Intake air temp sensor

tjkoen01 · **Posted:** Thu Nov 16, 2006 1:30 pm

Has anyone relocated their incoming air temp sensor (air charge temp sensor) to the filter box?

When I had my Grand Cherokee and reading their forums, one mod that I did was to relocate the incoming air temp sensor in the air filter box (I actually left the original there and bought a new one to mount in the filter box). The sensor on the I-6 is mounted in the intake manifold right above the exhaust header. The theory was that the heat from the exhaust would heat the sensor, thus making the computer see warmer air and lean the fuel ratio out. With the 3.7L it's mounted in the plastic intake which doesn't conduct heat as well as the metal of the I-6, so I'm not sure that it would make too much of a difference. I have a data logger that records data from the computer and it shows that even on the highway, with my cold air intake that pulls air out of the factory air filter box with the lid on (I can get some pics if someone is interested), the air temp is still 120 degrees F and the outside temp is only 60.

KY Liberty · **Joined:** Sat Jul 09, 2005 1:46 pm **Posts:** 1195

Quote:

with my cold air intake that pulls air out of the factory air filter box with the lid on (I can get some pics if someone is interested), the air temp is still 120 degrees F and the outside temp is only 60.

I don't think a cone filter setup installed inside the factory air filter box is a cold air intake. With a proper cold air setup, you should be able to get very close to outside temp. Add a B&G flash to adjust the timing, fuel, and turn off the torque mangement, and you'll have a very noticeable difference.

kkkustom · **Joined:** Fri Sep 16, 2005 8:33 am **Posts:** 160

Stick it in the AC ducting! lol chill the sensor and the ecu will dump in more fuel! maybe

I dont think it will make a difference. I dont think that the ecu reacts substantially to the temp differences.

kkkustom · **Joined:** Fri Sep 16, 2005 8:33 am **Posts:** 160

also on that cold air stuff... the ambient temp in the engine compartment is so high that even the short path from an air box to the TB will cook the air very fast that’s why the temp is so high. Not to mention that the air bos still sucks the hot air from the engine compartment.

Get something that will accually take ALL of the incoming air from outside. and get it to the TB fast.

KY Liberty · **Joined:** Sat Jul 09, 2005 1:46 pm **Posts:** 1195

You need to quit trying to lie to the computer and get a ton of cold air through the intake.

This is my solution. It was expensive, but made the most performance difference out of all my mods other than when it's on the bottle.

tjkj2002 · **Posted:** Wed Jan 03, 2007 8:18 pm

Yeah that hood is on my very long list of "to get",$649 plus shipping,not to bad for a fiberglass hood(that's the price profinish gave when I called them).

KY Liberty · **Joined:** Sat Jul 09, 2005 1:46 pm **Posts:** 1195

It's really not a bad price. The hood is thick fiberglass. Most people don't realize it's fiberglass when they're looking at it. It just barely moves around at 65-75 mph even though it's catching a huge amount of air. They can make it with a larger opening in the bottom half right above where a cone intake sits like they made mine. Wasn't too hard to seal up the heat shield from the K&N FIPK against the hood, and on the bottom. With all that air coming from the scoop, and the air coming from the front, it actually creates a nice ram-air effect. You can actually feel it pulling air through the scoop even while at idle.

Boi1ermaker · **Joined:** Tue Jan 24, 2006 1:44 pm **Posts:** 249

This is the only other KJ hood i've found with a scoop. The profinish hood has a track record which is important; and its slightly less expensive. I already have a K&N FIPK and i don't think there's enough cool air getting to it, but i wanted a slightly less aggressive look. Any thoughts?

tjkj2002 · **Posted:** Sat Jan 06, 2007 4:13 pm

Quote:

Boi1ermaker

This is the only other KJ hood i've found with a scoop. The profinish hood has a track record which is important; and its slightly less expensive. I already have a K&N FIPK and i don't think there's enough cool air getting to it, but i wanted a slightly less aggressive look. Any thoughts?

That's not a bad looking hood,though I'm not to exicted about the cowl being raised(I live in a place with snow and it getting to relays located on the firewall is not to good).I really don't care about having cowl induction or a ram air, I just want a fiberglass hood to reduce my front end weight(I'm sitting at 5080lbs now and need the KJ to go on a little diet).

KY Liberty · **Joined:** Sat Jul 09, 2005 1:46 pm **Posts:** 1195

That's a nice looking hood, but it doesn't look like it will get any more cold air to the K&N FIPK because of the heat shield. The Profinish hood blows all the air from the scoop right on top of the cone filter.

jcphoto20 · **Joined:** Sun Nov 19, 2006 1:36 am **Posts:** 507

what does that hood scoop do in the rain and snow? do you have to get out and plug it and change something on your intake?

KY Liberty · **Joined:** Sat Jul 09, 2005 1:46 pm **Posts:** 1195

I don't have to do anything. I've never had any problems with water or snow, other than I tend to need to use FT 4WD or the rear end is all over the place.

FastTRX · **Posted:** Thu Mar 01, 2007 9:51 am

KY Liberty wrote:

I don't have to do anything. I've never had any problems with water or snow, other than I tend to need to use FT 4WD or the rear end is all over the place.

I know that feeling...mighty scary when it wants to pull to one side going down the highway at around 50 mph when its slushy/slippery/slightly snowy. It just takes a good break in traction and there is goes. Freaky... :shock:

jcphoto20 · **Joined:** Sun Nov 19, 2006 1:36 am **Posts:** 507

im curious as to how you have the scoop connected to your intake if its ramming straight in there and you have no problem with snow or rain.

KY Liberty · **Joined:** Sat Jul 09, 2005 1:46 pm **Posts:** 1195

It's not a complete ram-air. I only slightly modified the top edges of the heat shield to get it to seal against the hood better, and sealed up the bottom. The front of the heat shield is still open and allows air around the radiator. It appears to be giving a small ram-air effect, since the changes in efficiency were actually twice what we estimated from the temperature drop alone. If you put your hand in front of the scoop, you can actually feel it pulling air through it even with the front of the heat shield open. I've played with the idea of sealing the front of the shield up, but with the current setup, while potentially not giving quite as much benefit as a complete ram-air, doesn't have any problems with water or snow.

Intake air temp sensor

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