Megasquirt Need help deciding what Megasquirt to use
11-27-07 | 06:00 PM
#1
Need help deciding what Megasquirt to use
Im finishing up my car and trying to decide what MS to use. I did some shopping around and noticed that there were two different ones available-MS1 and MS2 with different updates......MS2.3 and so on. I have a 1988 Rx7 turbo, emissions deleted and just looking to run the bare minimum, spark and fuel and the electric fan. Which MS will suit me best and is capable of controlling my car? Thanks to everyone in advance for the much needed advice.
Thank you,
Jose
Thank you,
Jose
11-28-07 | 11:45 PM
#6
This is starting to motivate to take pictures of what I did to mine, as well as what wires I move around in the db-37 connector. I modified and installed JasonDowney's MS-I ver 3.0 in his 89 turbo convertible and it started right up on the first crank and it drove pretty well.
Maybe I should do a walkthrough with pics on what I do, as well as what wires I switch around in the harness. Maybe I'll do the same for the software as well.
I should be modifying another MS-I ver 3.0 and installing it in jsnow82's '88 turbo within the next 2 weeks. I'm expecting the same result from his car.
Note: my experience is ONLY with the MS-I ver 3.0 with all the latest firmware and laptop software. Never touched a 2.2 or an MS-II yet.
Brian
Maybe I should do a walkthrough with pics on what I do, as well as what wires I switch around in the harness. Maybe I'll do the same for the software as well.
I should be modifying another MS-I ver 3.0 and installing it in jsnow82's '88 turbo within the next 2 weeks. I'm expecting the same result from his car.
Note: my experience is ONLY with the MS-I ver 3.0 with all the latest firmware and laptop software. Never touched a 2.2 or an MS-II yet.
Brian
11-28-07 | 11:55 PM
#7
if you're good with soldering circuit boards and you won't mind spending many days putting it together, then build it. I personally built mine about 2 and a half years ago, but if I had the choice again, I would much rather have spent the extra $$ and bought it prebuilt from diyautotune.com.
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11-29-07 | 12:19 AM
#8
Banned. I got OWNED!!!
Joined: Dec 2006
Posts: 26
Likes: 1
I haven'treally searched this subforum but if there aren't any instructions or things needed for initial startup or setup then you should post it. I know I'd appreciate it. As far as installation, well, it seems like you use the same MSI but you swap in the new MSII card for 89 bux, so the what you do with the MSI will most likely work on the MS2. Right?
here is what the MSII is about:
Completely assembled including:
* All 'Basic Components'
* PWM Flyback Damping Circuit components
* Hall Sensor/Coil(-) and VR Sensor Ignition Trigger Components (jumpered for Hall sensor, optical sensor, points, or fuel only using negative coil input- you can reconfigure for any input you like)
* Current Limiting Circuit Components
* Also includes solder-cup DB37 and DB15 with clamshells for building your own harness
Features / Benefits of all MegaSquirt EFI Systems
* Onboard MAP sensor for NA or boosted engines up to 21psi! (Upgradeable to 44psi)
* Speed density or Alpha-N.
* Use any injector - High or Low impedance.
* Compatible with output from narrowband and wideband O2 sensors.
* Log data on your laptop for later analysis.
* Tuning software is free for download and regularly updated with new features.
* Open Source design - all code and hardware information is available online.
* Includes proper female DB37 and DB15 connectors and shells for building your wiring harness.
* Professionally Machined Brushed Aluminum Case with Endplates. Excellent Fit and Finish! Flanged for easy mounting.
* Supports use of original MS tach input, ignition coil triggering, VR, Hall and Optical sensor triggering.
Additional Features new to the MegaSquirt-II Processor
* 24 MHz HCS12 processor
* Fuel control to 1 µsec (100 times more resolution than MegaSquirt-I)
* Ignition control (full spark timing advance control, dwell control, etc) for one coil/distributor (7 pin HEI for example) and Ford's EDIS systems
* On-board stepper motor driver for IAC stepper control (we install the jumpers for this by default)
* Ford PWM idle valve firmware support
* Built-in rev limiter, either 'fuel cut' or 'spark retard'
* All tables are now 12×12 in size
* WBO2 AFR target table (in AFR units)
* Independent dual-tables for VE and AFR target
* EGO feedback in wide-band mode is proportional to the difference between the measured AFR and the target AFR, the bigger the difference, the bigger the feedback step
* Spark advance table can have different rpm and kpa bins than VE and AFR tables
* 115,200 baud serial interface with MegaTune2.25+
* CANbus networking
* Barometric correction amount and direction configurable in software, and provisions for:
o barometric correction based on initial MAP reading,
o independent 2nd barometric MAP sensor for continuous real-time baro correction, or
o no baro correction.
* TPS values for open loop and flood clear mode are user configurable
* MAP based open loop can be set as well as TPS
* Both TPS and MAP based accel enrichment is built into the code, you can configure the ratio of each
* Blended Alpha-N and speed density is an option
* 2 spare I/O lines for custom controls. (This is in addition to 4 lines for Idle stepper control if you don't need this, or the Fast idle solenoid then becomes a spare if you do use a stepper motor.)
New Features specific to the latest PCB Version 3.57 Surface Mount PCB
* 90% of components converted to surface mount. This standardizes the part numbers used, as well as the assembly process, resulting in consistently high quality. (I know you were already used to that from us here at DIYAutoTune
* All standard ignition input setting are now easily set by jumper shunts, no need to bust out your soldering iron to change your base hardware ignition configuration anymore!
* Pulse-Width Modulated (PWM) Idle Valves are now natively supported by the PCBv3.57 hardware without the need for modification. This is one of the coolest features as this was a very common modification that will no longer be needed. The circuitry on the PCBv3.57 will control a standard on/off fast idle valve, or a 2/3 wire PWM Idle valve!
* Enhanced I/O Capabilities
o DB15 Added for bringing signals into/out of the ECU
o Common signal pickup points (IE 'top of the LEDs, etc') are brought out to easily accessible solder pads
* LEDs are surface mounted
here is what the MSII is about:
Completely assembled including:
* All 'Basic Components'
* PWM Flyback Damping Circuit components
* Hall Sensor/Coil(-) and VR Sensor Ignition Trigger Components (jumpered for Hall sensor, optical sensor, points, or fuel only using negative coil input- you can reconfigure for any input you like)
* Current Limiting Circuit Components
* Also includes solder-cup DB37 and DB15 with clamshells for building your own harness
Features / Benefits of all MegaSquirt EFI Systems
* Onboard MAP sensor for NA or boosted engines up to 21psi! (Upgradeable to 44psi)
* Speed density or Alpha-N.
* Use any injector - High or Low impedance.
* Compatible with output from narrowband and wideband O2 sensors.
* Log data on your laptop for later analysis.
* Tuning software is free for download and regularly updated with new features.
* Open Source design - all code and hardware information is available online.
* Includes proper female DB37 and DB15 connectors and shells for building your wiring harness.
* Professionally Machined Brushed Aluminum Case with Endplates. Excellent Fit and Finish! Flanged for easy mounting.
* Supports use of original MS tach input, ignition coil triggering, VR, Hall and Optical sensor triggering.
Additional Features new to the MegaSquirt-II Processor
* 24 MHz HCS12 processor
* Fuel control to 1 µsec (100 times more resolution than MegaSquirt-I)
* Ignition control (full spark timing advance control, dwell control, etc) for one coil/distributor (7 pin HEI for example) and Ford's EDIS systems
* On-board stepper motor driver for IAC stepper control (we install the jumpers for this by default)
* Ford PWM idle valve firmware support
* Built-in rev limiter, either 'fuel cut' or 'spark retard'
* All tables are now 12×12 in size
* WBO2 AFR target table (in AFR units)
* Independent dual-tables for VE and AFR target
* EGO feedback in wide-band mode is proportional to the difference between the measured AFR and the target AFR, the bigger the difference, the bigger the feedback step
* Spark advance table can have different rpm and kpa bins than VE and AFR tables
* 115,200 baud serial interface with MegaTune2.25+
* CANbus networking
* Barometric correction amount and direction configurable in software, and provisions for:
o barometric correction based on initial MAP reading,
o independent 2nd barometric MAP sensor for continuous real-time baro correction, or
o no baro correction.
* TPS values for open loop and flood clear mode are user configurable
* MAP based open loop can be set as well as TPS
* Both TPS and MAP based accel enrichment is built into the code, you can configure the ratio of each
* Blended Alpha-N and speed density is an option
* 2 spare I/O lines for custom controls. (This is in addition to 4 lines for Idle stepper control if you don't need this, or the Fast idle solenoid then becomes a spare if you do use a stepper motor.)
New Features specific to the latest PCB Version 3.57 Surface Mount PCB
* 90% of components converted to surface mount. This standardizes the part numbers used, as well as the assembly process, resulting in consistently high quality. (I know you were already used to that from us here at DIYAutoTune
* All standard ignition input setting are now easily set by jumper shunts, no need to bust out your soldering iron to change your base hardware ignition configuration anymore!
* Pulse-Width Modulated (PWM) Idle Valves are now natively supported by the PCBv3.57 hardware without the need for modification. This is one of the coolest features as this was a very common modification that will no longer be needed. The circuitry on the PCBv3.57 will control a standard on/off fast idle valve, or a 2/3 wire PWM Idle valve!
* Enhanced I/O Capabilities
o DB15 Added for bringing signals into/out of the ECU
o Common signal pickup points (IE 'top of the LEDs, etc') are brought out to easily accessible solder pads
* LEDs are surface mounted
Last edited by phoenix7; 11-29-07 at 12:27 AM.
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