Z1 Q50 / Q60 VRX70B Bolt-On Ball Bearing Turbochargers

VRX70B Ball Bearing Turbochargers are the latest iteration of Z1’s VRX turbo’s for the Infiniti Q50 and Q60. They are virtually identical to the original VRX70 Turbochargers, 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 Q50 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 Q’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.

When at this level of performance, we highly recommend installing blow-off valves to handle boost relief. If you’re not intending to install blow-off valves, we suggest speaking with your tuner first.

THE GAINS

Below are some graphs of vehicles with the VRX70 turbos. All are customer vehicles installed and tuned by us in our facility.

The dyno graph below is a stock redsport pull (red) vs tuned on a E60 ethanol blend pull (blue). You can notice the significant difference in power and torque, stock making 362 whp and 383 wtq Vs. tuned and modded making 668 whp and 593 wtq. Vehicle had VRX70 turbos, proper cooling mods, high flow cats, HKS 2.5″ catback, AMS Intakes, and AMS stage 1 Injectors.

The dyno graph below is a Q50 paired with Z1 VRX70 turbos, the proper cooling mods, stock injectors, AMS Stage 3 HPFP, E50 ethanol blend, Boosted 6 Longtubes, and Xeyro Customs turboback exhaust. Making a whopping 703 whp and 572 wtq.

The dyno graph below is the same Q50 above tuned to the limits of the map sensor. This was the glory pass making an astonishing 763 whp and 632 wtq, resulting in a sleeper daily driven vehicle.