THE 4.0L V6 SUPERCHARGER KIT
THE 4.0L V6 SUPERCHARGER KIT
THE KEY FEATURES OF THE 4.0L V6 SUPERCHARGER ARE:
- 304 HP and 334 lb/ft of torque- Air to liquid intercooler
- Uses original ECU with Toyota supported reflash
- High flow fuel injectors
- One piece integral supercharger-manifold construction
- 50 state emission legal
TRD’s most popular supercharger up until now has been the 3.4L V6 supercharger for the previous generation Tacoma. The new 4.0L V6 supercharger is even better ad it is on sale now. It is designed to fit both the current generation V6 Tacoma and the FJ Cruiser. It’s a completely new design and for the first time incorporates an intercooler and a Toyota supported reflash of the factory engine control unit.
DESIGN
Like the earlier V6 design, the new 4.0L supercharger uses Eaton Roots-type rotating components in a one piece supercharger plenum/manifold casting. The size of the casting is compact and good hood clearance is maintained in both the Tacoma and the FJ. The OE throttle body bolts up in its original location, and all the OE hose connections are accommodated.
INTERCOOLER
The heat exchanger core for the intercooler is located inside the plenum section of the manifold. It is sealed by o-rings that fit into machined grooves in the casting. The inlet and outlet for the intercooler coolant are located on the top of the supercharger assembly near the firewall of the vehicle. Hoses connect the heat exchanger core to a separate intercooler reservoir and mounts in front of the vehicle’s engine radiator and AC condenser. A high-quality continuous-duty electric circulation pump is used that is actually integrated with the coolant reservoir. The low temperature radiators are made of aluminum and they are custom fitted to the Tacoma and the FJ since they each have slightly different space and mounting requirements.
By using the intercooler, the inlet temperature to the engine is reduced allowing use of a more aggressive ignition timing map with the relatively high 10.0 to 1 compression ration of the 1GR 4.0L V6 engine. This results in better engine response and power output. It also provides better resistance to detonation and a greater safety margin under severe duty use. 91 octane fuel is required. For safety’s sake, the engine map developed for the supercharger will allow the engine to run on 87 octane, but the power output will suffer as the ECU retards the ignition timing to prevent detonation.
FUEL SYSTEM
New 455cc injectors are supplied with the supercharger to deliver the extra fuel required for the increased power output. The original fuel pump is retained and the fuel pressure is unchanged from stock. New iridium spark plugs are also supplied that are of slightly colder heat range than the original plugs for better resistance to detonation.
DRIVE SYSTEM
Obstruction on the front of the 1GR engine prevent using the OE serpentine belt path to drive the supercharger as has been done on all previous designs. Because of this, the 1GR supercharger is supplied with a secondary drive pulley, serpentine belt and tensioner along with the required idler pulleys.
ECU
For the first time, the necessary recalibration of the factory Engine Control Unit for the use with a TRD supercharger is completely integrated. TRD developed the map for the supercharger using the Toyota factory calibration tools exclusively. This allowed a very precise and robust calibration to be developed that was then able to be incorporated into the factory ECU update system. Toyota dealers can use the Toyota Tech Stream System to reflash the ECU when the supercharger is installed without any additional hardware or software required. In addition, any subsequent factory updates to a particular year-model vehicle that has a TRD supercharger can be done completely seamlessly.
POWER
The 1GR supercharger output is rated at 304HP @ 5,400 RPM and 334lb/ft of torque at 3,600 RPM at the flywheel. For the first time, TRD used the SAE test standard J1349 to establish these power ratings. The process is very similar to that used by the OE manufacturers to establish the power rating on new vehicles. The test takes place at an approved facility (in this case Mahle Powertrain in Novi, MI) and is conducted under the in-person supervision of an SAE engineer to exacting standards. The purpose is to create a rating that is repeatable under real world conditions. It takes into account all the parasitic losses of the accessories driven by the engine such as the fan, alternator, power steering, etc., as well as the operating temperature of the engine coolant and oil in addition to the atmospheric conditions at the time of the test. The result is a conservative, certified net power output number. That is considerably different, and we think more reliable than the “best pull on the best day” dyno runs used y may performance aftermarket companies to rate their products.
EMISSIONS
The 1GR supercharger is 50-state emission legal. This is accomplished by testing done at a lab certified by the California Air Resources Board who then reviews the results and issues an Executive Order which is recognized by all other states. This is the only aftermarket level emission certification however, meaning that the supercharger may not be installed on a new vehicle prior to sale or by prior arrangement at the time of sale and may not be financed together with the new vehicle.
OTHER DETAILS
The supercharger sold as a main assembly with a separate “fit kit” required for the Tacoma and the FJ Cruiser. The part numbers are:
PTR29-35090 4.0L V6 Supercharger Main AssemblyPTR29-35093 FJ Cruiser Fit Kit, 2007-2009
PTR29-35100 Tacoma Fit Kit, All V6, 2005-2010
The Manufacturer’s Suggested Retail Price for the complete supercharger with fit kit is $4,500. The warranty is the same as the Toyota Powertrain Warranty of up to y years or 60,000 miles or the remainder of the powertrain warranty at the time of the installation when installed by a Toyota dealer. Installations by anyone other than a Toyota dealer carry a 12 month/12,000 mile parts only warranty. Please see the warranty section of TRD site for details.
