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    • RR-Racing supercharges the Lexus RC-F & GS-F 2UR-GSE 5.0 liter V8 - 568 wheel horsepower

      The Lexus RC-F and GS-F quite frankly need a supercharger. The tired naturally aspirated 5.0 liter V8 under the hood can not compete with its German competition. Even modern turbo six-cylinder motors are making far more power and torque.


      Just look at the baseline figure. 401 horsepower at the wheels. BMW topped this with the 5.0 liter S85 V10 over a decade ago. As did Mercedes-AMG with their M156 6.2 liter V8. Lexus is over a generation behind.

      Fortunately, for Lexus owner who do not want to get embarrassed (they still will lose badly to a tuned E63, M5, M3, M4, RS7, or you name it) RR-Racing has a beautiful supercharger kit.

      The Rotrex centrifugal blower ups output to 568 horsepower and 451 lb-ft of torque at the wheels:


      A massive gain. However, to put it in relatable terms this is less power than a BMW M3 4.0 liter S65 V8 outputs with a blower. A lot less power.

      It's better than nothing though and at least makes it so the RC-F or GS-F look like they belong in a modern performance discussion. RR-Racing's engineering work also deserves tremendous praise.









      We are excited to announce that after over a year in development and testing, multiple track days, desert testing, and over 10,000 miles of punishment and tuning, we are finally ready to release our RC F/GS F Supercharger kit! Our goal for this kit was to maintain stock drivability and reliability, while creating smooth, seamless, and unrelenting supercar levels of power that these great car deserves.

      RR670 Kit Specifications:

      - Power: For the base "RR670" kit, our customers can expect to make about 670hp at the crank, or 560 to 570whp (wheel horsepower on a Dynojet dyno, SAE correction -- see Dyno result chart in the product photos gallery) at approximately 6psi peak boost pressure, 93 pump gas, equipped with standard PPE headers and a high flow dual exhaust.

      - Tuned ECU: We have logged countless development hours perfecting our ECU tune for the RC F for ultimate reliability and drivability. No piggybacks or other BS! We have extensively developed the mapping of the stock ECU, modifying literally hundreds of maps and adding additional functionality to the fueling system that allows us to support up to 570whp without fuel system modifications.

      - Supercharger: Rotrex Supercharger, c38-91 (largest Rotrex SC). Rotrex SC's are extremely efficient and quiet due to their planetary drive system which spins up to 90,000 rpm, much like a turbocharger.

      - Dedicated Drive System: Rather than using the accessory belt to drive the SC, we designed a dedicated drive system that allows us to achieve the necessary belt tension for a reliable SC drive, without overstressing the alternator, water pump, and AC bearings.

      - Custom Harmonic Crank Damper: There are some overpriced Japanese SC's on the market for the ISF/RCF that eliminate the factory harmonic damper crank pulley and replace it with a simple machined aluminum pulley. We find this simply unacceptable! Working in conjunction with ATI Performance, we developed a custom tuned harmonic damper than drives the SC belt. The ATI damper has been specially developed to dampen the harmonics of the 2UR-GSE engine at high horsepower levels for the ultimate in engine reliability.

      - Billet Tensioner System: Most SC kits on the market use OEM belt tensioners, but we took that a step further by developing a billet belt tensioner that is both more reliable and is able to apply significantly higher belt tension than conventional off the shelf tensioners. For added reliability we use Gates Racing Kevlar drive belts and our own double bearing billet idler pulleys.

      - Dual "Big Bubba" billet blow off Valves: We use not one, but TWO Turbosmart "Big Bubba" 2" blow off valves. Adequate venting is essential for SC responsiveness, reliability, and drivability.

      - Custom Air/Air Intercooler: We use a large 4.5"x12"x10" intercooler core. These intercoolers are extremely high quality and are manufactured in the USA by Bell Intercoolers.

      - Genuine Carbon Fiber Intake Tubing: All visible intake tubing is made from genuine twill weave carbon fiber for an amazing look and function!

      This article was originally published in forum thread: RR-Racing supercharges the Lexus RC-F & GS-F 2UR-GSE 5.0 liter V8 - 568 wheel horsepower started by Sticky View original post
      Comments 4 Comments
      1. 93siro's Avatar
        93siro -
        It took these guys 8 years to come up with a na tune. Quickly after figuring out how to deal with the dme, they had the supercharger kit done. They deserve credit.
      1. Sticky2's Avatar
        Sticky2 -
        Click here to enlarge Originally Posted by 93siro Click here to enlarge
        It took these guys 8 years to come up with a na tune. Quickly after figuring out how to deal with the dme, they had the supercharger kit done. They deserve credit.
        True. However, a centrifugal is literally the easiest forced induction setup to tune for.
      1. Bowser330's Avatar
        Bowser330 -
        To be fair sticky you're comparing this stage 1 newbie supercharger build which is on 93 octane and 6psi to a well developed veteran level platform that was running straight e85 with upgraded fuel system running 10 psi... not apples to apples....
        im pretty sure 568whp is pretty solid for 93 octane and 6psi, I mean it's got an extra 25% displacement so it's gotta be comparable

        http://www.m3post.com/forums/showthread.php?t=531410

        As you well know dlsj5's car one of the most documented cars out there, he's been amazing to the s65 supercharged community.

        Bmw 4.0 v8
        558whp SAE
        7.15 psi
        95 octane

        Lexus 5.0 v8
        568whp SAE
        6psi
        93 octane
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Bowser330 Click here to enlarge
        To be fair sticky you're comparing this stage 1 newbie supercharger build which is on 93 octane and 6psi to a well developed veteran level platform that was running straight e85 with upgraded fuel system running 10 psi... not apples to apples....
        It has another liter...