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Old July 15th, 2008, 09:53 AM   #1
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Intake Question

I heard a lot of people talking about moving a sensor into their cold air intakes. What does this do and how hard is it to do? I have a 05 accord sedan v6 with a kn intake and jpipe, test pipe, borla cat back, ur pulley. (maybe thermoblock spacers).

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Old July 15th, 2008, 12:11 PM   #2
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Don't mean to sound like a noob but...

What exactly are J-Pipes and Test Pipes??

And what gains/sound difference do u notice after install?
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Old July 15th, 2008, 01:06 PM   #3
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Lets try and answer both questions...

First off, the sensor you are referring to is (I think, but don't quote me on this) as the IAT Sensor. Basically, its a sensor that detects the temperature of the air coming into the throttle body and then fuel/mixture is adjusted accordingly. Now, there is a spot about 6 or so inches down the tube on the AEM V2 where you can put this sensor (and subsequently fill the hole in the throttle body with the bolt that was in your V2). The idea here is that the sensor will pick up slightly cooler temperatures being that much further removed from the heat of the engine. Colder temperatures = better performance. Are there gains? Realistically, probably not. But, it doesn't hurt either.

*EDIT: See number 11 on the diagram below



And, for the second question. The exhausts on the J30A4 (the engine in the 7th gen 3.0 V6 Accord) are tricky and kind of a pain in the ass. The "headers" portion of the exhaust is actually cast onto the block itself. (READ: Its all one piece, you cant take it off without damaging your block, or at least so I've heard). So, a pipe comes down from the front of the engine and through a small pre-cat for the front three cylinders, and one from the back and through a small pre-cat for the back three cylinders. Then they meet, go through the main catalytic converter, then split off into the "Dual" exhaust setup that the v6's have. Note that its not true dual exhaust, as our pipes do meet and then split back out again.

Now, the place where the pipes meet coming from the engine forms a little J, hence the name, j pipe. Rich has made a custom j pipe that allows for more airflow. It's bigger than the stock j pipe. A test pipe is basically just a straight pipe that replaces your main catalytic converter. Hope this helps.

*EDIT: J pipe is in the upper left hand corner of the diagram, number 8, and the test pipe would go where number 3 would go = more flow.

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Old July 15th, 2008, 02:23 PM   #4
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Nice description.

The OP has a K&N intake though, not an V2, so he'd have to drill a hole in the intake pipe, put in a rubber grommet and find the correct sized bolt to fill in the threaded hole on the throttle body where the IAT came out of to make it work. Too much work for little gain IMO.
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Old July 15th, 2008, 02:29 PM   #5
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Ha, I guess I just assumed he had the AEM v2.... whoops

we all know what assuming does
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Old July 15th, 2008, 04:30 PM   #6
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The IAT is where it is for a reason. The minimal gain in power will be offset with a minimal loss in fuel economy.
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Old July 15th, 2008, 04:54 PM   #7
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My fuel economy actually went up after install of the V2 so i don't know what you are talking about.
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Old July 15th, 2008, 06:02 PM   #8
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Yeah, I moved the IAT to the AEM V2 position and my gas mileage increased. It probably has more to do with the better air flow but either way moving it didn't decrease my MPG at all.
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Old July 15th, 2008, 07:17 PM   #9
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thanks for all of your responses and so quickly
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Old July 16th, 2008, 10:07 AM   #10
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Message to pbook4g5. Remember yesterday I mentioned that the aem v2 slowed me down. I spoke to aem about the IAT and they told me to leave it in the throttle body. So do you think if I install the IAT in the aem v2 pipe I might get my mph back. Last Sunday I just re-install the stock air box. Hope I will have a chance this weekend to try back the car to see if it make a difference.
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Old July 16th, 2008, 10:49 AM   #11
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Quote:
Originally Posted by Frank Silvestri View Post
Message to pbook4g5. Remember yesterday I mentioned that the aem v2 slowed me down. I spoke to aem about the IAT and they told me to leave it in the throttle body. So do you think if I install the IAT in the aem v2 pipe I might get my mph back. Last Sunday I just re-install the stock air box. Hope I will have a chance this weekend to try back the car to see if it make a difference.
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2004 Accord v6 coupe automatic
First off, I don't think it will make that big of a difference in either location, and secondly, I don't know why they would tell you to leave it in the throttle body if it says in their directions (under the words optional, yes) to move it to the tube. It only makes sense.
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Old July 16th, 2008, 03:32 PM   #12
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Quote:
Originally Posted by Accordian View Post
Yeah, I moved the IAT to the AEM V2 position and my gas mileage increased. It probably has more to do with the better air flow but either way moving it didn't decrease my MPG at all.
Quote:
Originally Posted by pbook4g5 View Post
My fuel economy actually went up after install of the V2 so i don't know what you are talking about.
This is like people saying they can feel the difference between hollow and solid cams...there's no difference worth nothing in changing the IAT by 5-10 degrees. Typically on a 75F day you'll have an IAT of about 100F in the throttle body and perhaps 90-95 upstream in the intake. The further downstream you go the more heat soak there is, especially with the aluminum intake and manifold.
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Old July 16th, 2008, 04:34 PM   #13
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^^Actually, I only said I could feel a difference after I installed the V2 itself. I didn't move the sensor over for a few months after, and, no, I didn't feel anything different.

Take time to read everything before you post, please.
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Old July 23rd, 2008, 09:21 PM   #14
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Quote:
Originally Posted by pbook4g5 View Post
^^Actually, I only said I could feel a difference after I installed the V2 itself. I didn't move the sensor over for a few months after, and, no, I didn't feel anything different.

Take time to read everything before you post, please.
Quote:
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My fuel economy actually went up after install of the V2 so i don't know what you are talking about.
IRONY. I was clearly talking about only the IAT relocation
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