Introduction to the Turbonetics T3/T04E Turbo Upgrade for Your Evo

Adding a larger turbocharger is one of the most effective ways to unlock serious horsepower from your Mitsubishi Lancer Evolution’s 4G63 engine. The Turbonetics T3/T04E hybrid turbocharger has long been a staple in the performance community, known for its robust construction, excellent flow characteristics, and ability to support 400–500 wheel horsepower with proper supporting mods. Unlike a direct bolt-on upgrade, the T3/T04E requires a custom installation approach because it uses a T3 turbine flange instead of the factory Mitsubishi TD05 or TD06 flange. This article provides an in-depth, step-by-step guide to installing the Turbonetics T3/T04E on your Evo, covering everything from preparation and removal to tuning and maintenance. Whether you are a seasoned DIY mechanic or an enthusiast looking to take on a challenging project, these tips and tricks will help you complete the installation safely and effectively.

1. Preparation: Tools, Parts, and Safety

Thorough preparation is the foundation of a successful turbo installation. Gather all necessary components and tools before you begin. Rushing into the job and having to stop for missing parts leads to frustration and potential errors.

Required Parts and Hardware

  • Turbonetics T3/T04E Turbocharger – Choose the correct trim and A/R ratio for your power goals (e.g., .50 A/R compressor, .63 A/R turbine for quick spool on the 2.0L 4G63).
  • T3 Turbo Manifold – Since the stock manifold uses a Mitsubishi flange, you will need an aftermarket manifold designed for the T3 flange. Options include cast iron units from Full-Race or tubular stainless steel manifolds.
  • Oil Feed Line Kit – A braided stainless steel line with the correct fittings (typically -4AN) to connect the turbo to the engine block oil port. Include a restrictor if the T04E uses journal bearings (most do).
  • Oil Return Line Kit – -10AN or -12AN braided line and a weld-on or bolt-on drain flange for the oil pan.
  • Coolant Lines – If your T3/T04E is water‑cooled, you will need coolant feed and return lines. Many enthusiasts delete the water cooling to simplify the install, but keeping it improves turbo longevity on street cars.
  • Gaskets and Hardware – New exhaust manifold gasket, turbo-to-manifold gasket, downpipe gasket, oil drain gasket, and high‑quality stainless steel bolts / lock washers.
  • Intercooler and Piping Upgrades – The T04E compressor outlet is larger than stock. You will need a new silicone coupler and perhaps a larger intercooler core to support the increased airflow.
  • Wastegate and Downpipe – The T3/T04E requires an external wastegate (e.g., Tial MV-S or Turbosmart) unless you use an internally gated version. Plan for a new downpipe with a V-band or flanged wastegate provision.
  • Boost Controller and Gauges – At minimum, a boost gauge and a wideband air‑fuel ratio gauge are essential for tuning.

Essential Tools

  • Metric socket set (10mm, 12mm, 14mm, 17mm) with extensions and a ratchet
  • Torque wrench (e.g., 3/8‑inch drive for small bolts, 1/2‑inch for manifold nuts)
  • Pry bar and penetrating oil (WD-40 or PB Blaster) for stubborn exhaust bolts
  • Line wrenches for hard fuel and oil lines
  • Jack and jack stands or a lift
  • Safety glasses and heat‑resistant gloves
  • Shop towels and a small drain pan for coolant and oil

Safety and Workspace

Work in a clean, well‑ventilated area. Disconnect the negative battery terminal to avoid accidental short circuits or arcing. Allow the engine to cool completely before beginning any work. The exhaust manifold and turbo will be extremely hot after running. Use proper lifting equipment – never rely solely on a jack to support the vehicle. Place wheel chocks behind the rear wheels and ensure the Evo is on level ground.

2. Removing the Stock TD05 / TD06 Turbo

Removing the factory turbocharger is a straightforward process if you take your time and stay organized. Label all hoses and connectors with tape and a marker. This will save hours of headache during reassembly.

Step 1: Drain Coolant and Oil

To avoid spills when disconnecting the coolant and oil lines, it is wise to drain the coolant from the radiator drain plug and remove the oil filter housing drain plug (or simply wait for the oil to drain during an oil change). Catch fluids in an approved container and dispose of them responsibly.

Step 2: Remove Intake and Exhaust Components

  • Remove the intake pipe and air filter box. Unplug the mass airflow sensor (MAF) and set the assembly aside.
  • Disconnect the intercooler piping from the compressor outlet. You may need to remove the front bumper or intercooler shroud to access the piping.
  • Unbolt the downpipe from the turbine housing and the catalytic converter. Two bolts at the turbo flange and two at the cat are typical. Apply penetrating oil to the nuts the night before if possible.
  • Disconnect the O2 sensor wiring and any other sensors attached to the downpipe.
  • Remove the heat shield that protects the turbo and manifold (three or four 10mm bolts).

Step 3: Disconnect Oil and Coolant Lines

The stock oil feed line comes from the oil filter housing. Use a line wrench to loosen the banjo bolt. Have a rag ready to catch residual oil. The oil return line is a rubber hose that connects the turbo center section to the oil pan. Clamp it off or drain it if necessary. For coolant, the Evo has two hard lines running to the turbo. Unbolt them at the turbo side. Some coolant will spill – that is normal. Plug the open lines with small rubber caps to keep dirt out.

Step 4: Unbolt the Stock Manifold and Turbo

The manifold is held to the cylinder head with nine nuts (8mm or 10mm, depending on the year). Use a deep socket and a long extension. Work from the outside in to relieve tension evenly. Once all nuts are removed, carefully lift the manifold and turbo assembly out of the engine bay as one unit. This is easier than separating the turbo from the manifold while in the car. Be mindful of the turbo’s weight – ask a helper if needed.

Step 5: Inspect the Cylinder Head and Manifold

With the stock assembly on your bench, inspect the cylinder head exhaust ports for carbon buildup or damage. Check the manifold studs – they often snap during removal. If any are broken, use an extractor or have a machine shop remove them. Clean the head surface with a razor blade and brake cleaner. Also carefully inspect the oil and coolant passages for debris. Flush them with compressed air if necessary.

3. Preparing for the T3/T04E Installation

Selecting and Modifying the Manifold

Your new T3 manifold must be compatible with the 4G63 head. Popular choices include the MAPerformance cast T3 manifold or a tubular unit from Full-Race. Make sure it uses a T3 turbine flange and has provisions for an external wastegate (most do). Check manifold studs – replace them with ARP stainless steel studs for reliability. Apply anti‑seize compound to the threads.

Oil System Modifications

The T3/T04E typically requires a restricted oil feed because journal bearings can be overwhelmed by the high oil pressure of the 4G63. Install a -4AN oil feed line with a 0.040” restrictor in the fitting at the turbo inlet. The oil return line must be larger than the feed to prevent drain backup. Use a -10AN or -12AN line and weld a new bung onto the oil pan above the oil level. Some aftermarket pans already have a return bung. Do not simply tap the existing drain port; ensure the drain is gravity‑fed and slopes downward continuously.

Coolant Line Options

If you choose to keep water cooling, use -6AN braided lines from the block to the turbo. The factory coolant pipe can be reused with adapter fittings. Alternatively, you can cap the coolant ports on the block and route only oil to the turbo. This simplifies the installation but reduces long‑term bearing cooling. For a street car, maintaining the coolant circuit is recommended.

4. Installing the Turbonetics T3/T04E Turbocharger

Mounting the Manifold

Place a new exhaust manifold gasket onto the head studs. Carefully lower the T3 manifold into position. Tighten the manifold nuts in two stages: first to 20 ft‑lbs in a criss‑cross pattern, then to a final torque of 30 ft‑lbs (refer to your gasket manufacturer’s specs). Over‑torquing can warp the manifold or strip threads in the head.

Attaching the Turbo to the Manifold

Use a new gasket between the turbine housing and the manifold flange. Bolt the turbo onto the manifold with the supplied hardware. Typically, this is a two‑stud or four‑stud connection. Tighten evenly to 35 ft‑lbs. Ensure the compressor housing is clocked so the outlet faces the intercooler pipe and the oil return port points downward (or within 10 degrees of vertical). Loosen the v‑band clamp on the center housing if you need to rotate the compressor cover. Be careful not to damage the compressor wheel.

Connecting Oil Feed and Return

Attach the oil feed line to the turbo center section. Use new copper washers on banjo fittings. Tighten by hand plus a ¼ turn with a wrench – do not overdo it. Then route the feed line to the oil filter housing port. Use a tee fitting if you also feed a turbo timer or other accessory. Secure the line away from heat sources with zip ties on existing brackets.

For the return line, fit the -10AN hose onto the drain flange on the turbo. Route it to the oil pan bung with a smooth downward slope. Avoid tight bends. Use a 45° or 90° fitting at the pan if needed. Clamp the hose securely. A kinked return line will cause oil to back up into the turbo seals, leading to smoke and failure.

Coolant Line Installation

If using coolant lines, connect them the same way – a feed from the block (or a coolant tap) and a return to the thermostat housing or radiator. Purge the system of air by loosening the bleeder screw on the upper radiator hose while the engine warms. Take extra care to ensure the new coolant lines do not rub against the manifold or frame.

Wastegate and Boost Control

Mount your external wastegate to the manifold’s wastegate flange. Use a gasket and tighten to 25 ft‑lbs. Connect a boost source line from the compressor cover or a dedicated port on the intercooler pipe to the wastegate diaphragm. For a manual boost controller, tee off that line. For electronic boost control, run a line from the turbo to the solenoid, then another line to the wastegate.

Intercooler Piping and Downpipe

Attach the compressor outlet to your intercooler piping using a high‑quality silicone coupler and T‑bolt clamps. The T04E has a 3” outlet, so modify your piping accordingly. Install the O2 sensor in the new downpipe. The downpipe should be bolted to the turbine outlet (often a 4‑bolt T3 flange) and supported with a bracket to prevent stress on the turbo.

5. Post‑Installation Checks and Initial Start‑Up

Double‑Check Everything

Before reconnecting the battery, inspect every connection. Tighten all coupler clamps. Make sure no tools or rags are left in the engine bay. Turn the engine over by hand a few revolutions using a socket on the crank pulley. This will confirm that the turbo compressor wheel is not hitting the housing and that the engine rotates freely.

Priming the Turbo with Oil

To avoid dry start‑up damage, you must pre‑lube the turbo bearings. The best method is to disconnect the coil pack or fuel pump relay, then crank the engine for about 10 seconds. Oil will flow from the feed line and enter the turbo. Reconnect the coil pack/fuel pump, start the engine, and let it idle immediately. Watch the oil pressure gauge – it should climb to normal levels within seconds.

Leak Testing

With the engine idling, listen for exhaust leaks at the manifold and downpipe flanges. A huffing sound indicates a leak that must be fixed. Use a soapy water spray bottle on all air intake connections – bubbles show boost leaks. Also inspect oil and coolant lines for drips. Tighten any fittings that show weeping.

Initial Break‑In Procedure

Allow the engine to reach operating temperature (coolant and oil). Do not rev past 2500 RPM for the first 10 minutes. Then perform a series of gentle acceleration runs to seat the piston rings if you also rebuilt the engine. For the turbo itself, vary the boost gradually. Avoid sustained high boost until the system has been fully tuned.

6. Tuning Your Evo for the T3/T04E

A larger turbocharger will drastically change your engine’s air‑fuel ratio and timing requirements. Tuning is mandatory – driving on a stock calibration with this turbo can cause detonation and catastrophic engine failure.

Engine Management Options

  • ECUFlash + Tactrix OpenPort 2.0 – Reflash the factory ECU with a custom map. This is the most cost‑effective solution for Evo 8/9 owners, provided you have a reliable base map from a tuner.
  • Standalone ECU – Systems like AEM Infinity, Haltech Elite, or MoTeC give full control over fuel, ignition, boost control, and auxiliary functions. They are ideal for built engines and aggressive power goals.
  • Piggyback – Not recommended for a turbo upgrade this large. Piggyback systems lack the resolution and safety features required for a high‑power 4G63.

Key Tuning Parameters

  • Air‑Fuel Ratio (AFR) – Target 11.5–12.0:1 under full boost for a safe street tune. Leaner mixtures increase power but risk detonation.
  • Ignition Timing – Reduce timing as boost increases. A good starting point is 10–12° BTDC at peak torque, advancing to 15–18° near redline. Consult your tuner for final numbers.
  • Boost Curve – The T3/T04E typically reaches full boost around 3500–4000 RPM. Use a boost controller to set a safe maximum (16–20 psi for pump gas).
  • Fuel Injectors – The stock 560cc injectors will be inadequate. Upgrade to at least 1000cc injectors (or larger if using E85) and a higher‑flow fuel pump (e.g., Walbro 450).

Wideband O2 Sensor

Install a wideband air‑fuel ratio gauge in the downpipe before the catalytic converter. This is the most critical tool for tuning and for real‑time monitoring while driving. Do not rely on the factory narrowband sensor – it cannot provide the resolution needed for WOT tuning.

If you are not confident in your tuning ability, hire a professional with experience on the 4G63 platform. A poorly tuned car can destroy pistons, rods, and your new turbo in minutes. Reputable shops like Engine Machine or local Evo specialists can save you thousands in repairs.

7. Maintenance and Long‑Term Reliability

Oil Change Intervals

With the T3/T04E generating more heat and stress, reduce your oil change period to every 2,000–3,000 miles using a high‑quality fully synthetic oil such as Mobil 1 5W‑30 or Motul 300V. The turbo bearing clearances are tight, and dirty oil will cause coking and premature wear.

Turbo Timer

Consider installing a turbo timer to let the engine idle for 30–60 seconds after hard driving. This allows the oil to circulate and cool the turbo bearings before shutdown, preventing oil from cooking inside the center section.

Supporting Upgrades

  • Upgraded Intercooler – A larger core (e.g., 3” thick) reduces intake air temperatures and keeps the turbo from heat‑soaking the charge air.
  • Boost Leak Check – Perform a boost leak test every six months. Silicone hoses and couplers can develop cracks.
  • Exhaust System – A 3” turboback exhaust is essential for the T04E to breathe properly. Stock exhaust creates severe backpressure.
  • Clutch – The stock clutch will slip once you exceed 350 ft‑lbs of torque. Upgrade to a twin‑disc or a heavy‑duty single disc from ACT or Exedy.

Conclusion

Installing the Turbonetics T3/T04E turbo on your Mitsubishi Evolution is a substantial project that demands mechanical skill, careful planning, and a willingness to invest in proper supporting modifications. When executed correctly, the result is a responsive, powerful street machine that can hold its own on both the street and track. By following the tips and tricks outlined in this article – from meticulous preparation and removal to thoughtful tuning and maintenance – you can avoid common pitfalls and enjoy thousands of miles of reliable performance. Always remember that safety comes first: take your time, use quality parts, and never skip the tuning step. For further reading, consult the installation guide on the Turbonetics official website and join discussions on forums like EvolutionM.net to learn from those who have been through the process. Happy boosting!