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Converting the car to speed density

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Old Dec 12, 2003 | 07:15 AM
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Converting the car to speed density

I am currently running the wiring for my setup and have searched the AEM forum for installing these sensors, but have come up empty. I was hoping someone that has installed these along with the EMS on an Evo could help me out.

IAT Sensor:

Did you mount it right before the TB, on the UIC pipe? Where did this wire into, a plug off of the wire harness in the engine bay or were wires run back to the EMS?

MAP Sensor:

Where is this mounted, intake pipe, UIC pipe? Where did this wire into, a plug off of the wire harness in the engine bay or were wires run back to the EMS?

Boost Sensor:

I plan on mounting it in the stock location under the intake. I have a new GM one and the stock one as well. If I left the stock one on there would I have to rewire anything? If I switch to the GM one, can I wire it into the stock boost sensor plug or does it have to be run back to the EMS as well?
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Old Dec 12, 2003 | 09:42 PM
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From: 2003 Evo VIII - Silver
IAT and MAP sesnors - you use the factory wires going into the factory sensors - I plumed both into the fmic pipe hear the throttle body

As for the boost thing you refer to - is that like a boost pick up ? why not just use the map sensor?

Thye aem looks like good stuff
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Old Dec 12, 2003 | 11:13 PM
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Al, shouldn't the MAP be on the intake manifold so you get both boost and vacuum readings? That is how I did it with my Haltech on the Galant VR-4.

I think the "boost thing" he is refering too is the boost control solenoid....but I am not sure. I came to that conclusion looking at his description of the location of the item.

Keith
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Old Dec 12, 2003 | 11:31 PM
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Done, not as hard as I thought. Followed a 2g eclipse off of the aem forum, nd some other help as well.

The boost control solenoid was screwy cuz the plug came with two white wires. Had to look on the solenoid to figure out which is positive.
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Old Dec 14, 2003 | 11:14 PM
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From: 2003 Evo VIII - Silver
Originally posted by Fourdoor
Al, shouldn't the MAP be on the intake manifold so you get both boost and vacuum readings? That is how I did it with my Haltech on the Galant VR-4.

I think the "boost thing" he is refering too is the boost control solenoid....but I am not sure. I came to that conclusion looking at his description of the location of the item.

Keith
Yeah your right - in the manifold on the MAP sensor !
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Old Dec 17, 2003 | 09:43 AM
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Here is the thread on the AEM forum that I used to convert the car to speed density.

http://forum.aempower.com/bbs/viewtopic.php?t=80

Evo wiring:

AIT sensor:

when looking at the MAF sensor plug in the engine bay, pin 5 and 6 going from left to right are the wires you tap into. The colors of one wire is black (pin 40) and the other is blue/red (pin 72). It doesn't matter which one is positive or negative on the sensor just wire it up using the two wires on the AIT sensor plug to pin 5 and 6 on the MAF sensor plug. Might want to double check if it can be wired this way, but I have heard this from many people. I will double check the sensor tonight to see if it has a positive sign on the sensor to distinguish the power supply.

MAP sensor:

you are going to want to tap into the MDP sensor as mentioned in the 2G install. It is on the top of the intake manifold closer the FPR. The three wires are black = ground (pin 91), grey = power (pin 81), and yellow = is the signal wire (pin 73). The AEM 3.5 bar map sensor i installed had a plug with a red = 5v power, green = output, and black = ground. Wire it black to black, red to grey, and yellow to green, if this is the sensor you use.

Boost control solenoid: Optional as you can use the stock one, but I don't know the specs on the stock one.

i used a GM soenoid, and when looking at the solenoid it has a plus sign on the plug housing which designates which wire is power and which is the signal. The plug harness I got with the unit had two wires so I had to look at the solenoid to figure it out. I used the plug in the engine bay that was used for the stock boost control solenoid (pin 11 = signal wire) and (pin 12 = is the power supply), can't remember the colors off of the top of my head. I think the red and white wire was the positive wire in pin 12. Just wire up pin 12 to the positive side of the solenoid plug and wire the other wire to pin 11 which is the signal and mount it in the stock location and you are done.


If anybody wants pics just let me know I will take pics for them.

Last edited by kcevo; Dec 17, 2003 at 09:51 AM.
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Old Dec 17, 2003 | 05:10 PM
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You bet your *** we want pics!

Keith
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Old Dec 17, 2003 | 05:32 PM
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You're using the MAP sensor with the E-manage? (Your registry info says nothing of an EMS which is why I ask) Curious how that'll go because it's the route I was originally going to go before I went standalone. Are you removing the MAF or running both? I'm sure Lancer and Evolution owners alike would like a little more info.

And yes, the ONLY place you'd really want a MAP sensor is in the manifold, and though I don't drive an Evolution my AIT sensor is on the intake about 18" before the TB. I hope you enjoy the new setup.
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Old Dec 17, 2003 | 05:38 PM
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I sold the e-manage a while back and bought the AEM unit. Haven't updated my mvehicle info in a while
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Old Dec 18, 2003 | 09:15 AM
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Congrats. Nice step up for you I hope.
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Old Aug 25, 2005 | 10:27 AM
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trying to bring this back from the dead....would love to get piqs of the three sensors wired up haha ANY HELP HERE.

Can anyone veryify the wiring that kcevo described is correct. Thanx in advance
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Old Aug 25, 2005 | 11:24 AM
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the wiring is correct as i have just got done doing it on another evo last week.

MAP sensor:

-- red from AEM sensor goes to grey from MDP sensor on top of manifold = 12v power
-- black from AEM sensor goes to black from MDP sensor = ground
-- white or green from AEM sensor (they now have a white wire but the instructions mention green) goes to yellow from the MDP sensor = signal


AIT sensor:

-- black wire from the maf plug and the red/blue wire from the maf plug are for the ait sensor. polarity does not matter, but if you have a white wire for the pigtail that is power and black is ground. You would hook black from the pigtail to the black wire from the maf sensor and the white wire from the pigtail will go to the red/blue wire from the maf sensor

Boost solenoid:

-- red/yellow wire is the 12v switched ignition power and the light green wire is the switched ground wire. Wire the positive side of the solenoid to the red/yellow wire and the ground side to the light green wire.
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Old Aug 25, 2005 | 11:32 AM
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thanks man, i already wired up my gm b/c sol. i just cot off the old conn. and soldered in the new one...there is another thread that we discussed it.....the new gm pigtail has two white wires and it seems that the solenoid doesnt' matter about the polarity.

with this info i can now wire up these last two sensors. Out of curosity did you solder your wires together or do you use crimp type connectors or the vampire conn. ?
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Old Aug 25, 2005 | 11:40 AM
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Originally Posted by manOfaith
thanks man, i already wired up my gm b/c sol. i just cot off the old conn. and soldered in the new one...there is another thread that we discussed it.....the new gm pigtail has two white wires and it seems that the solenoid doesnt' matter about the polarity.

with this info i can now wire up these last two sensors. Out of curosity did you solder your wires together or do you use crimp type connectors or the vampire conn. ?
I solder all my wires and haven'y used but connectors unless I absolutely have no other choice, especially wouldn't use them in the case of hooking up vital sensors like this. Recently I have found a guy locally that has a large supply of weatherpack connectors, pins, etc. that I have been disassembling the pigtails and making the connections directly at the plug w/o soldering or butt connectors.

If you look at the gm solenoid itself it has a positive symbol on one side of it while looking at the female plug side. It's hard to see, but it is there. That is the side I wired to red/yellow wire. It's probably not a big deal as you can invert the signal inside the AEM.
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Old Aug 25, 2005 | 11:41 AM
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From: PottsVegas, PA
air temp sensor:
Attached Thumbnails Converting the car to speed density-evo-001.jpg   Converting the car to speed density-evo-002.jpg  
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