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zc swap into 89 rex

Discussion in 'Civic and CRX - EF' started by 93f22a1, Dec 6, 2009.

  1. 93f22a1

    93f22a1 New Member

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    i know this has been beaten to death but i searched all over and couldnt find the answer i needed. i have an 89 hf or si not sure which one but to do the zc what all will i need as far as axels, harness, ecu, ect. please dont post something that was in another post i just need a straight up answer from someone that really knows.
     
  2. ZCpowerdSI

    ZCpowerdSI New Member

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    is ur rex mpfi?
     
  3. 93f22a1

    93f22a1 New Member

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    yeah its got the d15b7 mpfi
     
  4. jlicrx

    jlicrx Senior Member

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    dohc ZC or sohc ZC? - either one will swap right in using the engine harness that you now have (dohc requires minor wiring change at the distributor) - axles have nothing to do with the engine, just the transmission being used

    OBD0 or OBD1? - OBD0 sohc ECU = PM6 - OBD0 dohc ECU = PM7 or PG7 (PM6 or PR4 can also be used, just don't work as well)
     
  5. ZCpowerdSI

    ZCpowerdSI New Member

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    YES. He is absolutely right!! use the axels you already have.. the minor wire change is just the 2 blue wires in the bigger distributor connector, take them out of the connector and wire them to the cylinder sensor.
     
  6. 93f22a1

    93f22a1 New Member

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    what did the pm7 and pg7 come in
     
  7. ZCpowerdSI

    ZCpowerdSI New Member

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    the pm7 came in the civic's, crx's, and teg's that came with the dohc zc... and i think the pg7 came in the 86-89 integra running a b16 Vtec. correct me if im wrong guys
     
  8. 93f22a1

    93f22a1 New Member

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    which would you recomend using. im sure i can get either with no problem.
     
  9. ZCpowerdSI

    ZCpowerdSI New Member

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    For a dohc zc use a pm7, the original ecu. its always best. More aggressive fuel injection.
     
  10. jlicrx

    jlicrx Senior Member

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    PM7 came in the 88-91 JDM Civic/CRX Si models with the DOHC ZC engine - PG7 came in the 86-89 USDM Integra with D16A1 engine - the 86-87 PG7 is different from the 88-89 PG7 - the 86-87 D16A1 had vacuum advance ignition timing and the 86-87 ECU won't work on engine that has electronic advance, like the 88-89 D16A1 or the 88-91 JDM DOHC ZC
     
    Last edited: Dec 11, 2009
  11. tjweberhonda123

    tjweberhonda123 New Member

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    im trying the same swap into my hf rex dohc zc and is the dohc zc faster then dohc ls non v tec in an si rex
     
  12. tjweberhonda123

    tjweberhonda123 New Member

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    and wat upgrades should i get and from wat site
     
  13. ZCpowerdSI

    ZCpowerdSI New Member

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    Depends on the driver! I've beaten B18B (LS non-Vtec) EF's with my DOHC ZC EF.

    You should start you own thread tho!!
     
  14. ZCpowerdSI

    ZCpowerdSI New Member

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    LOL. I don't know why i said the B16 ran a PG7. I'm running a PG7 with my ZC.
     
  15. tjweberhonda123

    tjweberhonda123 New Member

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    yea true and lazy this was easyr lol!)
     
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