1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

need help with head swap

Discussion in 'HYBRID -> EG-EK / DC' started by rogue420, Oct 28, 2003.

  1. rogue420

    rogue420 Junior Member

    Messages:
    14
    Likes Received:
    0
    Joined:
    Feb 3, 2003
    hey guys,
    bear with me if you've answered these qustions before. i just got rid of my oil burning 87n/a supra and bought a 95 cx. this is the weakest car i've ever driven but the price was right so i got it. i'm looking to do a budget vtec head swap. my questions are, what do i need for a d16y8 head swap? can i swap any d-series head onto my block? are all d-series headers interchangable? what ECU should i use? what wiring issues am i going to run into?etc,etc. any help would be appriceated.
    thanks
     
  2. MaaseyRacer

    MaaseyRacer Senior Member

    Messages:
    2,980
    Likes Received:
    0
    Joined:
    Sep 29, 2002
    Location:
    San Francisco, Ca.
    if i were you I would try to do a d16z6 head swap as it is the same obd as your car. you will need:
    Head - Complete with intake manifold, vtec solinoid, disttibutor, ect...
    Head Gasket
    Timing Belt
    D16z6 wire harness
    ECU
    Probably not a bad time to change the water pump and thermostat
    that is pretty much all that i can think of.
     
  3. rogue420

    rogue420 Junior Member

    Messages:
    14
    Likes Received:
    0
    Joined:
    Feb 3, 2003
    so your saying that i can't just bolt the head on using my intake manifold, distributor, header, and wiring harness, and then wire up the vtec to an ECU out of a 95-95 Si? <_<
     
  4. E_SolSi

    E_SolSi Member of the 20 nut club Moderator VIP

    Messages:
    30,024
    Likes Received:
    3,951
    Joined:
    Sep 28, 2002
    Location:
    CT
    did you even read what he said????





    and it would be a good idea to get rid of the CX exhaust manifold (header) too


    before you put the new VTEC head on you need to remove the oil jet from the block
     
  5. MaaseyRacer

    MaaseyRacer Senior Member

    Messages:
    2,980
    Likes Received:
    0
    Joined:
    Sep 29, 2002
    Location:
    San Francisco, Ca.

    good call i forgot about that...
     
  6. rogue420

    rogue420 Junior Member

    Messages:
    14
    Likes Received:
    0
    Joined:
    Feb 3, 2003
    the car came with a dc sports header. can i use this with this swap?
     
  7. E_SolSi

    E_SolSi Member of the 20 nut club Moderator VIP

    Messages:
    30,024
    Likes Received:
    3,951
    Joined:
    Sep 28, 2002
    Location:
    CT
  8. rogue420

    rogue420 Junior Member

    Messages:
    14
    Likes Received:
    0
    Joined:
    Feb 3, 2003
    so why can't i reuse my old dist and harness. i see people on here saying that they can use their stock harness and then just wiring up all the vtec stuff.
    please educate the uneducated :spin:
     
  9. E_SolSi

    E_SolSi Member of the 20 nut club Moderator VIP

    Messages:
    30,024
    Likes Received:
    3,951
    Joined:
    Sep 28, 2002
    Location:
    CT
    you can use it but your gunna need to modify a bunch of shit and you will need a bunch of plugs off the D16Z6 harness .... it will be far easier to just get the harness when you get the rest of it from the junkyard or wherever
     
  10. rogue420

    rogue420 Junior Member

    Messages:
    14
    Likes Received:
    0
    Joined:
    Feb 3, 2003
    ok, i'm getting conflicting reports. the guy at hasport told me to use my stock wiring harness, distributer, and ecu, and just wire in the vtec solinoid, oil pressure sensor, etc. he said the ecu was set up for vtec so no need to get a new one just get the few conectors and hardwire from the engine to the ecu. this is how i thought that it was suposed to be done in the first place. so why did you say that i needed to replace my distributor, harness, and ecu with one off of an ex or si?
    lol,
    thanks :blink:
     
  11. pissedoffsol

    pissedoffsol RETIRED

    Messages:
    49,693
    Likes Received:
    53
    Joined:
    Sep 28, 2002
    Location:
    Retirement Home
    the hasport guy is a fucking retard if he told you that, and frankly, i don't buy it. I've spoken with Brian several times.. maybe you got an intern? :shrug:

    here's the deal.

    CX ecu is NOT wired/plugged/has control over for vtec. never has. never will be.
    without the p28 (ecu from the d16z6), there is no way to control VTEC Correctly. there are hacks- such as the RPM activated switch with an ignition pill, or a manual switch that you push- but frankly, both those options suck balls, will not give you the best power, and in the long run, will hurt your motor. timing maps are different under vtec, so are fuel maps. no vtec switch can adjust for those.

    your cx distributor will work fine.

    you need the z6 intake manifold if you want a power gain, as the cx uses shit that's way to small and won't flow for the life of you. but i don't see why the CX IM wouldn't work.

    as for the harness, frankly, its the easiest way to go. Yes, you don't need it... but there are several plugs on the z6 that the cx does not have. Now, how do you intend to plug in to a harness without the female (or opposing should i say?) end of the connector to go into it? you are only going to find that on the z6's harness.
    Yes, you could hack some wire clips onto it which will probably fall off.

    it's your car, and your choice- but the harness is the way to do it.

    now, after the z6 harness is plugged in, that gives you the proper wires run to the shock tower mounting connections on the passenger side. from there, you will need to run the wires down into the ecu on the passenger side kick panel.

    after all that, you will need to convert to a 4-wire o2 sensor, as the CX has a 1 or 2 wired depending on the year. Again, this will take you up to the shock tower plug, and the other wires will need to be run, as they are not part of the cx chassis harness.

    that should cover the wiring.

    the oil thing E_Sol describes above must be removed.
    the headgasket and belt and pump shoudl be replaced as Massey suggested.
    the CX header is a piece of shit. again, if you want to make power, this is not the item to keep. score a z6 exhaust manifold and cat combo if you can't afford an aftermarket one just yet. $25 or so should score you that.

    there's a lot more to it that it sounds or what the internet has made it out to be of "slapping on a vtec head". its much more involved. torquing the headstuds correctly, getting the timing right with the timing gun... the list can go on.......
     
Verification:
Draft saved Draft deleted

Share This Page