this sounds like a lame questoin, but where did everyone put their IAT sensor when they put their turbo kit on? when we put my hahn kit on, there was no place in the piping to put it, so its just hanging.
i can tell a huge difference durning the day when its 95 degrees and at night. will the heat in the engine bay make that big of a difference on the IAT sensor?
should i try and move it to a cooler spot or just leave it the way it is?
Take off the charge pipe, weld up a bung and install a threaded screw-in IAT sensor just before the Throttlebody, just like stock.... and then plug the harness into the sensor.
Done and done.
-Chris-
-Sweetness-
-Turbocharged-
Slowly but surely may some day win this race...
yeah you really need to have it hooked up , the IAT provides the pcm with some of the info needed to adjust timing and fuel curves
and it is best in the charge pipe before the tb
Yeah, a lot of people leave it out, but I'd suggest having it in. The car acts really funny when it's not reading the right temperatures and shifts SUPER hard... with an automatic.
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By the way, if you can't do it, any exhaust shop should be able to tackle the job.
Good luck!
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SunfighterGT wrote:Take off the charge pipe, weld up a bung and install a threaded screw-in IAT sensor just before the Throttlebody, just like stock.... and then plug the harness into the sensor.
I would
not do what he said. A screw in IAT sensor sucks, and the stock sensor will leak boost. Put the sensor in the turbo inlet pipe, right after the filter.
"Only two things are infinite, the universe and human stupidity, and I'm not sure about
the former." - Albert Einstein
Quote:
Put the sensor in the turbo inlet pipe, right after the filter.
That is wrong, you may as well hang it in the engine bay then...The computer will be getting a false reading of the incoming air going into the intake manifold to make the proper adjustments....
You want to do llike everyone else did and buy the camaro V6 IAT sensor that is metal and allready threaded (not plastic and a rubber grommet like ours) and get the 3/8ths bung for it (cant remeber if its 3/8ths or 5/8ths), drill a hold in your charge pipe right before the TB and weld the bung into it ...screw in the IAT and plug it in, and presto!
the threaded IAT sensor part number is floating around the .org somewhere, just do a search if you wanna find it. It was like $17.00 of something close to that.
ill still swear by using the IAT in the charge pipe before the tb
if the iat leaks anything , im sure it would measure in very small amounts , or the iat would get blown out of the pipe , or blown to bits from the boost pressure , which would cause a great leak
my cav actually ran better non-intercooled than it did after the intercooler was installed , besides the extra length in pipe , the iat being placed from the charge pipe to the inlet pipe was the only difference
plus the GM s/c has the iat in the charge area , and not the inlet side
people can argue low boost vs high boost all day long , and ill still knowing the temp as the air is going into the motor is better than knowing what is going in just past the air filter
dave is going of what the guys over at racers edge told him
they said that a good intercooled system will run the same temp at the inlet and at the tb after its cooled
my problem with that is we do not live in a perfect world , people use intercooler sprayers , which will cool more than the inlet temp
and any pressure drop from any type if iat , is gonna be unmeasureable
thats where i have my IAT. and dave...its not leaking any or sucking at all. sorry but your wrong man.
I used to race cars, now I race myself.
5K PB: 24:50
10K PB: 54:26
The problem with the screw in brass type IAT's as I understand it is that they'll heatsoak. I'm guessing's it's particularily bad when they're screwed into a big chunk of metal such as the HO manifold. They work fine as coolant temp. sensors since in that case they're screwed into a plastic housing which makes them less susceptable to heat soak.
I've also heard that the stock plastic IAT will leak. In hypsy's pic it looks like there is a large brass fitting on the IAT ... it doesn't look like a stock 2.4L IAT to me (maybe it's just the pic though).
mj
STFU and think about it for a minute. The brass threaded IAT sensor that you so insist on using is prone to HEAT SOAK! The stock plastic sensor will leak boost. You can epoxy it in if you want, but the sensor BODY ITSELF will leak boost. Sure it will be a small amount, but why do you want ANY boost leak at all?
Now, if you place the brass sensor in a better location, maybe you can avoid some of the heat soak, but I believe it will still give false readings when it gets too hot.
If you have an effective intercooler setup, your intake air should be pretty close to ambient air. Therefore, putting it in the intake should be just fine.
"Only two things are infinite, the universe and human stupidity, and I'm not sure about
the former." - Albert Einstein
HEAT SOAK!
That means
FALSE READINGS!
And suddenly it becomes just as pointless as you claim it is if not in the charge pipe.
So you tell me, who is right here?
You say my way gives you false readings, I say your way gives you false readings.
"Only two things are infinite, the universe and human stupidity, and I'm not sure about
the former." - Albert Einstein
I will give my .02........I rigged up the stock plastic IAT. I work at napa so I have easy access to a ton of jimmy riggin parts...lol. Anyway I used part # 784634 rubber grommet and a 9/16" washer. I welded the washer to my charge pipe just before the t.b. Then I inserted the rubber grommet...very very tight fit btw. Then the iat goes into the rubber grommet extremely tight. I had to use silicone on the grommet to get it in. And I was surprised I got it in without breaking it...lol. But it seals 100% while using the stock sensor. After a couple hundred miles I will turn up the boost to somewhere around 15-17ish and I will know if it leaks or anything. But for now I am only running 8-10 for break in. BTW, it doesn't look half bad either. But I would not leave it hang out in the open!!!
Heat soak?
WHAT heat soak?
My pipe just before the TB is DEAD cold thanks to my intercooler.
I don't see a problem with heat soak, I'm not running a GM charger here.
...... heat soak. Got any more brilliant ideas as to why it won't work?
-Chris-
-Sweetness-
-Turbocharged-
Slowly but surely may some day win this race...
SunfighterGT wrote:Heat soak?
My pipe just before the TB is DEAD cold thanks to my intercooler.
I don't see a problem with heat soak, I'm not running a GM charger here.
-Chris-
The piping before the TB on my 2.2 is usually warm after driving in the summer, and my car is intercooled. So I can see where Dave is coming from about the piping being heatsoaked.
275hp & 306tq - 1999 2.2 ohv
13.2 @ 108 mph
-1996 2.4 liter + Turbo + Built motor + Torco + More boost = Lots o' Power
-2000 Mustang GT + 2004 Cobra motor, Whipple 2.3 supercharger,
built rear-end,Dodge Viper spec T56 6 speed, bolt-ons = wheelies at the track!!!!!
I had mine screwed into the port on the HO manifold. What's the difference if it is in manifold, or just before the t/b? Honest question. . .
Matt S.
<a href="http://www.cardomain.com/id/kindofcavy"><img src="http://img61.exs.cx/img61/8537/J-Sig8b.jpg" alt="Image Hosted by ImageShack.us" /> </a>
Built not bought, check that!
my cold pipe gets warm to while driving so I kinda agree with dave on this one, I was going to get it done the way you said chris but a race shop around here said just to tie it in a good open location so it gets air.
LE61T PTE6262 Powered 
heat soak isnt as big of a issue as some of you think , and if you do a search for the post i ahd for the screw in iat , the iat isnt made like the coolant temp sensor
once the air is moving the temp of the pipes is irrealivant , and they do cool down to the touch
mine is threaded directly into the plenum box from hahn. the sensor and that box thing or normally cool to the touch as is the piping when driving normally.
if i go like 6 or 7 passes in a row the sensor gets a little warm but it has never given a false reading that ive seen on the scanner
I used to race cars, now I race myself.
5K PB: 24:50
10K PB: 54:26
So the IAT sensor helps the computer adjust the timing? I dont really care about the fuel changes considering the PCM has no knowledge of my larger injectors and FMU. But the timing could play I role a suppose? Thanks.
the fuel is important , and plays as big of a roll as the timing
you dont want the computer dumping to much or to little
97cavie24ls(JDM cav sedan) wrote:once the air is moving the temp of the pipes is irrealivant , and they do cool down to the touch
And therein lies the problem. I couldn't have said it better myself. ONCE THE AIR IS MOVING, heat soak is irrelevant. Well, what about the first few minutes before you get moving? What about sititng in traffic?
If you don't believe that it is a problem, go search for IAT heat soak. I have seen actual tests on other vehicles (the Dodge Dakota comes to mind) where the sensor reading was upwards of 150 degrees because of heat soak. Sure, it is only that way until you get moving - but do you really want your car to not run correctly until you get moving? What's that all about?
With your average every day turbo system, when you just don't have the time to research, buy or fabricate, the IAT in the intake is not going to do you bad, if you have an adequate intercooler.
Anyways, I am not arguing that putting the sensor in the charge pipe (after the intercooler of course, I have actually seen people put it before the IC) isn't the best place for it. It is, in fact the best place, since what you want to know is the temp of the air actually going into the engine. BUT, you have to put a lot of time and thought into it, otherwise you will either have problems with heat soak or pressure loss.
The sensor that was discussed in another thread, I believe its a Camaro sensor, which has a plastic sensor element and metal threads might be a good way to go - BUT you need to make sure you don't get any pressure loss with it. Epoxy is a good thing.
"Only two things are infinite, the universe and human stupidity, and I'm not sure about
the former." - Albert Einstein
