** Now comes with options of EcuTek Base Map and Pre-Welded Engine Oil Pan ** 

Tomioka Racing turbocharger kit is all-in-one solution to increase power for Subaru BRZ, Scion FRS and Toyota 86. The kit comes with TD05-20G billet wheel turbocharger and billet waste-gate actuator. The billet compressor wheel increases airflow to the turbo compared to traditional turbo wheel. In addition, the billet waste-gate actuator ensures boost level to hold at high RPM. During dyno tuning, the kit shows over 65% improvement in peak power and substantial power and torque gain in all RPM range. Included in the kit are exhaust manifold, downpipe, front mount intercooler, air intake with filter, charge pipes, blow- off valve and other necessary hardware.

 

Do you need more Motul 300v? Add some more HERE! 

 

Characteristics:

• Billet Wheel Turbocharger TD05-20G
• Billet Wastegate Actuator
• Blow Off Valve Option
• 4-2-1 Exhaust Manifold
• Air Intake
• Downpipe
• Front Mount Intercooler
• Power & Torque Gain in all RPM Range

Kit Contents:

• Turbocharger
• Front Mount Intercooler
• Exhaust Manifold
• Charge Pipe
• Blow Off Valve
• Air Intake
• All Necessary Hardware to Install
• OMNI 3 bar MAP Sensor 
• Motul 300V 2L

** Off Road Use Only. This product or products may not comply with some State, Federal, Provincial and/or Local laws, ordinances, regulations or emissions. The buyer takes full responsibility of the use of these products on their automobile which may or may not conform to all applicable laws and regulations for on road or highway use.** 

Wastegate actuator spring choice: 1.1 bar vs 1.3 bar (what customers need to know)
What the spring actually controls (and why it matters)

On a pneumatic internal wastegate, the actuator spring sets your gate pressure (often called base boost): the boost level where the wastegate starts to open because boost pressure overcomes spring force. Haltech describes it simply: changing spring pressure changes the default boost pressure, and when boost exceeds spring pressure the valve opens and begins regulating boost.

Choose 1.1 bar (16.1 psi) / Red if:

You want a lower boost map (street/traction/valet) around the mid-teens. Remember: you can’t go under the spring.

Your normal target boost is roughly 18–22 psi and you want good controller authority and flexibility.

You’re building a setup where drivability and multiple boost modes matter (daily + weekend map).

Choose 1.3 bar (19.1 psi) / Silver if:

You will not run low boost—your “low boost” is still ~19 psi or higher. (If you need 15–17 psi sometimes, don’t pick this.)

Your normal target boost is roughly 22–28 psi and you want:

less “work” from the boost control system to hit target, and

typically better resistance to the wastegate being pushed open early (especially in higher load / backpressure situations).

There are two different “maximum boost” questions people ask:

1) Maximum boost your boost control can hold consistently

Using the GFB rule-of-thumb (target boost ≤ ~2× gate pressure) :

With a 1.1 bar / 16.1 psi spring, the “control stability ceiling” is roughly ~32 psi (2 × 16.1).

With a 1.3 bar / 19.1 psi spring, the “control stability ceiling” is roughly ~38 psi (2 × 19.1).

Reality check: that does not mean “safe to run 32–38 psi.” It means beyond ~2× gate pressure, boost control tends to get inconsistent because the actuator isn’t receiving enough meaningful reference signal for correction. GFB explains that once you go beyond double, boost control becomes less stable and more affected by variables like RPM/load/backpressure.

2) Maximum boost your turbo/engine can safely run

That’s not spring-limited. It’s limited by:

turbo efficiency and speed/heat,

fuel quality and knock margin,

intake temps/intercooling,

exhaust backpressure,

engine/clutch/trans limits,

tuner strategy.

FAQ:

Can I run less boost than the spring rating?
No. Spring pressure is the lowest boost level you can reach.

Does a stiffer spring automatically mean higher peak boost?
Not automatically. It mainly raises minimum boost and changes how the wastegate behaves. Boost above spring comes from the control strategy.

Why do people say “don’t exceed 2× the spring”?
Because boost control gets less stable as target boost gets too far above gate pressure; beyond ~double you tend to lose correction authority.

What spring gives the best spool and boost stability?
A spring that puts gate pressure about 10–20% under your target boost is a strong general guideline for best performance.