Engine management system comparison.
This will be the place to go when someone new to engine management wants all the information they can use to decide which management system is best for them. The first post contains non-tunable replacement ECUs, tunable piggy-backs, and tunable daughter-board solutions. The second page contains full, tunable stand-alone solutions that are specifically pared down to support 4-cylinder engines to reduce their cost (this is a new trend in EMS solutions). The third post contains full, tunable stand-alone solutions that are usually the flagship EMS solution of a brand. If you have information on one or more of the systems you'd like to add, or corrections for me, please post and I'll update accordingly.
General Notes:
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Jim Wolf Technology ECU:
Notes:
NON-TUNABLE factory ECU replacement. Tell them what injectors, MAF, etc. you plan on running and send in a core ECU. You will be sent back an ECU with a tuned program based on the engine components you plan on using.
Licensing:
Hardware is proprietary and closed source.
Firmware is proprietary and closed source.
Installation:
Plug-and-play. Swap your current ECU with the new one. Couldn't be easier.
Communication:
N/A (see notes)
Software Interface:
N/A (see notes)
Reliability/Known Issues:
Their tunes for low-boost, VET applications may be experimental or extremely conservative.
Finally dumping JWT - SR20 Forum
Cost:
$595 with core return. ($100 for each re-tune.)
Research Links:
JIM WOLF TECHNOLOGY, INC. / NISSAN PERFORMANCE / NISSAN RACING /INFINITI PERFORMANCE
(Official site)
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APEXi AFC (product range):
Notes:
Fuel piggy-back.
Allows for easy MAF swapping without the need for an external device (computer).
Licensing:
Hardware is proprietary and closed source.
Firmware is proprietary and closed source.
Installation:
A few wires intercept the ECU signals. Splicing the wires into your stock harness and go.
The device needs to following connections:
Communication:
Integral to the device (one dial and one button). No computer connection needed. No computer connection available.
Software Interface:
N/A (see above)
Reliability/Known Issues:
Stub.
Cost:
~$300-$400 (based on my short research)
Research Links:
Apex'i
(Official site)
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AEM Fuel / Ignition Controller (F/IC):
Notes:
Fuel and ignition piggy-back.
Licensing:
Hardware is proprietary and closed source.
Firmware is proprietary and closed source.
Installation:
Stub.
Reliability/Known Issues:
Stub.
Communication:
Stub.
Software Interface:
F/IC - x (free, closed source)
Cost:
$464.10
Research Links:
AEM
(Official site)
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MegaSquirt I:
Notes:
Fuel piggy-back.
Licensing:
Hardware PCB layout is proprietary and closed source.
Hardware schematics are proprietary and viewable source.
Firmware is proprietary and viewable source.
Installation:
Stub.
Communication:
Stub.
Software Interface:
TunerStudio MS Lite (closed source, free download)
TunerStudio MS Registered Edition (closed source, $49.95 download)
MegaTunix (open source, free download)
Reliability/Known Issues:
Cost:
$350 (pre-assembled)
$193 (assemble your own)
Pricing is from www.diyautotune.com
Research Links:
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Greddy e-Manage:
Notes:
Fuel and ignition piggy-back.
Licensing:
Hardware is proprietary and closed source.
Firmware is proprietary and closed source.
Installation:
Stub.
Communication:
Stub.
Software Interface:
Stub.
Reliability/Known Issues:
Stub.
Cost:
$379
Research Links:
Greddy - Founded and Driven by Racers
(Official site)
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Calum's Realtime Daughterboard:
Notes:
Calum has reverse engineered the stock ECU and created an emulator for it in the form of a daughterboard.
You get control of ignition and fuel maps, as well as a few other things such as rev limit.
Not a full featured stand-alone, but pretty close. Calum has stopped work on this project.
Licensing:
Hardware is proprietary and closed source.
Firmware is proprietary and closed source.
Installation:
Plug-and-play. Swap your current ECU with the new one. Couldn't be easier.
Communication:
RS232 or USB.
Software Interface:
TunerPro
Needs proper XDF (definition) files
The software used with PLMS/NIStune daughterboards also works with the Calum daughterboard, but is not the original software designed for this product. This is listed as an option, as it is confirmed to work:
NIStune (requires $171.76 single user license, closed source)
Reliability/Known Issues:
Stub.
Cost:
No longer available new.
Previous new unit pricing:
$120 for basic
$375 for OBDI Real Time (provide your own ECU)
$350 for OBDII Real Time (provide your own ECU)
Research Links:
CalumSult - SR20-Forum
(Calum's vendor specific section of this forum)
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NIStune Type 3 Real-Time:
Notes:
Nissan specific, tunable daughterboard similar to Calum's work but newer and still maintained.
Licensing:
Hardware is proprietary and closed source.
Firmware is proprietary and closed source.
Installation:
Solder the 40-pin connector to your factory ECU and call it a day.
Communication:
RS232 or USB adapter interfacing through the Consult port.
Software Interface:
NIStune (closed source, requires $171.76 single user license)
Reliability/Known Issues:
Stub.
Cost:
$188.94 Type 3 real-time board
$171.76 single user license
$85.88/$94.46 Consult cable (RS232/USB)
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$455.16 Total (with USB cable)
Pricing from www.plmsdevelopments.com
Research Links:
NIStune - Nissan Realtime ECU tuning
(Official site)
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NismoTronic RT Tuning Package
Notes:
Nissan specific, tunable daughterboard with onboard logging storage and ADC input channels built in.
Dave Dunn (dfddfd2) completely reversed engineered the OBDI ECU and defined all of the tunable items and documented how those tunable items work. This is the closest you can get to a standalone ECU with an OEM ECU.
NEMU RT is what they call the physical daughterboard. TunerCode is the firmware, and NismoTronic RT is the tuning software.
ADC break-out box also included for quick and easy wiring of 0-5v sensors for logging through the NEMU board. The ADC inputs are user configurable for logging in through the tuning software.
Licensing:
Hardware is proprietary and closed source.
Firmware is proprietary and closed source.
Installation:
Have them install the daughterboard in your ECU for you, for the price shown below.
Otherwise solder the 40-pin connector to your factory ECU and solder 3 wires from the NEMU RT daughterboard to your ECU connector pins.
Communication:
Standard USB connector.
Software Interface:
NismoTronic RT (single license included, closed source)
Reliability/Known Issues:
Stub.
Cost:
$550 (includes installing daughterboard into your actual ECU and return shipping)
or
$650 (no need to send in your ECU, they give you one)
Research Links:
http://www.NismoTronic.com
(Official site)
http://www.sr20-forum.com/nismotronic/
(NismoTronic's vendor specific section of this forum)
https://www.facebook.com/groups/145162022225980/
(Official Facebook group)
General Notes:
- To make sure everything fits I've limited the notes on each solution to be very minimal. For full specs and such, visit the official web sites as provided and do your own research.
- All prices listed are quoted directly from the manufacturer (MSRP) unless otherwise noted. Much cheaper prices for some systems can be found if you look around.
- Most systems can not charge coils directly, requiring stock "ignitors" (power transistors) or other types of switches. This is usually not a problem, but for those trying to run 2-wire COP you will have to find another way to charge the coils. Most systems recommend using a CDI box for this purpose, but if you don't want to run CDI you can make your own switching system instead. See the thread I made on the AEM forum for details on that method: Moved EMS from Nissan S13 to B13 with Honda COP - No spark. (Fixed!)
Research this aspect of your engine management system if you plan on running 2-wire COP.
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Non-tunable replacement ECU solutions
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.
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Jim Wolf Technology ECU:
Notes:
NON-TUNABLE factory ECU replacement. Tell them what injectors, MAF, etc. you plan on running and send in a core ECU. You will be sent back an ECU with a tuned program based on the engine components you plan on using.
Licensing:
Hardware is proprietary and closed source.
Firmware is proprietary and closed source.
Installation:
Plug-and-play. Swap your current ECU with the new one. Couldn't be easier.
Communication:
N/A (see notes)
Software Interface:
N/A (see notes)
Reliability/Known Issues:
Their tunes for low-boost, VET applications may be experimental or extremely conservative.
Finally dumping JWT - SR20 Forum
Cost:
$595 with core return. ($100 for each re-tune.)
Research Links:
JIM WOLF TECHNOLOGY, INC. / NISSAN PERFORMANCE / NISSAN RACING /INFINITI PERFORMANCE
(Official site)
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.
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.
.
.
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Tunable ECU piggy-back solutions
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.
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APEXi AFC (product range):
Notes:
Fuel piggy-back.
Allows for easy MAF swapping without the need for an external device (computer).
Licensing:
Hardware is proprietary and closed source.
Firmware is proprietary and closed source.
Installation:
A few wires intercept the ECU signals. Splicing the wires into your stock harness and go.
The device needs to following connections:
- Power
- Ground
- RPM
- Knock sensor
- Throttle position sensor
- MAF (or MAP) output
- MAF (or MAP) input
Communication:
Integral to the device (one dial and one button). No computer connection needed. No computer connection available.
Software Interface:
N/A (see above)
Reliability/Known Issues:
Stub.
Cost:
~$300-$400 (based on my short research)
Research Links:
Apex'i
(Official site)
.
.
.
.
.
.
.
AEM Fuel / Ignition Controller (F/IC):
Notes:
Fuel and ignition piggy-back.
Licensing:
Hardware is proprietary and closed source.
Firmware is proprietary and closed source.
Installation:
Stub.
Reliability/Known Issues:
Stub.
Communication:
Stub.
Software Interface:
F/IC - x (free, closed source)
Cost:
$464.10
Research Links:
AEM
(Official site)
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.
.
.
.
.
.
MegaSquirt I:
Notes:
Fuel piggy-back.
Licensing:
Hardware PCB layout is proprietary and closed source.
Hardware schematics are proprietary and viewable source.
Firmware is proprietary and viewable source.
Installation:
Stub.
Communication:
Stub.
Software Interface:
TunerStudio MS Lite (closed source, free download)
TunerStudio MS Registered Edition (closed source, $49.95 download)
MegaTunix (open source, free download)
Reliability/Known Issues:
- Prone to corrupting firmware if serial communications settings are wrong or serial ports are malfunctioning
Cost:
$350 (pre-assembled)
$193 (assemble your own)
Pricing is from www.diyautotune.com
Research Links:
- http://www.megasquirt.info/
(Official site) - DIYAutoTune.com Megasquirt Kits / Assembled Engine Management Systems, Wideband o2 Sensor Systems and tuning products
(Megasquirt vendor. Great place to buy sensors too)
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Greddy e-Manage:
Notes:
Fuel and ignition piggy-back.
Licensing:
Hardware is proprietary and closed source.
Firmware is proprietary and closed source.
Installation:
Stub.
Communication:
Stub.
Software Interface:
Stub.
Reliability/Known Issues:
Stub.
Cost:
$379
Research Links:
Greddy - Founded and Driven by Racers
(Official site)
.
.
.
.
.
.
.
Tunable daughterboard solutions
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.
.
Calum's Realtime Daughterboard:
Notes:
Calum has reverse engineered the stock ECU and created an emulator for it in the form of a daughterboard.
You get control of ignition and fuel maps, as well as a few other things such as rev limit.
Not a full featured stand-alone, but pretty close. Calum has stopped work on this project.
Licensing:
Hardware is proprietary and closed source.
Firmware is proprietary and closed source.
Installation:
Plug-and-play. Swap your current ECU with the new one. Couldn't be easier.
Communication:
RS232 or USB.
Software Interface:
TunerPro
Needs proper XDF (definition) files
The software used with PLMS/NIStune daughterboards also works with the Calum daughterboard, but is not the original software designed for this product. This is listed as an option, as it is confirmed to work:
NIStune (requires $171.76 single user license, closed source)
Reliability/Known Issues:
Stub.
Cost:
No longer available new.
Previous new unit pricing:
$120 for basic
$375 for OBDI Real Time (provide your own ECU)
$350 for OBDII Real Time (provide your own ECU)
Research Links:
CalumSult - SR20-Forum
(Calum's vendor specific section of this forum)
.
.
.
.
.
.
.
NIStune Type 3 Real-Time:
Notes:
Nissan specific, tunable daughterboard similar to Calum's work but newer and still maintained.
Licensing:
Hardware is proprietary and closed source.
Firmware is proprietary and closed source.
Installation:
Solder the 40-pin connector to your factory ECU and call it a day.
Communication:
RS232 or USB adapter interfacing through the Consult port.
Software Interface:
NIStune (closed source, requires $171.76 single user license)
Reliability/Known Issues:
Stub.
Cost:
$188.94 Type 3 real-time board
$171.76 single user license
$85.88/$94.46 Consult cable (RS232/USB)
--------------
$455.16 Total (with USB cable)
Pricing from www.plmsdevelopments.com
Research Links:
NIStune - Nissan Realtime ECU tuning
(Official site)
.
.
.
.
.
.
.
NismoTronic RT Tuning Package
Notes:
Nissan specific, tunable daughterboard with onboard logging storage and ADC input channels built in.
Dave Dunn (dfddfd2) completely reversed engineered the OBDI ECU and defined all of the tunable items and documented how those tunable items work. This is the closest you can get to a standalone ECU with an OEM ECU.
NEMU RT is what they call the physical daughterboard. TunerCode is the firmware, and NismoTronic RT is the tuning software.
ADC break-out box also included for quick and easy wiring of 0-5v sensors for logging through the NEMU board. The ADC inputs are user configurable for logging in through the tuning software.
Licensing:
Hardware is proprietary and closed source.
Firmware is proprietary and closed source.
Installation:
Have them install the daughterboard in your ECU for you, for the price shown below.
Otherwise solder the 40-pin connector to your factory ECU and solder 3 wires from the NEMU RT daughterboard to your ECU connector pins.
Communication:
Standard USB connector.
Software Interface:
NismoTronic RT (single license included, closed source)
Reliability/Known Issues:
Stub.
Cost:
$550 (includes installing daughterboard into your actual ECU and return shipping)
or
$650 (no need to send in your ECU, they give you one)
Research Links:
http://www.NismoTronic.com
(Official site)
http://www.sr20-forum.com/nismotronic/
(NismoTronic's vendor specific section of this forum)
https://www.facebook.com/groups/145162022225980/
(Official Facebook group)
Last edited by BenFenner
on 2012-05-10
at 13-50-48.