New AEM Piggyback (Seems VERY promising)
There is gl@ss in my @SS...Joined: Apr 2005
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Re: New AEM Piggyback (Seems VERY promising)
Damn man, this thing is awesome, and the partial throttle response that has caused so much trouble seems to go away.
Also found this little note.
Modern ECU's stay in closed loop at partial throttle and that can cause the problem you are noting. This is also present on turbocharged cars at very light boost on the highway. The factory tries to control to 14.7:1 AFR but the engine is under pressure so it should be run richer. Simply adding fuel wont work as the closed loop feedback from the O2 sensor will remove the fuel and store the correction in it's long term trims. Basically, the newer the car, the bigger the problem as threy stay in feedback under higher and higher loads.
The F/IC has the ability to Skew the O2 sensors. We dont intercept them, we tap into them and bias the signal to force the ecu to add (or remove) fuel. Since this allows the engine to still operate in closed loop, you are having the ECU do the work for you. The ECU increases the pulsewidth to add the fuel itself.
Also found this little note.
Modern ECU's stay in closed loop at partial throttle and that can cause the problem you are noting. This is also present on turbocharged cars at very light boost on the highway. The factory tries to control to 14.7:1 AFR but the engine is under pressure so it should be run richer. Simply adding fuel wont work as the closed loop feedback from the O2 sensor will remove the fuel and store the correction in it's long term trims. Basically, the newer the car, the bigger the problem as threy stay in feedback under higher and higher loads.
The F/IC has the ability to Skew the O2 sensors. We dont intercept them, we tap into them and bias the signal to force the ecu to add (or remove) fuel. Since this allows the engine to still operate in closed loop, you are having the ECU do the work for you. The ECU increases the pulsewidth to add the fuel itself.
Re: New AEM Piggyback (Seems VERY promising)
An updated F/IC wiring diagram for the 7th gen has been posted on the AEM forum. A resistor has been added inline with the O2 sensor for better AFR spoofing.
http://forum.aempower.com/forum/inde...c,20029.0.html
http://forum.aempower.com/forum/inde...c,20029.0.html
Last edited by DelSolid; Jun 15, 2007 at 12:35 PM.
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From: Portsmouth, Ohio
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That's what i just posted lol on page 4. lol good looking out though DelSolid
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From: Portsmouth, Ohio
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ah ok, i just got it yesterday and i wasn't aware they updated since yesterday, good looking out!!!
A long winded 7th genr
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From: Northern California Humboldt
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This is all very exciting stuff. I'm really glad AEM is out there keepin it real!
Yo Dezod,
Are you thinking about offering this in your kit instead of the standalone EMS?
Yo Dezod,
Are you thinking about offering this in your kit instead of the standalone EMS?
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From: Portsmouth, Ohio
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i'm sure it will just be another option on the drop down menu for EMS's in the S1 kit. the S2 kit is big dawg kit and runs the AEM Standalone.
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From: Portsmouth, Ohio
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When will the plug and play be available to us? I want to pick that up and get this thing. Just Need my Race Manifold and the AEM F/IC and i'm good to go.
Registered!!
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Re: New AEM Piggyback (Seems VERY promising) 
Joined: Aug 2003
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From: Las Vegas, NV
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go to boomslang's website.. they got it there.. i was thinking the same thing (about going to dezod's site) when i saw the PnP harness, then i remembered about boomslang.. its $209 shipped
Joined: Aug 2003
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From: Las Vegas, NV
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cheapest place i found it is at jegs.. and last i saw, they still offer free shipping.. it's 409 at dezod and 397.99 at jegs
http://www.jegs.com/webapp/wcs/store...0002_874633_-1
http://www.jegs.com/webapp/wcs/store...0002_874633_-1
Joined: Apr 2005
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From: Portsmouth, Ohio
Rep Power: 321 Re: New AEM Piggyback (Seems VERY promising)
Can you plug the AEM UEGO into the AEM F/IC and log the A/F on to the computer?
Thread Starter
7thgen Power Maker
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Thread Starter
7thgen Power Maker
iTrader: (74)
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From: Buffalo, NY, US
Rep Power: 0 Re: New AEM Piggyback (Seems VERY promising)
That's a shock to hear. I figured that would have been a major selling point. That's a necessity when tuning, unless you want to use a dyno's probe a/f sensor or the tuner has an FJO or something similar.
