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Thread: Swaping a NB motor into my NA

  1. #1

    Default Swaping a NB motor into my NA

    My motor is getting tired and starting to use more oil between changes so I'm planning on saving for an engine swap.

    I was thinking of swapping in a lower mileage NB motor. I figure it would be worth it for the HP increase and freer flowing head. What challenges do I face with this over a NA motor?

    BTW, I have OBDI and hope to keep it that way.
    ...and across the line.

    1996 Mazda Miata - R-Package (Eve-L)
    2012 Mazda CX-9 - Grand Touring (Dory)




  2. #2

    Default

    I'm going to guess that an NB motor should work with the stock NA computer, and the only addition you'll have to make is an RPM switch to control the VICS intake butterflies. You'd also have to swap your old CAS into the NB head.
    '94 Black & Black & Tan
    '99 head swap, JR header, TDR intake & header blanket, MegaSquirt, RB hollow bar, Tein Flex, 15x8 6ULs, HD M2 Sport, FM cat, Borla cat-back, black '95M interior, MOMO Zebrano, IL Motorsport console...

    Dyno Days
    8/16/08 (bone stock): 103.1 hp/99.0 lb-ft - Dynojet
    8/23/08 (Borla cat-back): 108.2 hp/104.1 lb-ft - Dynojet
    8/13/11 (more stuff...): 126 hp/116 lb-ft - Mustang dyno

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