We’ve been working on something we think is really exciting…
As an organization, Full-Race is committed to constant improvement. We work every day to “Raise-the-Bar” in the engineering and fabrication of performance boosting systems for the automotive aftermarket. Our obsession with achieving ever higher levels of performance has driven us to create our legendary turbo kits (all in-house!). Today, Full-Race is recognized world-wide as the premiere manufacturer of Robotic-TIG welded turbo manifolds and the leaders in TwinScroll turbo kit technology.
The Next Generation of Engine Boosting Devices
BorgWarner turbocharging systems have deep roots in the world of high performance – from their being the OEM for Porsche, BMW and Audi – even the Indy 500 trophy is theirs. The hard working psycho-heavy-duty applications like John Deere and CAT rely on Borg Warner for their engine boosting requirements.
Sierra Sierra Time Attack Evo
The Sierra Sierra Time Attack Evo is powered by our Full-Race Twinscroll Turbo kit. For years their team battled turbo failures. BW engineering saw this as an ideal test bed where twin-scroll BorgWarner EFR8374, 9174 and 9180 turbochargers could be fully evaluated. Soon after, the EFR powered vehicle re-wrote the record books with a 298km/h top speed record at World Time Attack at Eastern Creek in Sydney, Australia.
What started as a dream-team of engineering partners designing a turbocharger lineup from scratch – refusing to be limited by availability of what already exists – resulted with EFR turbochargers. Engineering decisions were made that embody the state-of-the-art in high performance turbocharging. Top shelf aerodynamics were developed. Features like ceramic ball bearings, FMW compressor wheels, and Gamma-Ti turbine wheels were combined with Twinscroll stainless steel housings as our intention to maximize the performance of these turbos in every possible way.
EFR Hot Side (Turbine)
The most exciting technology in the EFR package is the low inertia Gamma-Ti Turbine Wheel. All EFR turbine wheels are made from a high performance lightweight material known as “Gamma-Ti”. This material innovation is not quite metal and not quite ceramic, it is considered an “inter-metallic compound”. Comprised primarily of titanium and aluminum (titanium-aluminide) with other trace elements, the Gamma-Ti turbine wheel is so light it’s nearly the same weight as the forged-machined aluminum compressor wheel. This approximate 1:1 turbine:compressor weight ratio dramatically improves turbo response. Further strength benefits are realized at high temperatures as Gamma-Ti gains ductility and exhibits very high stiffness-to-weight ratios with good vibration damping characteristics. The EFR debut marks the first time Gamma-Ti has been offered to the public across a range of turbine wheel sizes and at an enthusiast’s price point.
EFR Gamma-Ti Turbine wheels come in six sizes: 58mm, 63mm, 64mm, 70mm, 74mm, and 80mm OD (turbine inducer diameter) and utilize the latest generation Fullback/Superback turbine wheel blade aero designs specifically tailored for high turbine efficiency and high flow at elevated boost levels. The fullback wheel hubs employ a full aerodynamic back-disk, meaning that the hubline extends all the way to the inlet tip. This feature allows for incredibly smooth (low energy loss) guidance of exhaust flow out of the housing and into the blade channels. Going one step further, the Superback shape adds a curved profile to the backdisk and effectively lowers centrifugal stresses – improving stability at elevated rotational speeds. Impossible in the past due to material stress limitations, the combination of Gamma-Ti and the exciting new fullback/superback design works in concert to allow best possible efficiency, high speed capability and durability.
NOTE: These are NOT designed to be direct bolt-in replacement turbine housings for other mfg turbos so do NOT expect them to bolt up to your car/manifold without changes unless stated.
EFR Internal WG Fitment is application specific: most longitudinal engines such as 2JZ, SR20, RB26, will fit the Internal WG, whereas many transverse engines such as some FWD Hondas and some AWD applications will not fit the EFR internal WG. Applications prone to boost creep may prefer large external wastegates for boost levels under 7psi. exceptions to the rules confuse this. Keep an eye out for a Full-Race fitment compatibility chart coming soon!
Cold Side (Compressor)
All EFR turbochargers use Extended Tip Forged Milled Compressor Wheels ***AKA Billet Compressor Wheels*** The seven EFR compressor wheels range from 62mm OD (~50mm inducer) to 91mm OD (~67mm inducer). These Extended Tip Technology designs are unique in that they are BorgWarner’s highest-boost capable wheel designs yet still produce outstanding map width and flow capacity for efficiency at all boost levels and engine types. EFR compressor wheels are manufactured from forged aluminum for maximum strength and light weight, then CNC machined on a 6-axis CNC Mill. The blade geometry utilizes State-of-the-Art aerodynamics that delivers efficiency, boost capability and surge limits beyond any turbo we have ever seen. The forging strength exceeds that of typical aluminum billet bar-stock and also exceeds the material properties of an aluminum lost-wax compressor wheel casting. These compressors define “top shelf” in terms of strength, efficiency, range/width, and of course pressure ratio (boost) capability.
There are three compressor housing sizes and types – All housings come with the same features BOV, BSCV, V-band connection, hose clamp surfaces, etc. The first is a small compressor housing for the T25 turbos. The medium is used with the mid-sized 70mm and 76mm OD compressor wheels available. The large compressor housing is used with the 83mm and 91mm wheels. Lastly, exclusive to the large cover is a dual-machined outlet, useful for both a hose connection and/or a v-band connection. If the v-band feature is needed, the hose connection portion can be cut off and discarded. Full-Race will offer vband 90 degree bends for applications which require a tight bend, close to the turbo (such as RB26 and many Subaru rotated setups). The medium and large housings both use an inlet recirculation groove (AKA ported shroud) for maximum compressor map width and anti-surge characteristics.
All EFR turbochargers use high-end Ceramic Ball Bearings for Enhanced Turbo Response — Even though BorgWarner has been known as a long-time manufacturer of high end journal bearing turbos, the engineering team developed ceramic ball bearing cartridges for the uncompromising EFR series. EFR bearing cartridges house dual-row ceramic balls in special alloy bearing races to provide substantial friction reduction. The biggest benefits of ball bearings are most clearly realized at low turbo shaft speeds (spool-up region) and they also help improve turbocharger response/boost recovery as found between gear shifts. Once the engine is at full boost, ball bearings offer no advantage in performance – BUT – there are huge performance benefits for getting up to the desired boost level FAST and delivering quick throttle response for on-off-on-off aggressive driving. From a durability standpoint, the EFR cartridge bearing system provides a huge increase in thrust load capacity over conventional systems and requires much less oil supply. From a fuel efficiency standpoint, parasitic loss is reduced at low turbo speed so MPG increases can be realized. Lastly, the EFR bearing system includes the latest in turbo seal technology reducing oil seepage/burning problems often found in aftermarket installations (more on this later!!)
EFR bearing housings have the option for water-cooling. Water cooling is recommended where possible to do so, but not mandatory. If watercooling is not connected, be sure to use clean, high viscosity synthetic oil (15W) and do not repeatedly perform “hot engine shutdowns”.
A properly sized “restrictor” aka oil metering orifice is integrated into the bearing housing so EXTERNAL OIL RESTRICTORS SHOULD NOT BE ADDED TO EFR TURBOS. A -4AN male fitting has been provided on the EFR turbo and a -4AN (¼”) line is recommended. Oil return is tapped to 3/8 NPT as well as 2 bolt flange compatible. For runs longer than 18″ from an oil feed source, a -6AN male fitting and -6AN line is recommended.
The BorgWarner EFR turbo is set to become the new world standard for performance turbocharging due to the high-technology feature package, unbeatable performance, and installation convenience. The EFR turbocharger was designed and manufactured with only one purpose in mind: to dominate the street, track, and strip. Multiple different size turbos, optimally matched for the 250-1000hp per turbo segment – and in (4) different turbine housings are the result. The combination of this top-shelf geometry and the Gamma-Ti turbine wheel significantly raises the bar for performance aftermarket turbochargers. Combined with our ball bearing technology, it is the most responsive range or turbos that are available anywhere, at any price. The EFR series covers all applications except the hardcore drag racers. For those hardcore customers, we still offer the highly popular S400SX and S500SX product lines, and will continue to update those turbos during the next year.
Full-Race has worked closely with BorgWarner on application fitment and following the EFR launch, Full-Race EFR turbokits will be available for the following platforms:
- Subaru Rotated – EFR turbos are compatible with Full-Race’s Subaru twinscroll kit in both Internal OR External WG configurations.
- Subaru Stock Location – EFR .64 A/R singlescroll Internal WG turbos will be released by Full-Race in configurations that are bolt-in for stock location subarus **requires 3″ vband downpipe**
- Subaru BRZ / FRS – Twinscroll 7163 recommended
- Mitsubushi Evo 4G63
- Mitsubushi Evo X 4B11T
- Honda K-Series Sidemount (RSX/EP/K-Swap) – Full-Race’s “sidewinder” K series customers have a plethora of EFR turbochargers to choose from in Singlescroll or Twinscroll options and Internal OR External WGs
- Honda B-Series – EFR Twinscroll External Gate only, fits current Full-Race T4 twinscroll Top mount and T4 twinscroll Bottom mount
- Honda R18 – EFR complete turbokit
- Honda 8th gen Civic Si
- Honda 9th gen Civic Si
- Honda S2000 – EFR turbos in Internal OR External WG configurations on the brand-new forward mounted twinscroll S2000 manifold
- Nissan SR20DET – EFR Twinscroll w/ Internal OR External WGs & Singlescroll Internal WG . Fits current Full-Race Twinscroll top mount with or without WG tubes
- Nissan RB20/25/26/30 – Single turbo and Twin Turbo
- Toyota 2JZ – Twinscroll w/ Internal OR External WGs Fits current Full-Race Twinscroll top mount with or without WG tubes. **2JZ now available in smaller runner configuration for faster spool/response
- Toyota 3SGTE – Twinscroll External WG only **Exisitng Twinscroll bottom mount**
- Mustang EcoBoost
- F150 EcoBoost
- Fiesta ST / Fusion EcoBoost
For additional information and or related questions, feel free to contact us.