AEM Ultimate Resource Thread>>>>

[FastOldGuy]

When using a AEM with speed density

Does any one know which Snow alky/water injection controller works best? The varable controller, or the MAFT controller?

Also when using the gauge type AEM wide band O2 Where does the white wire hook to? [Or how do you hook it up to run with the AEM] When the wide band is hooked into the AEM do you just unhook the regular O2 sensors?

[pengulns2001]

yes, you dont need your old O2 sensors, and you have to clarify what your talking about with that alky question "snow"??? "MAFT"??? if you have a maft thats not speed density

[mjannusch]

Originally Posted by decypher

Please forgive my ignorence, but i have a few questions. But what is a EBC or GM BC or 3.5 Bar AEM or 3.0 bar GM MAP Sensor and connector?? thanks in advance

EBC = Electronic Boost Controller
GM BC = General Motors Boost Solenoid (off a GMC Syclone or Typhoon)
3.5 Bar AEM = AEM's Manifold Pressure sensor, with a range of 3.5 bars (-1 bar vacuum to +2.5 bars boost compared to "ambient" pressure).
3.0 Bar GM MAP = GM's Manifold Pressure sensor, range from -1 bar to +2 bar (-14.7psi to +30 psi, roughly)


The AEM can control a boost solenoid, and the GM solenoid is a cheap option that supposedly works well. I still use my good ol' Hallman boost controller on my car. If you let the AEM control boost, you can do some additional things - like speed-based boost control, so you can have lower boost levels below 15 MPH and ramp up after that to get better traction on a FWD car, for instance.

[DDI]

Note you can also use an Apexi boost solenoid... Horsepower Freaks sell them seperately from the EBC kit. Wiring instructions are on the AEM forums.

[Renner]

Originally Posted by FastOldGuy

When using a AEM with speed density

Does any one know which Snow alky/water injection controller works best? The varable controller, or the MAFT controller?

Also when using the gauge type AEM wide band O2 Where does the white wire hook to? [Or how do you hook it up to run with the AEM] When the wide band is hooked into the AEM do you just unhook the regular O2 sensors?

The white wire from the AEM gauge type wideband is the 0-5V analog output. It should be run into the Lambda #1 input for the AEM. This is pin #56 for a 1st gen, and pin #76 for a 2nd gen. Make sure there are no other wires fed into this pin as it will alter the signal (iso cut the old signal wire). You can leave the 2nd O2 sensor hooked up but it will be basically useless anyway.

Use the O2 wizard to set the sensor type within the AEM software.

Then adjust the gain setting (with the sensor unhooked per the wideband instructions) so that the display and the AEM read the same values.

Also make sure the wideband gauge has a clean 12V signal and ground. After that you should be good to go.

[mjannusch]

Originally Posted by FastOldGuy

When using a AEM with speed density

Does any one know which Snow alky/water injection controller works best? The varable controller, or the MAFT controller?

Also when using the gauge type AEM wide band O2 Where does the white wire hook to? [Or how do you hook it up to run with the AEM] When the wide band is hooked into the AEM do you just unhook the regular O2 sensors?

Ugh. Hmmm...

Well, if you are hooking up a alky/water injection to the AEM you could probably use the nitrous configuration to trigger it and control it (and provide fuel offsets to the main fuel map if you want to reduce your injector flow while injecting lots of alcohol).

I assume the kit you are looking at is one of these:

http://www.snowperformance.net/products.asp?id=1

If the Snow kit can see a pulsewidth-modulated signal as a variable voltage, then you might want to use their MAF Variable Controller. You could probably set one of the AEM PWM outputs to send a duty cycle based upon load/RPM somehow and use their controller to control the water/alky flow.

I haven't done it, and haven't researched it - but I would guess you'd want to look in more detail on how that would work. The AEM forum folks might be able to help if you tell them specifically what you are trying to do and what items you want to use to accomplish it.

[decypher]

mjannusch Thankyou very much you summed that up very well so much so i understood it. Which is better 3.5 or 3.0. From what i understand from what you said i think the 3.0 is better for me because it reads in psi and not bars. Is that right?


JIm

[FastOldGuy]

Thanks Renner

Now who knows about which Snow ALKY/Controller to get for an AEM controlled car?

[mjannusch]

Originally Posted by decypher

mjannusch Thankyou very much you summed that up very well so much so i understood it. Which is better 3.5 or 3.0. From what i understand from what you said i think the 3.0 is better for me because it reads in psi and not bars. Is that right?

Well, it seems that most people prefer the AEM 3.5 bar because they feel that the accuracy is a bit better than the GM 3 bar sensor.

As far as psi vs. bar, it doesn't matter at all. The sensor just sends a variable voltage to the AEM. You tell the AEM whether you want to read pressure units as bar, psi, kg/cm^2 or whatever. All you really need to know is that the 3.5 bar sensor is good up to 35 psi of boost, and the 3 bar sensor is good to 30 psi. Either one should be enough for a 3/S unless you are going all-out on a large turbo setup, in which case the 3.5 will generally be sufficient. AEM also has a 5-bar MAP, if you are that kind of crazy.

[FastOldGuy]

Originally Posted by mjannusch

Ugh. Hmmm...

Well, if you are hooking up a alky/water injection to the AEM you could probably use the nitrous configuration to trigger it and control it (and provide fuel offsets to the main fuel map if you want to reduce your injector flow while injecting lots of alcohol).

I assume the kit you are looking at is one of these:

http://www.snowperformance.net/products.asp?id=1

If the Snow kit can see a pulsewidth-modulated signal as a variable voltage, then you might want to use their MAF Variable Controller. You could probably set one of the AEM PWM outputs to send a duty cycle based upon load/RPM somehow and use their controller to control the water/alky flow.

I haven't done it, and haven't researched it - but I would guess you'd want to look in more detail on how that would work. The AEM forum folks might be able to help if you tell them specifically what you are trying to do and what items you want to use to accomplish it.

Thanks mjannusch

The Snow MAF controller can see a 0-5 volt signal and can adjust flow to increase the alcohol injection the voltage increases from 0-5 volts. Can the AEM output a 0-5 volt based on a manifold presuure signal? In other words can it say: when the manifold pressure is 10psi put a output a voltage of 1 volt then when manifold pressure inceases to 11 psi then send an output voltage of 1.5 volts and keep increasing output voltage as Manifold presure increase all the way up to a maximum of 5 volts.

IN other words can the AEM vary its output votage 0-5volts base on the increasing MAP sign that it sees coming for the AEM MAP 3.5 sensor?