Megasquirt-3 MS3 Ignition modes

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Wheel mode

Cam required?

Sequential fuel/spark?

Typical applications

EDIS

N

With addition of cam input

Early to mid 1990s Fords

Basic Trigger

N

N

Widespread - HEI7, GMDIS, TFI, distributor

Trigger Return

N

N

Typically VW hall distributors

Trigger wheel

"Missing tooth wheel" on crank

"Missing tooth wheel" on cam

"Missing tooth wheel" on crank + single tooth on cam

"Dual wheel" non missing on crank + single tooth on cam

(36-1, 60-2, 4-1, 24/1, 24/2, 6-1 etc.)

Varies

Varies

Ford, Bosch ECUs, very widespread

See detail page for all variations

NGC 4cyl

(36-1+1)

N

With addition of cam input

"Next Generation" Crank Chryslers

36-2-2-2

N

With addition of cam input on Subaru

Some Subaru and RX8

Neon/420A

N

With addition of cam input

Subaru 6/7

Y

Y

Mitsubushi 6g72

Y

Y

4/1 CAS

Y

Y

4G63 (Miata)

Y

Y

Renix 44-2-2

N

N

Twin trigger even

(aka. dual spark)

N

N

Two sensors at crank speed

Twin trigger

odd-fire

N

N

Two sensors at crank speed

Suzuki Swift

N

?

Unproven

Suzuki Vitara

N

?

Unproven

Daihatsu 3 cyl

N

Y

Unproven

Daihatsu 4cyl

N

Y

Unproven

99-00 Miata

Y

Y

Rover K Series 36-1-1

N

N

Rover K Series 36-1-1-1-1

N

N

Rover K Series 36-2-2

N

N

Honda RC51

Y

Y?

Chrysler 2.2/2.5

Y

N

Two sensors at cam speed

GM 7X native

N

N

32-2 Harley

N

N

Honda VTR1000 12-3

N

N

IAW Weber-Marelli

Y

Y

Fiat 1.8 16V

Y

?

Mitsubishi 360 tooth CAS

Y

N (3)

6cyl Nissan increasing

Mitsubishi 360 tooth CAS

Y

Y

8cyl Optispark

LS1

Y

Y

LS1, LM7 etc with 24X crank

LS2

Y

Y

LS2 etc with 58X crank