vtec into crx swap
Thread Starter
reject
Joined: Feb 2002
Posts: 129
Likes: 0
vtec into crx swap
i have a sohc vtec from a 95 civic and an intake manifoldd from the same. My car is an automatic, i was told that i need to convert my dx wire harness to a si wire harness, then buy a rpm activated switch to hook the vtec up to. does this sound right to anyone? or if not HELP!!!
Guest
Posts: n/a
well that statement is TRUE, but it is missing a lot of info. There are a few ways to do this swap and I hope I do a good job explaining them:
Way #1- You can swap the motor in and use the obd0 electronics (the one that your car already has). You'll need to convert your dx harness to si. In addition to that you'll need the crx si intake manifold, injectors, distributor, ECU, injector resistor box, injector plugs and maybe the throttle body as well. I don't know if you have these parts but if you choose to go this route you will need them. In addition to that you'll need an rmp activated switch to hook up the VTEC. What is the benefit of doing it this way?-----> very little wiring changes and straightforward, although the engine will not run to its full potential.
Way #2- Same as above but instead of using the crx si ECU you get the Zdyne 1-wire conversion. This way you won't need the rpm activated switch for VTEC b/c the Zdyne takes care of that and you'll have a better programmed ECU for that motor.
Way #3 (the way I did it) - You swap everything from the 95 sohc vtec engine over to your car. This means rewiring your car for obd1 and using the sohc motor with it's stock injectors, manifolds, distributor and ECU. You still need to convert the dx to multi point plus you have to wire some extra wires from the dash harness to the engine bay such as the VTEC solenoid, VTEC oil pressure, O2 heater signal, CYP sensors etc.
why do it this way?------> the motor runs like it is supposed to run from factory with it's own injectors, distributor and ECU.
feel free to ask questions and I'll try to help out....
L.
Way #1- You can swap the motor in and use the obd0 electronics (the one that your car already has). You'll need to convert your dx harness to si. In addition to that you'll need the crx si intake manifold, injectors, distributor, ECU, injector resistor box, injector plugs and maybe the throttle body as well. I don't know if you have these parts but if you choose to go this route you will need them. In addition to that you'll need an rmp activated switch to hook up the VTEC. What is the benefit of doing it this way?-----> very little wiring changes and straightforward, although the engine will not run to its full potential.
Way #2- Same as above but instead of using the crx si ECU you get the Zdyne 1-wire conversion. This way you won't need the rpm activated switch for VTEC b/c the Zdyne takes care of that and you'll have a better programmed ECU for that motor.
Way #3 (the way I did it) - You swap everything from the 95 sohc vtec engine over to your car. This means rewiring your car for obd1 and using the sohc motor with it's stock injectors, manifolds, distributor and ECU. You still need to convert the dx to multi point plus you have to wire some extra wires from the dash harness to the engine bay such as the VTEC solenoid, VTEC oil pressure, O2 heater signal, CYP sensors etc.
why do it this way?------> the motor runs like it is supposed to run from factory with it's own injectors, distributor and ECU.
feel free to ask questions and I'll try to help out....
L.
