AEM EMS Series 2 Flex Fuel
08-02-2013, 08:43 PM
#1
AEM EMS Series 2 Flex Fuel
AEM is to release a new firmware for the Series 2 EMS in the coming week.
To get ready for the firmware update, I already received the 2000cc FID injectors (at an awesome price BTW).
Ordered the Continental Flex fuel sensor.
Sensor: http://www.gmpartsdirect.com/results...77394&tid=2616
Harness: http://www.gmpartsdirect.com/results...52241&tid=2616
SUB TOTAL: $74.16
SHIPPING: $19.28
TAX: $0.00
TOTAL WITH TAXES: $ 93.44
----------------------------------------------------
Taken from the AEM forum; the new firmware will allow for;
The new firmware will allow you to do one of two things:
1) Blend (0-100%) between two fuel maps (and O2 FB target maps), ignition maps, and two sets of boost target tables, based on flex fuel content as measured by a flex fuel sensor.
2) Fully select either the regular fuel and ignition maps and boost target tables or the "flex" fuel and ignition maps and boost target tables based on a switch input; basically a dual calibration feature.
----------------------------------------------------
The question is, where should I install the GM flex fuel sensor?
http://www.hondaautomotiveparts.com/...gry5=FUEL+PIPE
Thinking of putting it in between #27.
Removed the return line from the Fuel pressure regulator.
Measured and removed part of the return hose and attach the Flex sensor.
The Flex sensor installed to the hard line under the intake manifold. The sensor is secured with a zip tie to the surround wire harness. Plenty of room with no chaffing of other lines and wires.
The wire harness to the ecu.
Out to Signal (attached to pin D12 on EMS(switch 3). Gnd to Ground. Vcc to 12v switch.
Baseline run on E85 @ 17psi
My latest tune on E85 @ 25psi, 20 ignition timing.
To get ready for the firmware update, I already received the 2000cc FID injectors (at an awesome price BTW).
Ordered the Continental Flex fuel sensor.
Sensor: http://www.gmpartsdirect.com/results...77394&tid=2616
Harness: http://www.gmpartsdirect.com/results...52241&tid=2616
SUB TOTAL: $74.16
SHIPPING: $19.28
TAX: $0.00
TOTAL WITH TAXES: $ 93.44
----------------------------------------------------
Taken from the AEM forum; the new firmware will allow for;
The new firmware will allow you to do one of two things:
1) Blend (0-100%) between two fuel maps (and O2 FB target maps), ignition maps, and two sets of boost target tables, based on flex fuel content as measured by a flex fuel sensor.
2) Fully select either the regular fuel and ignition maps and boost target tables or the "flex" fuel and ignition maps and boost target tables based on a switch input; basically a dual calibration feature.
----------------------------------------------------
The question is, where should I install the GM flex fuel sensor?
http://www.hondaautomotiveparts.com/...gry5=FUEL+PIPE
Thinking of putting it in between #27.
Removed the return line from the Fuel pressure regulator.
Measured and removed part of the return hose and attach the Flex sensor.
The Flex sensor installed to the hard line under the intake manifold. The sensor is secured with a zip tie to the surround wire harness. Plenty of room with no chaffing of other lines and wires.
The wire harness to the ecu.
Out to Signal (attached to pin D12 on EMS(switch 3). Gnd to Ground. Vcc to 12v switch.
Baseline run on E85 @ 17psi
My latest tune on E85 @ 25psi, 20 ignition timing.
08-02-2013, 11:58 PM
#3
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Great news, switching from E85 to E75 without a remap, maybe even throw in E100 once in a while. 
A fresh test between different gas companies in Europe showed differences between what they advertised and the acutal ethanol percent in E85. The ethanol part got lower with additives and that might cause detonations if you tune on good E85. Even differences between shipments to the same gas station.
Just wish the did it by the wideband sensor instead, much more accurate. These things fail on OEM cars and you can guess what happens. Happy they did this, will use it anyway. 
A fresh test between different gas companies in Europe showed differences between what they advertised and the acutal ethanol percent in E85. The ethanol part got lower with additives and that might cause detonations if you tune on good E85. Even differences between shipments to the same gas station.
Just wish the did it by the wideband sensor instead, much more accurate. These things fail on OEM cars and you can guess what happens.
Happy they did this, will use it anyway.
