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Binary Rock

  1. 2014

Turbocharging the '99 Miata

Documenting the slow process of adding a turbo to my '99 Miata
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  • The Miata comes home

    The Miata comes home

    Yo, dawg, we heard you like tiny convertibles, so... you went out and bought a second tiny convertible. Totally reasonable.

  • Interior shot

    Interior shot

    The interior is in great shape for a 15-year-old car. It was always garage-kept, and it shows

  • Engine bay

    Engine bay

    So clean! It will be nice to work in here

  • Odometer

    Odometer

    Palindrome!

  • Step 1: Install subwoofer

    Step 1: Install subwoofer

    Much easier with seat removed

  • Power cable routing to battery in trunk

    Power cable routing to battery in trunk

    I love when cars leave me openings to route wires without having to drill holes

  • Power cable routing to battery in trunk

    Power cable routing to battery in trunk

    Nice and easy power cable run

  • Subwoofer mounted behind passenger seat

    Subwoofer mounted behind passenger seat

  • Passenger seat reinstalled

    Passenger seat reinstalled

    The passenger seat only loses one click of front-to-back adjustment, not bad at all

  • Subwoofer invisible when seats are back

    Subwoofer invisible when seats are back

    And the tiny subwoofer provides plenty of volume to fill in the bottom end, which is all I wanted

  • Wheels installed

    Wheels installed

    Fortunately, Miatas have the same bolt pattern as Minis, so I was able to move my wheels right over from the old car

  • Double Trouble

    Double Trouble

    ...But not before replacing the tires, eek

  • Driver's side tear

    Driver's side tear

    The top has a tear on each side. I practically never drive with the top up, but I'd like the car to be watertight if I get caught in the rain

  • Passenger's side tear

    Passenger's side tear

    This one's bigger

  • Driver's side outside patch applied

    Driver's side outside patch applied

    After some Goo Gone and some elbow grease to get rid of the gunk left behind by the previous owner's duct tape, I apply vinyl patches on the outside of each tear

  • Passenger's side outside patch applied

    Passenger's side outside patch applied

    The instructions called for 1" of contact area on all sides of the tear, but that wasn't possible here, so I just tried to give the patch as much contact as possible

  • Driver's side inside patch applied

    Driver's side inside patch applied

    To help reinforce the patches, I also applied cloth patches on the inside of each tear, extending it up higher to cover spots that looked like they were about to tear soon

  • Passenger's side inside patch applied

    Passenger's side inside patch applied

    Ditto here. This didn't work very well -- the patches get stuck on the metal bows when I retract the top, and peel away from the cloth

  • A shot of the oil pan

    A shot of the oil pan

    A little bit of oil is leaking from somewhere, possibly the rear main seal or cam position sensor. Pretty minor, though

  • Installing wideband oxygen sensor

    Installing wideband oxygen sensor

    I haven't gotten my hands dirty in the innards of a car for 10 years or so, so I'm limbering muscles I had forgotten I had (both figuratively and literally)

  • Downpipe flange

    Downpipe flange

    Man, I sure love wrestling with exhaust bolts. Finally after hours of struggling, I get the downpipe nuts free and the oxygen sensor off

  • Catalytic converter flange

    Catalytic converter flange

    This one was way easier -- lots of room for a breaker bar

  • Separated midpipe

    Separated midpipe

    After four hours or so, the midpipe is finally free! Time's up for the day, so welding will have to be tomorrow

  • Cutting out a section of the heat shield

    Cutting out a section of the heat shield

  • Drilling the hole for the bung

    Drilling the hole for the bung

  • Test fitting bung

    Test fitting bung

  • Welding the bung

    Welding the bung

  • Ooh, glowy

    Ooh, glowy

  • Finished product

    Finished product

  • Test fitting the sensor

    Test fitting the sensor

  • Midpipe reinstalled with wideband sensor mounted

    Midpipe reinstalled with wideband sensor mounted

  • Pulling the cable through the firewall

    Pulling the cable through the firewall

  • Check out my mad tyte gauge mounting

    Check out my mad tyte gauge mounting

  • Injector Dynamics ID1000 injectors arrive

    Injector Dynamics ID1000 injectors arrive

  • such matched. many flow. wow

    such matched. many flow. wow

  • So pretty

    So pretty

    These 1000cc injectors are more than I'll ever need, but Injector Dynamics does such precise flow matching at low duty cycles that they can idle just as well as stock. This way I'll be covered no matter what I do in the future, even if I want to switch to E85 down the road (which requires about 30% more fuel)

  • Bosch wiring connectors

    Bosch wiring connectors

    They come with connectors to splice onto the factory wiring, but I'd rather use adapter pigtails to leave my factory wiring harness intact

  • Yess, stickers, that's what's really important

    Yess, stickers, that's what's really important

  • Oh no, wrong pigtails!

    Oh no, wrong pigtails!

    I ordered adapter pigtails to avoid cutting my wiring harness, but I accidentally ordered them backwards -- I needed female EV6 to male Denso, but I ordered male EV6 to female Denso. Swing and a miss

  • Here we go, these are the correct adapters

    Here we go, these are the correct adapters

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    Passenger's side outside patch applied
    Driver's side inside patch applied
    Passenger's side inside patch applied