556:
specific features for boost control, water injection, fan control, nitrous control etc., MS-III can control distributors or EDIS ignitions and decode a wide range of OEM toothed crank and cam wheels. Additional features includes enhanced transient enrichment compensation (X-Tau and EAE acceleration enrichment), enhanced closed-loop mixture control with wide band sensor AFR targeting, closed loop idle control, various types of rev-limiting, MAP/MAF/alpha-N fuel control, injector and coil test mode, crank/cam input diagnostics, SDcard datalogging, flex fuel (gasoline/E85) with appropriate sensor, LPG support, and many more.
522:
functions (Automatic
Mixture Control - AMC), and fuel control to 1 μs (100 times more resolution than MegaSquirt-I). MS-II can control distributors or EDIS ignitions and decode many standard toothed crank wheels. Additional features includes X-Tau transient enrichment compensation (acceleration enrichment), nitrous control with fuel and spark adjustments, enhanced closed-loop mixture control w/ wide band sensor AFR targeting, two types of rev-limiting, MAP/MAF/alpha-N fuel control, injector test mode, flex fuel (gasoline/E85) with appropriate sensor, and many more.
484:
programmable outputs, water injection and more to MegaSquirt. Hardware modifications are required to run ignition and the learning curve is steeper than a fuel-only implementation, but many hundreds of users use the "MS1/Extra" firmware. The firmware was very actively developed and is now a stable alternative to the base MS code. Most MegaSquirt vendors ship the MS1/Extra firmware as standard on MS1 boards. The firmware is designed to operate using either a supported ignition system, such as GM HEI, or
22:
504:, an engineer and Suzuki enthusiast better known by his nickname Caaarlo. The wheel decoder is tailored to read the very particular pattern of the camshaft encoder wheel found in the Suzuki G13B engine that powers the Suzuki Swift GTi, GT and Cultus GTi. It also generates the adequate PWM frequency for the factory Idle Solenoid, avoiding the need for generic toothed wheels and idle valves.
444:. The boards are meant for those unable or unwilling to assemble their own main board. Note that the V3.57 board is not a replacement for the "build-it-yourself" boards, but rather an additional version of the MegaSquirt main board intended to make life easier for distributors who are building their boards for resale, to compete with mainstream ECU suppliers.
483:
MS1/Extra is a firmware modification to the original
Bowling and Grippo MegaSquirt written by Philip Ringwood and James Murray (with contributions from many more). As the name implies it adds ignition management, as well as a large number of other features such as boost control, nitrous, fan control,
354:
As the product line of Engine
Management Systems has evolved through multiple hardware and firmware revisions, at least when referring to the Legacy/DIY oriented MegaSquirt Systems (kit type ECUs) it is difficult to be specific about the capabilities of any particular MegaSquirt without knowing three
447:
Although this board uses surface-mount components, the layout is the same as in the V3 main board, apart from the omission of the DIY-oriented prototype area (the 3.57 is not meant to be a DIY board, of course). Component numbering remains the same in nearly all cases. In fact, this board version
448:
started with the V3 main board, and maintains the 4-layer construction and power distribution. It is the same size (4" x 6") and the connectors are in the same places, so it fits in the standard case with no modifications (though some modifications may be necessary for additional functionality).
537:
This is an extension of the base code, adding many of the much needed MS1/Extra features to the MS-II chip. Enhancements include wide support for OEM crank/cam wheels, wasted spark and COP ignition, closed loop idle, EAE, boost control, nitrous control and many other features. Latest test codes
555:
This is the default MS3 code that you can load onto your MS-III board. The code has (multiple) 16x16 fuel and spark tables, support for up to V8 sequential fuel and spark, stepper IAC control, 2 or 3 wire PWM idle valve control, fuel control to 1 μs, several user-configurable spare ports,
521:
This is the default Al Grippo code that you can load onto your MS-II board. The code has (multiple) 12x12 fuel and spark tables, stepper IAC control, PWM idle valve control, several user-configurable spare ports (for things like boost control, water injection, fan control, etc.), self-tuning
469:
This is the default pre-loaded code from
Bowling and Grippo. It is a simple and effective fuel injection controller with an 8x8 fuel table for speed density or alpha-n. Narrow band or wide band oxygen sensors can be used for closed loop control, and an on/off idle valve may be
439:
is a surface-mount device (SMD) version of the MegaSquirt V3 "thru-hole" main board. The 3.57 version of the board was created in order to allow for automated assembly of the majority of components using automated pick and place (machine assembly) and
310:
Refined
Engineering and Packaging of MS3 creating a Ready to Use Standalone Engine Management system less targeted at the DIYer and more at the amateur/semi-pro racer. Turning MegaSquirt DIY technology into a Premium Standalone EMS.
419:
since 2002. Instead, vendors resell the
Bowling and Grippo offerings, and they keep stock current, so all items are normally available at all times. There is a list of vendors in the megamanual. Starting in July 2005, the
306:
Extension of MS2, V8 sequential fuel and spark, many more i/os. Wide range of OEM crank/cam wheels supported. Many racing features built in. Onboard USB-serial, SD card datalogging. See the detailed cross reference.
103:
The
Megasquirt's predecessor was the EFI332 project, led by Bruce Bowling and Al Grippo. EFI332 development started around 1999 and culminated in the release of about 200 kits in 2000. The system used a 32-bit
383:, and is a step up from the original MC68HC908 processor MegaSquirt. The current Megasquirt-III uses a 16bit MC9S12XEP100 processor running at 50 MHz which includes a 100 MHz RISC core.
347:, Crankshaft Position Sensor, optional Camshaft Position Sensor, Intake Air Temperature sensor (IAT), and a Coolant Temperature Sensor (CLT). The default calibration is configured to match common
572:
The source code of the firmware(s) are available to download for peer review and end-user modification, but the code and derivatives are only licensed for use on official
Megasquirt hardware.
367:
versions. As for the commercial/refined MS3Pro and MSPNP lines, this is far simpler as these systems were engineered to 'just work' and not aimed at the DIYer.
297:
More precise fuel control, Ignition
Control, CAN Bus, GPIO, Inexpensive, User Spare Output Ports, Automatic Mixture Control, Flex fuel (E85) abilities
379:
microcontroller, and all versions of the main board support this processor. The later MegaSquirt-II processor upgrade daughter card includes a 16-bit
118:
The designers then decided to simplify the EFI332 design, and focus on managing the fuel injectors (the EFI332 was also designed to control the
303:
Single card complete MS2 based ECU designed to be used as the basis of an ECU of the user's creation. Includes firmware license.
488:, or it can decode certain trigger wheel signals from crank/cam sensor pickups and directly run wasted spark or coil on plug.
64:
763:
115:. A very steep coding, electronic design, and tuning curve prevented the system from gaining wider acceptance.
569:
The hardware designs and application firmware are copyrighted by
Bowling & Grippo and subject to patents.
328:
The assembled controller takes input from several sensors in order to manage the fuel injectors, including a
643:
317:
For a more detailed cross-reference of the features available within the MegaSquirt range of products, see
351:
type, although the controller can easily be recalibrated to use nearly any sensor on nearly any engine.
424:
PCB was made available to use some of the advanced features of the MegaSquirt-II. As of August 2007, the
46:
348:
88:
84:
37:
329:
81:
300:
Same Features as MS-II, plus Small Size, Sealed case, Dual Ignition/Injection Channels, Assembled
396:
360:
8:
538:
support 4 cyl sequential fuel. Code is licensed for use on genuine B&G products only.
32:
415:
printed in the upper left corner of the PCB. MegaSquirt ECU's have not been sold by
122:
ignition system if so desired). This was the basis for the first MegaSquirt (MS-I).
441:
380:
376:
501:
356:
108:
105:
727:
757:
336:
92:
685:
657:
318:
42:
Many sections are like an instruction manual and some close to advertising.
333:
87:(EFI) controller designed to be used with a wide range of spark-ignition
344:
119:
565:
The licensing surrounding Megasquirt has at times been misunderstood.
500:
MS1/Custom Suzuki G13B is a firmware modification to the MS1/Extra by
699:
485:
416:
404:
392:
575:
The success of Megasquirt has spawned a number of unlicensed clones.
364:
239:
112:
95:.) MegaSquirt was designed by Bruce Bowling and Al Grippo in 2001.
606:
592:
671:
399:
for the original MegaSquirt-I was in 2001. These boards are
407:
in 2002, as well as all following purchases until 2005 are
267:
748:
713:
743:
714:"US Patents 7,421,329 ; 7,369,933 ; 7,313,474"
629:
403:
main boards, and are no longer available. The second
125:The MegaSquirt was launched on September 15, 2001.
375:The version 1.0 MegaSquirt used an 8-bit Motorola
525:See the Megamanual for download and documentation
755:
728:"Megasquirt clones, copies and counterfeits"
542:
749:MegaSquirt product information and support
508:
456:
435:There is a newer version of the PCB. The
65:Learn how and when to remove this message
700:"MegaSquirt EFI Licenses and Copyrights"
692:
664:
624:
622:
386:
678:
650:
756:
720:
706:
636:
619:
585:
15:
560:
128:
13:
593:"Original EFI332 Project Homepage"
370:
319:MegaSquirt product cross reference
228:50 MHz (+100 MHz XGATE)
225:50 MHz (+100 MHz XGATE)
14:
775:
744:Original MegaSquirt support forum
737:
294:Depends on firmware, Inexpensive
20:
599:
1:
579:
432:boards are still available.
7:
672:"MegaSquirt MSEXTRA Suzuki"
478:(MegaSquirt 'n Spark-Extra)
451:
323:
89:internal combustion engines
40:. The specific problem is:
10:
780:
256:1024 kB + 32kB data flash
253:1024 kB + 32kB data flash
98:
85:electronic fuel injection
543:Firmware for MS-III chip
411:main boards, and have a
330:throttle position sensor
509:Firmware for MS-II chip
178:2012 (updated in 2017)
764:Fuel injection systems
686:"MegaSquirt MS2/EXTRA"
607:"History | MegaSquirt"
494:MS1/Custom Suzuki G13B
457:Firmware for MS-I chip
397:printed circuit boards
387:Printed Circuit Board
361:printed circuit board
80:is a general-purpose
658:"MegaSquirt MSEXTRA"
549:standard MS-III code
463:standard V3.000 code
203:16-bit MC9S12XEP100
200:16-bit MC9S12XEP100
47:improve this article
36:to meet Knowledge's
515:standard MS-II code
147:MicroSquirt module
644:"MS3Pro Features"
630:"MS3EFI Homepage"
502:Sebastian Giroldi
315:
314:
197:16-bit MC9S12C64
194:16-bit MC9S12C64
191:16-bit MC9S12C64
75:
74:
67:
38:quality standards
29:This article may
771:
732:
731:
724:
718:
717:
710:
704:
703:
696:
690:
689:
682:
676:
675:
668:
662:
661:
654:
648:
647:
640:
634:
633:
626:
617:
616:
614:
613:
603:
597:
596:
589:
561:Licensing issues
442:reflow soldering
188:8-Bit MC68HC908
133:
132:
129:Current Products
70:
63:
59:
56:
50:
24:
23:
16:
779:
778:
774:
773:
772:
770:
769:
768:
754:
753:
740:
735:
726:
725:
721:
712:
711:
707:
698:
697:
693:
684:
683:
679:
670:
669:
665:
656:
655:
651:
642:
641:
637:
628:
627:
620:
611:
609:
605:
604:
600:
591:
590:
586:
582:
563:
545:
511:
459:
454:
389:
373:
371:Microcontroller
357:microcontroller
342:
326:
150:Megasquirt III
131:
109:microcontroller
101:
71:
60:
54:
51:
44:
25:
21:
12:
11:
5:
777:
767:
766:
752:
751:
746:
739:
738:External links
736:
734:
733:
719:
705:
691:
677:
663:
649:
635:
618:
598:
583:
581:
578:
577:
576:
573:
570:
562:
559:
558:
557:
552:
551:
544:
541:
540:
539:
534:
533:
531:MS2/Extra code
527:
526:
523:
518:
517:
510:
507:
506:
505:
497:
496:
490:
489:
480:
479:
472:
471:
466:
465:
458:
455:
453:
450:
388:
385:
372:
369:
349:General Motors
340:
325:
322:
313:
312:
308:
304:
301:
298:
295:
292:
286:
285:
282:
279:
276:
273:
270:
264:
258:
257:
254:
251:
248:
245:
242:
236:
230:
229:
226:
223:
220:
217:
214:
211:
205:
204:
201:
198:
195:
192:
189:
186:
180:
179:
176:
173:
170:
167:
164:
161:
155:
154:
151:
148:
145:
142:
141:MegaSquirt II
139:
136:
130:
127:
100:
97:
93:diesel engines
73:
72:
28:
26:
19:
9:
6:
4:
3:
2:
776:
765:
762:
761:
759:
750:
747:
745:
742:
741:
729:
723:
715:
709:
701:
695:
687:
681:
673:
667:
659:
653:
645:
639:
631:
625:
623:
608:
602:
594:
588:
584:
574:
571:
568:
567:
566:
554:
553:
550:
547:
546:
536:
535:
532:
529:
528:
524:
520:
519:
516:
513:
512:
503:
499:
498:
495:
492:
491:
487:
482:
481:
477:
474:
473:
468:
467:
464:
461:
460:
449:
445:
443:
438:
433:
431:
427:
423:
418:
414:
410:
406:
402:
398:
394:
384:
382:
378:
368:
366:
362:
358:
352:
350:
346:
338:
337:oxygen sensor
335:
331:
321:
320:
309:
305:
302:
299:
296:
293:
291:
288:
287:
283:
280:
277:
274:
271:
269:
265:
263:
260:
259:
255:
252:
249:
246:
243:
241:
237:
235:
232:
231:
227:
224:
221:
218:
215:
212:
210:
207:
206:
202:
199:
196:
193:
190:
187:
185:
182:
181:
177:
174:
171:
168:
165:
162:
160:
157:
156:
152:
149:
146:
143:
140:
137:
135:
134:
126:
123:
121:
116:
114:
110:
107:
96:
94:
90:
86:
83:
79:
69:
66:
58:
48:
43:
39:
35:
34:
27:
18:
17:
722:
708:
694:
680:
666:
652:
638:
610:. Retrieved
601:
587:
564:
548:
530:
514:
493:
475:
462:
446:
436:
434:
429:
425:
421:
412:
408:
400:
390:
374:
353:
327:
316:
289:
261:
233:
222:24 MHz
219:24 MHz
216:24 MHz
208:
183:
158:
144:MicroSquirt
124:
117:
102:
77:
76:
61:
52:
45:Please help
41:
30:
334:exhaust gas
213:8 MHz
138:MegaSquirt
91:(i.e., non-
82:aftermarket
49:if you can.
612:2020-08-07
580:References
391:The first
345:MAP sensor
120:spark plug
78:MegaSquirt
486:Ford EDIS
476:MS1/Extra
417:group buy
405:group buy
393:group buy
377:MC68HC908
343:sensor),
339:(EGO or O
184:Processor
55:July 2017
758:Category
452:Firmware
365:firmware
355:things:
324:Hardware
290:Features
262:User RAM
159:Released
113:Motorola
31:require
332:(TPS),
250:128 kB
247:128 kB
244:128 kB
153:MS3Pro
106:MC68332
99:History
33:cleanup
381:MC9S12
284:64 kB
281:64 kB
470:used.
437:V3.57
401:V1.01
278:4 kB
275:4 kB
272:4 kB
234:Flash
209:Speed
175:2010
172:2009
169:2007
166:2005
163:2001
111:from
428:and
426:v2.2
413:V2.2
409:V2.2
363:and
266:512
395:of
238:32
760::
621:^
430:v3
422:V3
359:,
240:kB
730:.
716:.
702:.
688:.
674:.
660:.
646:.
632:.
615:.
595:.
341:2
268:B
68:)
62:(
57:)
53:(
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.