 2006

thanks guys. I was sort of thinking a gauge style one that i could keep installed. But i guess its not really an issue, i do have a wideband that i just got so i can monitor what i need with that i guess

HISSIN50 · Jun 23, 2006

One issue is that the NTC curve is parabolic as I recall - that's why interpolating a chart can be easier than anything else (though in the range of temps we're interested in, one might be able to assume a linear trend).

Engineer Mike (5L5) is definately smart enough to do something with this, but it could be a real PITA to program it up (that kind of thing is Greek to me).

final5-0 · Jun 23, 2006

Come on now Kyle

Just spring for a PMS, SCT, or Tweecer

Then you can look at all that stuff till your eyes go

A dollar or two more for a new high tech toy

You Bet

Grady

OrangeMustangGt · Jun 24, 2006

thanks man, but i allready have a custom chip and the car runs pretty well. I am going to buy the burner/software though so i can do some tweaking. I guess i dont really NEED to know the intake temps but it would be nice.

Asa side note, does anyone know of a way to "datalog" without a tweecer, etc? I mean, do they make a cheap peice of hardware for a computer that can accept inputs?

Mustang5L5 · Jun 24, 2006

HISSIN50 said:
One issue is that the NTC curve is parabolic as I recall - that's why interpolating a chart can be easier than anything else (though in the range of temps we're interested in, one might be able to assume a linear trend).

Engineer Mike (5L5) is definately smart enough to do something with this, but it could be a real PITA to program it up (that kind of thing is Greek to me).

I'm not that good with programming. I can do some but I'm more mechanical in my expeirence. I'll drop a line to a few of my friends in Comp Engineering and Electrical Engineering and see if they have any input.

Basically you would need a spare ATC sensor, a DMM to read the resistance values and a chart to translate OHMS to Temp. After that it should be a simple program to rig up an small LCD display.

I assume all Ford ACT's read the same value? If i get some time later i'll see if i can come up with a chart based on the values given and then maybe go buy a ACT and do some testing with a digital thermometer and the ACT with DMM.

final5-0 · Jun 24, 2006

Cheap

Self tuning
and
Data Acquisition

Don't think you can run all those Coons up the same tree

I saw a good while back a data gathering device called snEEC or something kinda like that but then again ... it wasn't Cheep

Wonder how much a thermo couple would set you back

Grady

urban96 · Jun 24, 2006

http://store.summitracing.com/partdetail.asp?autofilter=1&part=ATM-5772&N=115&autoview=sku

200 tho

Monsterbishi · Jun 24, 2006

GreenMustangGt said:
Asa side note, does anyone know of a way to "datalog" without a tweecer, etc? I mean, do they make a cheap peice of hardware for a computer that can accept inputs?

The hardware is quite easy to make actually, about $3 worth of bits, have them in front of me actually, the difficult bit is sussing out the appropriate codes to extract a response from the ecu, OBD-I systems generally use one form or another of ALDL, a serial communications protocol, basicly you fire a query at it, then the ecu will echo the query back, with the response after it.

To get the ball rolling though, one needs to know the aldl wakeup code, on some ecu's it's in the form of a query, on others, it's a hardware toggle, ie, grounding a wire on the ecu.

BobCat · Mar 21, 2007

OrangeMustangGt · Mar 21, 2007

this is old....why did you bring it back?

IS there a way to view air intake temps?

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