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URD Mk3 Supercharger Kit for 2005-2009 4Runner Stage 3

URD Mk3 Supercharger Kit for 2005-2009 4Runner Stage 3
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URD Mk3 Supercharger Kit for 2005-2009 4Runner Stage 3

URD worked with a new start up company, iTronix Technologies, to meet our specific needs with a highly advanced self tuning engine management system for our high power supercharger kits.  It is called the UCON Flex.

iTronix exceeded our expectations and developed an EMS that is significantly better than what we had been using.

Key Features:

  • More power than any other supercharger system
  • Rotrex C38-81 Supercharger
  • Advanced Engine Management using UCON Flex by iTronix Technologies
  • Huge 61# fuel injectors and 255 LPH fuel pump
  • Silent Operation
  • Turbo style blow off valve
  • Large air-air intercooler
  • Outstanding fit and finish
  • Easy installation
  • Off road snorkle compatable
  • Off road winch bumper friendly

Kit includes:

  • Rotrex C38-81 Supercharger w/80mm pulley
  • Self contained Rotrex oil system with large oil cooler
  • Custom length drive belt
  • Precision charge piping made from mandrel bent aluminum
  • URD 255 LPH fuel pump/filter kit
  • Denso IKH24 Iridium Power spark plugs
  • All stainless fasteners where possible
  • All silicone couplers with quaility stainless liner clamps
  • HKS SSQV turbo style blow off valve
  • Drive belt idler pulley
  • URD supercharger mounting bracket
  • URD custom air fillter box with large panel type filter
  • High volume 61# fuel injectors with adapter harnesses
  • Advanced engine management using UCON Flex self tuning engine management system
  • Exhaust cam timing gears
  • Very detailed installation instructions 

URD has released our supercharger system for the 4th Gen Toyota 4runner.  This kit fits the 2005-2009 Toyota 4Runner V6.

This system features a large air-to-air intercooler to cool the compressed air from the supercharger for greater power potential.  The mounting of the intercooler is high in the grill area to make it more compatible with off road winch bumpers.

Our development vehicle was a 2006 Toyota 4runner 4x4 with an automatic transmission.  The stock vehcile dynoed at 201 Rear Wheel Horse Power (RWHP).  The basic kit, Stage I, put down 355 RWHP and retains OEM quality driveability.  The system is completely silent in operation and still gets the same MPG as the stock 4Runner.

The key to producing this power level safely is in depth calibration work using highly advanced engine management and a properly configured fuel delivery system.  For engine management the kit uses the UCON Flex from iTronix Technologies.  This Advanced Engine Management System is self tuning with active dynamic air fuel ratio correction.  The UCON also has engine protecting engine guardian features.  If things start to go wrong the guardian features step in toprotect the engine.  If the air fuel ratio deviates from the programmed value and the dynamic active fuel control cannot correct it, the guardian will depower the engine to protect it.  The guardian feature also steps in if the engine begans to overheat and we also program it to limit the maximum RPM until the engine is properly warmed up.

The fuel system includes a large 255 liter per hour fuel pump that is installed in the fuel tank and high flow fuel injectors that are more than twice the flow rate of the stock ones.  These upgrades are required to ensure a sufficient supply of fuel is delivered to the engine as commanded by the UCON Flex Advanced Engine Management System.

URD has chosen the highly efficient Rotrex C38-81 supercharger as the center of this supercharger system.  The Rotrex is most advanced supercharger design on the market today.  It features a small compact foot print with almost completely silent operation, with a very highly efficient traction roller drive system that will spin the turbo type impeller 7.5 times faster than the belt drive pulley is turned.  This high step up ratio and small diameter turbo style impeller brings boost in sooner than other more common types of centrifugal superchargers.  This gives you very nice off the line performance combined with unmatched top end power.  The Rotrex Supercharger features it own self contained oiling system using Rotrex's proprietary traction oil that is the key to the advanced traction drive system.  Rotrex warranties thier superchargers with an industry leading three year UNLIMITED mileage warranty.

The air intake system brings in cool air from the stock location in the fender wall and into URD's custom high flow air filter box with a very large flat panel air filter for unrestricted flow into the supercharger.  In our earlier supercharger systems, the only complaint was the system was not compatible with the popular off road snorkel systems.  This oversight was corrected with the new Mark III version.  You can easily adapt it to your favorite snorkel system, but you may have a reduction in peak power with the added restriction to the intake.

The overall operation of the supercharger system is nearly completely silent, but we have added a turbo style blow off valve will announce that your 4Runner is indeed boosted.  When the throttle is suddenly closed when the engine is at high RPM like shifting gears with boost, the blow off valve will cycle with a very crisp note typical of high performance turbo systems.  It is always a crowd pleaser!!

The kit includes all the needed brackets, parts, and fasteners to allow a trouble free, no hassle installation.  We include high quality stainless fasteners and all the parts have a high quality wrinkle black powder coating finish that will last and looks fantastic.  The piping is all mandrel bent high quality aluminum they fit like they are supposed to.  Only the best in kit components are used.

The installatiion on the 4Runner is very straight forward and the only modification to the vehicle require is some slight trimming of the forward skid plate. 

We made every effort to make the system compatible with off road winch bumpers.  We can't guarantee compatibility with all bumpers on the market, but we did test fit it with the popular bumper from Demello Off-Road and a slight amount of trimming to the internal brackets was all that was needed for a perfect fit.  No permanent modifications required to install this system and it can be easily removed when you decide to sell or trade your 4Runner for a new one.  

The 4Runner and FJ Crusier share the same engine, power train, and most of the frame is the same.  The below video is of an FJ Crusier with our original Mk1 supercharger system and producing about 50 RWHP less than our current 4Runner Mk3 stage 1 kit. 

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