VRX70B Ball Bearing Turbochargers are the latest iteration of Z1's VRX turbo's for the 2023+ Nissan Z. They are virtually identical to the original VRX70 Turbochargers released for Infiniti's VR30 powertrain, but use ball-bearing CHRA's to improve spool time and response.
These turbochargers are designed and engineered with precision to deliver exceptional power gains, excellent response, and a thrilling driving experience. VRX70 turbos are the first of their kind and offer a 100% new turbo assembly, recycling ZERO parts from the frame or cartridge of the original turbo. Because of this, no core charge or return is required, making them the most affordable and practical upgrade available! They feature a high-efficiency billet compressor wheel, advanced turbine blade design, and larger .70 A/R turbine housing, providing a significant increase in airflow and supporting in excess of 700 horsepower on cars with appropriate fuel systems and other modifications. Not only do these turbochargers provide an incredible performance boost, but they are also built to last. The Z1 VRX70 Turbochargers feature high-quality construction with durable materials, ensuring they withstand the toughest driving conditions and continue to perform at their best for years to come.
The Z1 VRX70 Turbochargers are a direct bolt-on upgrade and include all the necessary components, such as new oil and water lines, gaskets, and hardware.
Why larger turbos?
As you read that you probably thought to yourself "I want more power, duh", but what if we told you that's not the only thing you stand to gain from larger turbos?
The stock turbo's on your VR30 are small. We're talking "looks like they belong on a Honda Fit," small. This is great for engine response but means that they don't perform well at higher RPMs, especially as you increase boost with a tune. A Z with increased boost pressure will feel very responsive and quick, but when you pass peak power in the power band, they start to feel asthmatic and power starts dropping...fast. This occurs because the stock housings are incapable of flowing enough air to support the demand from the engine. Tuners often continue to increase boost pressure to compensate, however, this creates excessive pressure pre-turbine which in turn increases heat and makes the susceptibility to detonation much higher. At this point, the reason for upgraded turbos becomes obvious: larger turbos flow a greater volume of air with less restriction.
Z1's VRX70 Turbos features a .70 A/R turbine housing, boasting a substantial increase in flow over the stock .53 A/R housings. This means they are more efficient at producing power and require less boost pressure to achieve the same power levels. This also reduces turbine speeds and makes it easier to manage the heat produced by the turbos. More importantly, it helps the engine generate more horsepower towards the peak where sports cars are meant to be driven. To combat boost creep we maximized the available surface area of the wastegate port by designing a unique port shape. On this version of our VRX Turbo, we opted to utilize ceramic ball bearing CHRA's to further improve response and reduce spool time.
Installation Note: The VRX70 reuses your Z's existing wastegate actuator and speed sensor (on Red Sport applications) and must be configured properly when installed. Please understand this is a critical process, and failure to install and adjust the wastegate actuator properly will result in issues when operating and tuning the car. For this reason, we recommend these turbos be installed by a competent and reputable performance shop.
OPTIONS
When installing Z1's VRX70 Turbochargers, the factory diverter valves cannot be used. The increase in compressor housing size eliminated the available space where the factory diverter valves existed previously. As a result, a VRX-specific blow-off valve kit is required to run our VRX70 turbochargers. In the product options, you can choose to add any one of the following blow-off valve kits.
THE GAINS
The dyno graph below represents what we consider to be a safe limit for 93-octane fuel on the VR30, making 503whp and 469wtq at only 17PSI!. This was completed on Z1's Q60 with VRX turbo's and basic bolt-on modifications.
The dyno graph below shows the upward potential of the VRX70 with higher octane fuel. This tune was completed on the exact same car with 104-octane race gas and was tuned to the limits of the MAP sensor, making 670whp and 595wtq. 
Is 670whp just not enough? Then the dyno sheet below may satisfy you. Our friends at SOHO took the VRX70 even further, pushing them to 754whp and 587wtq.
Looking for more than 754whp? AMS now holds the VRX70B record with a WILD 827whp and 740wtq. This comes from a myriad of power mods including (but not limited to) the following;
Specifications:
- Ceramic Ball Bearing CHRA
- Turbine Housing
- .70 A/R (vs .53 A/R Stock)
- Material - Industry Leading D5S
- Turbine Wheel
- Inducer – 53.9mm
- Exducer – 47.0mm
- Material – Inconel 713C
- Compressor Housing
- .60 A/R (vs. .52 A/R stock)
- Compressor Wheel
- Inducer - 49.8mm
- Exducer - 67.6mm
- Material - Billet 7075 Aluminum
Features:
- No core required
- Track tested
- VSR balanced rotating assembly
- Custom billet compressor wheel
- Custom turbine wheel
- Reuses factory wastegate actuator
- Direct bolt-on replacement for factory turbos
- Compatible with factory cats and any aftermarket cats that use stock flange placement
- Capable of supporting well beyond 700+hp with proper fueling and supporting mods.
Fits:
 |