Unraveling the Mystery: Who Makes Subaru Turbochargers?
If you're a proud owner of a Subaru, particularly one with that exhilarating turbocharged punch, you've likely wondered about the heart of that power – the turbocharger. For many, the brand "Subaru" itself is synonymous with robust engineering and all-wheel-drive capability. But when it comes to the specific components that deliver that extra boost, like the turbocharger, the story can be a bit more nuanced. So, let's get down to brass tacks: Who makes Subaru turbochargers?
The short and most direct answer is that Subaru doesn't manufacture its turbochargers in-house. Instead, they rely on partnerships with specialized turbocharger manufacturers. Over the years, and across different models and generations of Subaru vehicles, there have been a few key players who have supplied these vital components. This is a common practice in the automotive industry; manufacturers often outsource the production of specialized parts to companies with deep expertise in those specific technologies.
The Primary Supplier: IHI Turbo
For the vast majority of turbocharged Subaru vehicles sold in the United States, the turbocharger has been supplied by a Japanese company called **IHI Turbo**. IHI (Ishikawajima-Harima Heavy Industries Co., Ltd.) is a global engineering powerhouse with a long history in various industrial sectors, including aerospace and shipbuilding, and a significant presence in the automotive turbocharger market.
IHI has been a consistent and reliable partner for Subaru for many years, supplying turbochargers for popular models like:
- The iconic WRX and WRX STI, where performance is paramount.
- The sporty Forester XT models (in past generations).
- The performance-oriented versions of the Outback XT (also in past generations).
The turbochargers supplied by IHI are often custom-designed or tuned specifically for Subaru's boxer engine architecture. This ensures optimal performance, efficiency, and integration with the vehicle's engine management system. These are not just off-the-shelf turbos; they are carefully engineered to meet Subaru's demanding specifications.
Why IHI?
IHI's reputation for quality, reliability, and technological innovation makes them a natural choice for a performance-focused brand like Subaru. They have a deep understanding of turbocharger technology, including:
- Variable Geometry Turbos (VGT): While less common on performance Subarus, IHI is capable of producing VGT technology which adjusts the turbocharger's airflow for improved response across a wider RPM range.
- Ball Bearing Cartridges: Many performance turbochargers, including those for Subaru, utilize ball bearings instead of journal bearings. This reduces friction and allows for quicker spool-up, meaning the turbo kicks in sooner and delivers power more responsively.
- Advanced Materials: IHI uses high-quality materials that can withstand the extreme temperatures and pressures inherent in turbocharging.
Other Potential Suppliers and Considerations
While IHI has been the dominant supplier, it's worth noting that the automotive landscape can shift. In some rare instances or for specific niche applications, other manufacturers might be involved. However, for the average American consumer looking at a modern turbocharged Subaru, the turbocharger is almost certainly an IHI unit.
It's also important to distinguish between the OEM (Original Equipment Manufacturer) turbocharger and aftermarket options. When you purchase a new Subaru, the turbocharger installed is an OEM part, typically from IHI. If you decide to modify your Subaru with an aftermarket turbo, you'll be looking at a different set of manufacturers, such as Garrett, BorgWarner, or other specialized performance companies.
The Boxer Engine Connection
Subaru's unique horizontally-opposed or "boxer" engine design plays a role in turbocharger selection. The compact nature of the boxer engine and its specific exhaust manifold routing can influence the type and placement of the turbocharger. IHI has a proven track record of developing turbochargers that integrate seamlessly with this engine configuration, contributing to the characteristic sound and performance of Subaru vehicles.
So, the next time you feel that surge of acceleration from your turbocharged Subaru, you can appreciate the engineering prowess of both Subaru and their trusted partner, IHI Turbo, working in harmony to deliver an unforgettable driving experience.
Frequently Asked Questions (FAQ)
Q: How do I know if my Subaru has a turbocharger?
A: The easiest way to tell is by checking your Subaru's model designation. Vehicles with "XT" in their model name (e.g., Forester XT, Outback XT) historically indicated a turbocharged engine. For current models like the WRX, the presence of a turbo is a defining characteristic. You can also often hear the distinct "whoosh" sound of the turbocharger spooling up under acceleration if you listen closely.
Q: Why did Subaru choose IHI as their turbocharger supplier?
A: Subaru chose IHI due to their long-standing reputation for producing high-quality, reliable, and performance-oriented turbochargers. IHI's ability to engineer specific turbocharger solutions that integrate well with Subaru's unique boxer engine design was also a key factor in this enduring partnership.
Q: Can I upgrade my Subaru's turbocharger to a different brand?
A: Yes, absolutely. Many Subaru enthusiasts opt for aftermarket turbochargers from brands like Garrett or BorgWarner to increase horsepower and torque. However, these upgrades often require other supporting modifications to the engine and fuel system to ensure optimal performance and reliability. It's a path best pursued with careful research and professional installation.
Q: How do turbochargers work on my Subaru?
A: A turbocharger uses the engine's exhaust gases to spin a turbine. This turbine is connected to a compressor wheel, which then forces more air into the engine's cylinders. More air means more fuel can be burned, resulting in a significant increase in power and torque. It essentially allows your engine to "breathe" more efficiently.
