Decoders

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Speeduino supports an ever growing number of crank and cam decoders and trigger wheels. This includes some of the more common OEM setups as well as those favoured in the aftermarket (Such as the missing tooth wheels).

The list below includes all those that are currently supported. They each lead to a page with details on using the decoder (These pages are a Work in Progress)

Decoder Status Applications / Description
Missing Tooth Complete A crank wheel with 1 or more 'missing' teeth
Missing Tooth (cam) Complete A camshaft or distributor wheel with 1 or more 'missing' teeth at half-crank speed
Dual Wheel Complete Two signals combined from two different wheels
Basic Distributor Complete Untimed pulses that are the equivalent of a tach or distributor pulse
GM 7X Untested Multi tooth pulse
4G63 Complete As used on many 4 cylinder Mitsubishis and NA/NB Miata / MX-5. Also supports the 6 cylinder variation of this pattern (Eg 6g72)
GM 24X Untested Commonly used on GM LS1 V8
Jeep 2000 Untested 6 Cylinder Jeep engines from '91 to 2000
Audi 135 Complete Audi engines with 135 pulses-per-revolution
Honda D17 Untested Honda 4 cylinder D17 engine
Miata 99 Complete 1.8L Miata/MX5 from '99 to '00
Non-360 Complete A variation of the dual wheel decoder that can be used with tooth counts that do not divide evenly into 360
Nissan 360 In progress 360 tooth cam wheel used in many 4 and 6 cylinder engines.
Subaru 6/7 Untested Subaru engines using the 6 tooth crank wheel + 7 tooth cam wheel arrangement
Daihatsu +1 Complete 3+1 and 4+1 patterns used on 3 and 4 cylinder Daihatsu engines
Subaru 36-2-2-2 Complete A 30 tooth wheel with three strategically placed big gaps

All signals need to be conditioned to a 3.3v - 5v dc square wave before being used by the firmware.