Megasquirt just another way to megasquirt your FD
08-29-13, 09:04 PM
#1
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just another way to megasquirt your FD
Hello everybody.
I'm using ms-2 on my FD more than year. Now it's running parallel with stock ecu. stock one controls solenoids, seq. boost, OMP, fan & AC. ms-2 controls idle, ignition & fuel.
So i'm plain to go standalone with ms-3.
My idea was not to buy complete ms3x + diybob adapter & make harness adaptor. I'm going to integrate MS-3 daughterboard inside stock ecu.
So i disassembled stock ecu & desoldered stock daughterboard, make my own ms-3 daughterboard adapter & assemble all this puzzle.
This is how is's looking:
also i added some extra onboard circuits - two EGT amplifiers, baro sensor (cause i do not have datasheet for stock nippindenso baro sensor), headphone socket for listening knock.
This project completed for 90%. engine first start will be soon.
I'm using ms-2 on my FD more than year. Now it's running parallel with stock ecu. stock one controls solenoids, seq. boost, OMP, fan & AC. ms-2 controls idle, ignition & fuel.
So i'm plain to go standalone with ms-3.
My idea was not to buy complete ms3x + diybob adapter & make harness adaptor. I'm going to integrate MS-3 daughterboard inside stock ecu.
So i disassembled stock ecu & desoldered stock daughterboard, make my own ms-3 daughterboard adapter & assemble all this puzzle.
This is how is's looking:
also i added some extra onboard circuits - two EGT amplifiers, baro sensor (cause i do not have datasheet for stock nippindenso baro sensor), headphone socket for listening knock.
This project completed for 90%. engine first start will be soon.
09-01-13, 07:19 PM
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First run:
not only tach. all stock signals (w\o air pump, and switching solenoids) controlled by ms now. Tacho, A/C, A/C shutoff, fan, OMP, double throttle, purge control, charge relief, charge control, turbo control, turbo precontrol, wasgtegate control - al this stuff wired to MS-3. also i have 4 spark outputs because i use ls-2 truck coils in RX-8 ignition mode.
one thing that do not controlled by software now - is OMP. i'm plaining to make patch for ms-3 firmware to support it.
complete look:
my proud is knock listening socket. i'm using extension cord to connect this socket in AUX in on car stereo. Volume up, and listening knock by car speakers very loud and very clean. this is awesome. no one digital knock meter can be so informative.
i sold my ms-2 because it have not enough (for me) I/O. and, yes, i want full sequential setup 
Pics of my previous ms-2:
one tip: black socket is cheap miata socket from diyautotune for 8$. it has only 3 connectors, but for ms-2 setup you will not need connector #2.
one thing that do not controlled by software now - is OMP. i'm plaining to make patch for ms-3 firmware to support it.
complete look:
my proud is knock listening socket. i'm using extension cord to connect this socket in AUX in on car stereo. Volume up, and listening knock by car speakers very loud and very clean. this is awesome. no one digital knock meter can be so informative.
Pics of my previous ms-2:
one tip: black socket is cheap miata socket from diyautotune for 8$. it has only 3 connectors, but for ms-2 setup you will not need connector #2.
09-02-13, 10:00 AM
#5
MegaSquirt Mod
Also keep in mind that the licence for using the ms3 states the MS3 can only be used with a B&G mainboard. Technically you are violating the license.
Ken
09-02-13, 07:02 PM
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I am already going to add OMP support in the next month or so. One thing to keep in mind is that the stepper controller on the ms3 may not be able to handle the current requirements of the OMP. The last time I looked into it the amount of current drawn by the OMP was right around the max the chip supported. On an OMP where the windings were at the low end of the spec for resistance, the chip might burn up.
I see. but i'm still using ms3 daughterboard. this is B&G Hardware too. Unfortunatly pure MS3+MS3X installs can not be used to fully replace fd3s ECU in sequential turbo setup. There are too many solenoids. unused injE,F,G,H channels + v3injA,B channels is not enought. you also will need to use unused spark outputs to control solenoids, but MS3X spark outputs too weak to control solenoids directly.
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05-10-15, 10:22 PM
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Also i've done with OMP code for MS3 source (years ago).
official MS3 firmware does not have it yet.
if someone interesting, i could share source here.
Last edited by vl-alexander; 05-10-15 at 10:28 PM.
05-11-15, 10:44 AM
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Yeah the pinouts between the two standard boards. I'd be very interested in the source. I am currently running a power fc but would be interested in running megasquirt in standard ECU housing.
05-12-15, 07:46 PM
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Code:
1A a1 1B +12V a2 5v. d21 12v 1E A/C sensor b5 1G ign tf c2 1H ign l c1 1J ign tr d3 1K fuel pump speed d15 1L A/C relay ic501[12] 1M Speed sensor b8 1O MAP a15 1Q Clutch pedal a6 1U Fuel temp b15 2B Tacho b14 2I heat hazard b3 2K 1st 2nd gear a9 2L 2nd gear b9 3A OMP position a18 3D FAN relay ic500[8] 3E CLT b17 3G TPS b16 3H sol. Purge cont d4 3I Vref c3,c4 3L IAT a16 3M knock c7 3N ign d16 ic501[9] 3O sol. double throttle a20 3P ign d15 ic501[1] 4C GND d10-12, c6,8 4E NE+ (tooth) d9,8 4G G+ (trig) d7 4I stepper.omp ta500 [d14] 4J stepper.omp ta500 [c13] 4K stepper.omp ta500 [d13] 4L stepper.omp ta500 [c12] 4M ign d14 c11 4N ign js11 ic500[7] 4Q IAC Ic510[7] 4R sol. Turbo contr d17 4S sol. Charge relief ic501[2] 4T sol. Charge cont ic500[6] 4U boost. WG d16 4V boost. Turbo prec c17 4W INJ. front prim d18 4X INJ. front sec c19 4Y INJ. rear prim d19 4Z INJ. rear sec c18
internal baro sensor on pin (b11) (1.04v=30kpa, 4.8v=125kpa)
Note: ta500 (Omp driver) is not just a set of 4 logic gates. If you want this "blackbox" drive only one output at any time, inputs must be set to 0b1000, 0b0010, 0b1110, 0b1011. sorry, but i cant remember acual byte order (which one - d14, or c12 is LSB)
also i am not sure about a2 pin. you should double check and find good 5v source, because, i remember, i had problems with some source, which can not provide enough current to drive MS3 daughterboard.
Last edited by vl-alexander; 05-12-15 at 07:54 PM.
05-13-15, 05:21 AM
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Thank You for that, It helps alot. how long did it take you to work out the pinouts? Did you eventually take the 5v source off the board or did you add an extra regulator?
05-13-15, 11:10 AM
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Yeah, i found 5v source somewhere on the board. just try to connect some load to every pin starting from a3, and check voltage drop.
just noticed, that pins 3N, 3P, 4M, 4N i marked as ignition one. but actually, this is some emission solenoids like Relief2, switching, and so...
I removed that solenoids, and use theese wires to drive COP by LS2 coils.
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