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b18c to 91 civic, what do i need?

Discussion in 'Civic and CRX - EF' started by boostedb18werdd, Nov 12, 2012.

  1. boostedb18werdd

    boostedb18werdd New Member

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    I have a 91 civic hatch. Had a d15b2. Pulled motor out and bought a b18c. I've done nothing to engine bay and have not converted anything yet because I don't want to mess anything up. This is my first Honda swap and I need to know what all is needed. After the swap I will be doing a full build on motor internally and externally. No bore over though. Would like to hit 500hp. Will obviously be boosting. As of now I have new hasport b-ef swap mounts and a b18c motor. What harness do I need and do I need to pull dash and rerun all new wiring harness? What ecu? I will be taking it to xenocron in hillburn ny for tune. Do I need to alter my bay at all? Remove anything from my car? Replace anything etc. Any and all help would be greatly appreciated. Thanks! Ed
     
  2. jlicrx

    jlicrx Senior Member

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    couple of questions first:
    which B18C do you have - GSR or Type R?
    do you have the transmission?
    is the mount kit for cable clutch or hydraulic clutch?

    since you had D15B2, i assume this was a DX model with 5-speed transmission, correct?

    for any swap, you use the engine wiring harness that was originally in your car and make the necessary changes to it - you will need a P72 ECU and you will need to convert the car from DPFI to MPFI and convert from OBD0 to OBD1 which will require a ECU jumper for OBD0 to OBD1 - a lot of suppliers (like Boomslang) for the jumper incorporate the DPFI to MPFI wiring changes into the jumper as well as providing wiring for the 4-wire O2 sensor, VTEC and knock sensor - much easier to go this route - you will still need to make additional wiring changes to your harness for cooling fan switch, injectors, etc. - you will also need to extend wiring for the MAP sensor

    you will need axles, intermediate shaft, modified shift linkage, throttle cable and fuel line from filter to fuel rail

    since you will be boosting it, i would suggest you get a different intake manifold, especially if it is a GSR engine.

    you will need to take a big hammer to the inner fender area to provide clearance for the alternator - Hasport instructions describe this pretty well and also list what other parts, like engine mount bracket, etc. that you will need

    you will also need exhaust to the back of the car in addition to the turbo exhaust manifold, etc.

    before you install the engine, you should install a new water pump, timing belt and timing belt tensioner and not a bad idea to replace front and rear crank seals and oil pan gasket - a lot easier to do before you install the engine

    EDIT: since you will be boosting it, you need to seriously look at swapping to an aftermarket front cross member and half size radiator in order to provide adequate clearance for the turbo and piping
     
    Last edited: Nov 13, 2012
  3. boostedb18werdd

    boostedb18werdd New Member

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    I don't have a trans yet because i know I'm gunna need one to handle the power. Mounts are for cable. Yes its a dx. I have a skunk2 pro series intake mani and the motor is gsr. I have a p72 ecu as well. Appreciate the help so far.
     
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