I want to swap in a D15 vtec and still have not decided weather to convert my car to obd1 or just run a vtec controller. If I run it non obd which ecu is the best to use? If I run it obd1 which ecu should I use? What do I need other than an obd0 to obd1 harness, a dizzy, and a 4 wire O2 to run it obd1? Thanks

 

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Save yourself the headache and do a full obd1 conversion. You can use a P08 or P28 ECU.

You can still go with the non-vtec ECU / VAFC method but its pretty tricky to pull off and you will not be getting the most out of the motor. For one you have to remap the ECU to have vtec fuel and timing at a set vtec point. This means the ECU has to be rechipped and tuned properly. You are also going to be held up by having very little vtec point adjustment. If you set the vtec via vafc at 5500, the ECU has to be remapped to run the correct vtec timing and fuelling at 5500 rpm. If you decide to run a lower vtec point...and the ecu is not remapped, the car could bog or even cut out.

I've done an ECU like this for a client. He's running an OBD0 PM6 ECU with a VAFC to run a SOHC vtec.

Another idea would be to use an OBD0 PR3 or PW0 (B16 ECUs) remapped to run the D15. This way you keep the OBD0 plugs. See if someone has done this before.

 

ok thanks