karDoel Posted September 19, 2022 Report Share Posted September 19, 2022 I,ve plan to upgrade my HC92+ to HC92X on my civic, the question is i also have evo VI with stock ecu, is the hc92+ have capability to run evo VI ? with a custom wiring offcourse Quote Link to comment Share on other sites More sharing options...
Adamw Posted September 19, 2022 Report Share Posted September 19, 2022 Unfortunately it wouldnt be so simple. There are two significant differences. The Honda ecu has highside drives fitted to aux 5 & 6 for the vtec and intake solenoid. The Evo needs aux 5&6 to be lowside drive for the idle stepper motor. The Evo needs a relatively complicated main relay control circuit so the ecu can stay alive for a while after ignition is turned off so it can park the stepper motor ready for the next start up. The Honda ecu doesnt have this circuit. For an ecu that could be shared between these two cars you would be better with a wire in ecu like the Storm with a basic adapter harness for both cars. Quote Link to comment Share on other sites More sharing options...
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