Decades after its original release, the Honda CRX has become a cult classic. The CRX offers a lightweight platform with a performance-oriented chassis -- the perfect combination for enthusiasts who are looking to build low-cost sports cars. As such, it's become increasingly popular to swap higher horsepower Honda engines such as the B16 into the great CRX chassis. Though a stock B16 mounted in a CRX will perform extraordinarily well for the price, installing a turbo kit on your B16 CRX will offer a level of horsepower not possible with a naturally aspirated B-series motor.
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Things you need
- Turbo kit
- Socket wrench
- Socket set
- Angle grinder
- Exhaust gasket
- Engine oil
- Radiator fluid
- Engine tuning software
Drain your CRX's engine oil and radiator fluid, as installing the turbo kit will require removal of oil and coolant lines. Take off the front bumper by removing all securing Phillips-head screws and hex bolts.
Remove the B16's stock intake by loosening the clamp ring at the throttle body, then removing any custom mounting screws. Remove the stock exhaust header by removing the header bolts from the front of the engine, as well as the exhaust bolts connecting the header to the B16's catalytic converter.
Install the exhaust manifold from your turbo kit into the header's location using the stock header bolts. Connect the turbo exhaust downpipe to the exhaust manifold with the supplied gasket and bolts. Bolt the other end of the downpipe to the catalytic converter using a new exhaust gasket and the stock bolts.
Install the turbocharger onto the exhaust manifold's mounting flange using the supplied bolts. Install your turbo kit's intake and/or air filter onto the turbocharger inlet. Route the intercooler J-pipe from in front of the radiator area to the turbocharger, and connect to the turbo's compression wheel with the supplied rubber adaptor and clamp rings.
Mount the intercooler in place by driving screws through the intercooler's mounting flange locations. Connect the intercooler and J-pipe with a rubber adaptor and clamp rings. Connect the intercooler up-pipe to the intercooler's outlet, routing it through the CRX's bumper well area, to the throttle body. Connect the up-pipe to the B16's throttle body with the supplied rubber adaptor.
Connect all required vacuum lines and sensors to the intercooler piping. Install your turbo kit's modified oil and coolant lines in place of the stock units, and connect them to the turbocharger. Refer to your turbo kit's specific routing diagram if you're unsure of hookup locations.
Use an angle grinder to cut a recess into the backside of the CRX's front bumper, so that it's able to fit over the intercooler. Reinstall the front bumper following the opposite procedure of removal. Replace the engine's oil and radiator fluid.
Purchase a tuning re-flash or standalone tuner for your B16. The substantially increased airflow created by the turbo system necessitates modified fuel tuning. An ECU re-flash installs base turbo programs onto the B16's stock ECU, allowing it to run the turbo system. For best results, have your CRX tuned by a professional using a standalone tuning system.
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