CAI intake temperature datalog request!
9/10/05, 11:22 AM
#1
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Gents,
There has been so many threads talking about the advantages of various materials and functionality of various CAI in reference to intake air temperatue. Given that there are so many Predators and X-Cal 2s out there in the hands of various folks with aftermarket intakes, why don't we data log some temperature data and FINALLY put a nail in this coffin?
Here is what I propose:
1) Setup: Everyone datalog vehicle speed, outside air temperatue and inlet air temperatue.
2) Warm the car up completely for at least 15 minutes driving were you want and how you want.
3) Data log the car at idle for at least 4 minutes (like you are sitting at a long light)
4) Data log the car at 30 mph after at least 1 minute to let temps stabalize
5) Data log the car at 60 mph after at least 1 minute to let temps stabalize
Once you have collected the data, post it here. We need to see the vehicle speed, outside air temp and inlet air temp for each of 3), 4) and 5) above. You folks with stock intakes can join in too. From my own experience, you should find that the stock intake is pulling in a LOT of hot air, at least mine does! For item 3), be sure to show what the temps were when you started idling and what they were at the end of 4 minutes.
Let the data logging begin!
There has been so many threads talking about the advantages of various materials and functionality of various CAI in reference to intake air temperatue. Given that there are so many Predators and X-Cal 2s out there in the hands of various folks with aftermarket intakes, why don't we data log some temperature data and FINALLY put a nail in this coffin?
Here is what I propose:
1) Setup: Everyone datalog vehicle speed, outside air temperatue and inlet air temperatue.
2) Warm the car up completely for at least 15 minutes driving were you want and how you want.
3) Data log the car at idle for at least 4 minutes (like you are sitting at a long light)
4) Data log the car at 30 mph after at least 1 minute to let temps stabalize
5) Data log the car at 60 mph after at least 1 minute to let temps stabalize
Once you have collected the data, post it here. We need to see the vehicle speed, outside air temp and inlet air temp for each of 3), 4) and 5) above. You folks with stock intakes can join in too. From my own experience, you should find that the stock intake is pulling in a LOT of hot air, at least mine does! For item 3), be sure to show what the temps were when you started idling and what they were at the end of 4 minutes.
Let the data logging begin!
9/10/05, 06:58 PM
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Im game with the WMS...but the filter is @ Outerwears at the moment, and battery is moving to the rear.
Sounds like fun to me, I'd play right now
4 min is a long light
Why let stabalize, why not record them them as well??
To throw a guess out there, I bet the WMS will have the cooler temps out them all....especially during #3..IMO
Car is warm when water hits 180, and oil ~150. I can get that well before 15 minutes, I like this idea.I'd have numbers for you right now....lol
Lets see some numbers memebers, this is interesting.
Sounds like fun to me, I'd play right now
4 min is a long light
Why let stabalize, why not record them them as well??
To throw a guess out there, I bet the WMS will have the cooler temps out them all....especially during #3..IMO
Car is warm when water hits 180, and oil ~150. I can get that well before 15 minutes, I like this idea.I'd have numbers for you right now....lol
Lets see some numbers memebers, this is interesting.
Ladies and Gentlemen . . . . . datalog your engines . . . . 
9/10/05, 09:38 PM
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05STG1,
The reason I specified 15 minutes is to make sure everything is up to temperature. The engine will warm up quickest, but it will take longer for all the "other" stuff under the hood to hit their normal temperature as well. And until they do, we really don't know what the heat soak is doing to the intake air temp.
I agree. 4 minutes IS a long light! That's why I picked that number. Worse case.
I'll try to get out and collect my data tomorrow on a stock GT intake system.
What got me thinking about this was when I was seeing 132F inlet air temps while sitting at a light (playing with my X-Cal 2 of course!). The outside air was only 90F! Once I was moving down the road, the temps dropped down, but they stayed well above ambiant temp, even on the interstate at 80 mph.
The reason I specified 15 minutes is to make sure everything is up to temperature. The engine will warm up quickest, but it will take longer for all the "other" stuff under the hood to hit their normal temperature as well. And until they do, we really don't know what the heat soak is doing to the intake air temp.
I agree. 4 minutes IS a long light! That's why I picked that number. Worse case.
I'll try to get out and collect my data tomorrow on a stock GT intake system.
What got me thinking about this was when I was seeing 132F inlet air temps while sitting at a light (playing with my X-Cal 2 of course!). The outside air was only 90F! Once I was moving down the road, the temps dropped down, but they stayed well above ambiant temp, even on the interstate at 80 mph.
9/11/05, 08:57 AM
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Originally posted by StangNut@September 11, 2005, 12:26 AM
RRRoamer, what intake are you using?
RRRoamer, what intake are you using?
Ditto
9/11/05, 11:26 AM
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Someday I'll learn how to read.
9/11/05, 04:28 PM
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Ok. Here are my results with a stock GT intake (and other than tune, stock GT)
1) The ambiant air temperature for this test was 82F. I'm sure it changed a bit as I drove around, but nothing major.
2) I drove a round for just under 22 minutes before I started the heat soak.
3) At the START of the heat soak, the inlet air temperature was 116F (+34F)
4) At the 4 minute mark, the inlet air temperature was 139F and still rising! (+57F)
5) Sonic didn't deliver my Coke for a few more minutes, so at the end of just under 7 minutes, the inlet air temperature was 148.4F (+66.4F) AND STILL RISING! Just rising slower...
6) At the start of my 30 mph cruise, the temperatue was 146.8F (+64.8F)
7) At the end of the one minute at 30 mph cruise, the temperatue was 133.8F (+51.8F) and still falling. I had a red light, so I had to bring the 30 mph cruise portion of the test to an end.
8) I had to drive around 45 mph or so for the next several minutes before I got to were I could set the cruise at 60 mph. Just under 8 minutes passed from the end of the 30 mph test to the start of the 60 mph test. Needless to say, things cooled off quite a bit in that time!
9) At the start of the 60 mph test, the inlet air temperature was 102.2F (+20.2F) and fairly stable (I can see every single stop light just with the inlet air temperature!).
10) At the 1 minute mark, the inlet air temperatue was 96.0F (+14F).
11) I kept the cruise set for a bit longer, and at the end of 1 1/2 seconds, the inlet air temperatue was 95.6F (+13.4) and stable.
So, what can I say about the stock air intake? It absorbs a LOT of heat from the engine compartment. Based on the slow response time of the air temperature, it is also pretty clear that most of the temperature problems are DIRECTLY related to the inlet system heating the air as it passes through it. Otherwise, the temperatures would react quickly once the car is moving and fresh air is being rammed under the hood.
Now, we just need to see the results from different aftermarket systems!
1) The ambiant air temperature for this test was 82F. I'm sure it changed a bit as I drove around, but nothing major.
2) I drove a round for just under 22 minutes before I started the heat soak.
3) At the START of the heat soak, the inlet air temperature was 116F (+34F)
4) At the 4 minute mark, the inlet air temperature was 139F and still rising! (+57F)
5) Sonic didn't deliver my Coke for a few more minutes, so at the end of just under 7 minutes, the inlet air temperature was 148.4F (+66.4F) AND STILL RISING! Just rising slower...
6) At the start of my 30 mph cruise, the temperatue was 146.8F (+64.8F)
7) At the end of the one minute at 30 mph cruise, the temperatue was 133.8F (+51.8F) and still falling. I had a red light, so I had to bring the 30 mph cruise portion of the test to an end.
8) I had to drive around 45 mph or so for the next several minutes before I got to were I could set the cruise at 60 mph. Just under 8 minutes passed from the end of the 30 mph test to the start of the 60 mph test. Needless to say, things cooled off quite a bit in that time!
9) At the start of the 60 mph test, the inlet air temperature was 102.2F (+20.2F) and fairly stable (I can see every single stop light just with the inlet air temperature!).
10) At the 1 minute mark, the inlet air temperatue was 96.0F (+14F).
11) I kept the cruise set for a bit longer, and at the end of 1 1/2 seconds, the inlet air temperatue was 95.6F (+13.4) and stable.
So, what can I say about the stock air intake? It absorbs a LOT of heat from the engine compartment. Based on the slow response time of the air temperature, it is also pretty clear that most of the temperature problems are DIRECTLY related to the inlet system heating the air as it passes through it. Otherwise, the temperatures would react quickly once the car is moving and fresh air is being rammed under the hood.
Now, we just need to see the results from different aftermarket systems!
9/11/05, 06:30 PM
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Nice RRR, good work there 
. I cant say Im surprised by those numbers, but I didnt expect them that high from the stock box. Look where the stock box is getting air from, I would have expected a little cooler temps considering where its drawing air from.
IMO, there's not much available fresh air where the stock box sits. Im sure most have looked from underneath and noticed that as well. The engine compartment (lack of heat extractor vents) holds alot of heat under hood, not to mention pressure.
Aftermarket CAI's have shields, do they seal up against the hood? I never noticed..
Mmmm...Sonic, wish I had them around here.
. I cant say Im surprised by those numbers, but I didnt expect them that high from the stock box. Look where the stock box is getting air from, I would have expected a little cooler temps considering where its drawing air from.IMO, there's not much available fresh air where the stock box sits. Im sure most have looked from underneath and noticed that as well. The engine compartment (lack of heat extractor vents) holds alot of heat under hood, not to mention pressure.
Aftermarket CAI's have shields, do they seal up against the hood? I never noticed..
Mmmm...Sonic, wish I had them around here.
9/11/05, 06:38 PM
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Interesting Stuff. Where are you measuring the inlet air temp? I ask because if you are taking readings from the space between the air box & the fender opening, then the stock induction system itself would not be the source of the warmer air.
Can you rig a temp probe in the rubber boot in place of the breather tube? That would give you some pretty accurate numbers.
Can you rig a temp probe in the rubber boot in place of the breather tube? That would give you some pretty accurate numbers.
9/11/05, 07:05 PM
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Thanks. I guess I should have known that, but I don't have a tuner yet.
So your readings are coming from the space between the stock airbox and the HC trap, if you have one, or the molded intake tube if you don't.
In theory, then, if you insulated the inside of the stock airbox, you could reduce inlet temps.
Wonder why Ford didn't think of that.
So your readings are coming from the space between the stock airbox and the HC trap, if you have one, or the molded intake tube if you don't.
In theory, then, if you insulated the inside of the stock airbox, you could reduce inlet temps.
Wonder why Ford didn't think of that.
9/11/05, 07:34 PM
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RRRoamer . . . . thank you for base lining the stock system. The results leave me to wonder why Ford gave us such a turd of an intake system 
????
Alright . . . . let's cut to the chase . . . . . WMS Ram Air CAI owners . . . . anybody able to datalog yet??
????Alright . . . . let's cut to the chase . . . . . WMS Ram Air CAI owners . . . . anybody able to datalog yet??
9/11/05, 08:16 PM
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Who's next? It only took about 45 minutes or so and it was an excuse to go get a Route 44 Coke from Sonic! And because I had to let it warm up for 15 minutes, I went to the one that always has GREAT Cokes too!
I admit I wasn't surprised by the temps, but I WAS surprised by how SLOW the stock system cools back down. Real slow response time.
I also have to admit that I am not 100% sure WHERE the "inlet_air_temperatue" value is measured from. I assume it is the MAF, but I do NOT know this for sure. Does anyone (SCT, Bama, Brenspeed, etc) have a list of available signals and where they come from? It looks like a lot of signals are simply processed versions of the raw data. For example, there are two (at least) inlet air temperatures. One gives you the raw temp to a tenth of a degree. The other one only changes by 2 degree increments. Which one does the CPU actually use?
I admit I wasn't surprised by the temps, but I WAS surprised by how SLOW the stock system cools back down. Real slow response time.
I also have to admit that I am not 100% sure WHERE the "inlet_air_temperatue" value is measured from. I assume it is the MAF, but I do NOT know this for sure. Does anyone (SCT, Bama, Brenspeed, etc) have a list of available signals and where they come from? It looks like a lot of signals are simply processed versions of the raw data. For example, there are two (at least) inlet air temperatures. One gives you the raw temp to a tenth of a degree. The other one only changes by 2 degree increments. Which one does the CPU actually use?
9/11/05, 08:20 PM
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ManEHawke,
Personally, I would rather it stay here. The V6 and GT are different enough that it would definitely be comparing apples to oranges (oranges are better, by the way!). Also, the S197 performance forum is pretty dry. I know I never look there. I always go straight to the GT subform (and occasionally to the V6 forum to see what those guys are doing!). Needless to say, if the V6 guys want to take the idea and run, that would be great!
Personally, I would rather it stay here. The V6 and GT are different enough that it would definitely be comparing apples to oranges (oranges are better, by the way!). Also, the S197 performance forum is pretty dry. I know I never look there. I always go straight to the GT subform (and occasionally to the V6 forum to see what those guys are doing!). Needless to say, if the V6 guys want to take the idea and run, that would be great!