i am using currently a hall effect for rpm but can use a vr sensor if i add the opamp and circuit for it, also tps, iat, ( map is supported as well) oil and fuel pressure sensors all for input. out puts are coil -, fuel pump relay, injector, ( and a small dash unit soon )

i am building it to grow as i finish the code so it will later do multi cly engines with distributors only( coil on plug maybe later) and batch fire injection or tbi ( gm 2bbl tbi form the 90's are super great for this)

hey cg27,what parameter will be use as a input or output for your arduino ? i do tinking about my engine old toyota corolla will convert old carb to diy efi arduino