Originally posted by preylude99
i have a 99 prelude with just an intake.... if I were to get the apexi controller do you just plug it in to the ecu or how do you go about installing it? can you change the vtec RPM engagement on the fly on the controller or do you have to do something else? and what is the lowest RPM's you can run vtec at on stock cams without it lagging, 4600?
The AFC splices into your ECM harness, tapping some wires and bypassing others. You can change settings on the fly via the control buttons. You will need to tune it on a dyno to find the right settings for your application. You'll do more harm than good if you just drop your VTEC engagement point and expect it to work well. If all you have is an intake, it might not be worth the dyno time just to tune for that.