{"product_id":"tomioka-racing-wrx-forester-fa20dit-oem-turbo-upgrade-direct-replacement-gtx29-turbocharger-2015-wrx-2014-forester","title":"Tomioka Racing WRX\/Forester FA20DIT OEM Turbo Upgrade - Direct Replacement GTX29 Turbocharger (2015+ WRX, 2014+ Forester)","description":"\u003cp class=\"whitespace-pre-wrap break-words\"\u003eThe perfect solution for upgrading or replacing your aging factory turbocharger, this direct-fit Tomioka Racing turbo delivers OEM reliability with enhanced performance potential. Built with premium journal ball bearings and featuring a 20% larger billet compressor wheel with 17% longer blades, this turbo ensures both longevity and improved airflow over the stock unit. The matched porting and TR billet wastegate actuator maintain factory-like spool characteristics while offering headroom for additional power when desired.\u003c\/p\u003e\n\u003cp class=\"whitespace-pre-wrap break-words\"\u003eWhether your factory turbo is showing signs of wear or you're proactively seeking a more robust replacement, this upgrade provides peace of mind with its superior build quality and expanded performance capabilities. Quick spooling characteristics ensure a seamless transition from your stock turbo, while the enhanced design supports higher power levels without sacrificing daily drivability. Installation is straightforward with all necessary fittings and gaskets included, making it an ideal choice for those looking to replace their factory turbo with a more capable unit.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable style=\"width: 410px;\" height=\"273\" width=\"363\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 229.915px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eBearing Type:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 165.199px;\"\u003e\n\u003cp\u003eBall Bearing\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 229.915px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eFlange Type:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 165.199px;\"\u003e\n\u003cp\u003eStandard Subaru 5-Bolts\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 229.915px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eCompressor \/ Turbine Wheel:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 165.199px;\"\u003e\n\u003cp\u003e72 mm \/ 61mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 229.915px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eTurbine Housing:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 165.199px;\"\u003e\n\u003cp\u003e10cm\u003csup\u003e2\u003c\/sup\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 229.915px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eActuator:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 165.199px;\"\u003e\n\u003cp\u003e1.03 bar \/ 15 psi\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 229.915px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eHorsepower:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 165.199px;\"\u003e\n\u003cp\u003e500 HP\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBall Bearing\u003c\/li\u003e\n\u003cli\u003eBillet Compressor Wheel\u003c\/li\u003e\n\u003cli\u003eLarger Turbine Wheel\u003c\/li\u003e\n\u003cli\u003e100% Bolt-On\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e2015+ Subaru WRX\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e2014+ Subaru Forester (FA20DIT)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eKit Contents:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTurbocharger\u003c\/li\u003e\n\u003cli\u003eGaskets\u003c\/li\u003e\n\u003cli\u003eHardware Kit\u003c\/li\u003e\n\u003cli\u003eMotul 300V Competition 2L\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWastegate actuator spring choice: 1.1 bar vs 1.3 bar (what customers need to know)\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eWhat the spring actually controls (and why it matters)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOn 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.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eChoose 1.1 bar (16.1 psi) \/ Red if:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou want a lower boost map (street\/traction\/valet) around the mid-teens. Remember: you can’t go under the spring.\u003c\/p\u003e\n\u003cp\u003eYour normal target boost is roughly 18–22 psi and you want good controller authority and flexibility.\u003c\/p\u003e\n\u003cp\u003eYou’re building a setup where drivability and multiple boost modes matter (daily + weekend map).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eChoose 1.3 bar (19.1 psi) \/ Silver if:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou 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.)\u003c\/p\u003e\n\u003cp\u003eYour normal target boost is roughly 22–28 psi and you want:\u003c\/p\u003e\n\u003cp\u003eless “work” from the boost control system to hit target, and\u003c\/p\u003e\n\u003cp\u003etypically better resistance to the wastegate being pushed open early (especially in higher load \/ backpressure situations).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThere are two different “maximum boost” questions people ask:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e1) Maximum boost your boost control can hold consistently\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUsing the GFB rule-of-thumb (target boost ≤ ~2× gate pressure) :\u003c\/p\u003e\n\u003cp\u003eWith a 1.1 bar \/ 16.1 psi spring, the “control stability ceiling” is roughly ~32 psi (2 × 16.1).\u003c\/p\u003e\n\u003cp\u003eWith a 1.3 bar \/ 19.1 psi spring, the “control stability ceiling” is roughly ~38 psi (2 × 19.1).\u003c\/p\u003e\n\u003cp\u003eReality 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.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2) Maximum boost your turbo\/engine can safely run\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThat’s not spring-limited. It’s limited by:\u003c\/p\u003e\n\u003cp\u003eturbo efficiency and speed\/heat,\u003c\/p\u003e\n\u003cp\u003efuel quality and knock margin,\u003c\/p\u003e\n\u003cp\u003eintake temps\/intercooling,\u003c\/p\u003e\n\u003cp\u003eexhaust backpressure,\u003c\/p\u003e\n\u003cp\u003eengine\/clutch\/trans limits,\u003c\/p\u003e\n\u003cp\u003etuner strategy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFAQ:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I run less boost than the spring rating?\u003c\/strong\u003e\u003cbr\u003eNo. Spring pressure is the lowest boost level you can reach.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes a stiffer spring automatically mean higher peak boost?\u003c\/strong\u003e\u003cbr\u003eNot automatically. It mainly raises minimum boost and changes how the wastegate behaves. Boost above spring comes from the control strategy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy do people say “don’t exceed 2× the spring”?\u003c\/strong\u003e\u003cbr\u003eBecause boost control gets less stable as target boost gets too far above gate pressure; beyond ~double you tend to lose correction authority.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat spring gives the best spool and boost stability?\u003c\/strong\u003e\u003cbr\u003eA spring that puts gate pressure about 10–20% under your target boost is a strong general guideline for best performance.\u003cbr\u003e\u003c\/p\u003e","brand":"Tomioka Racing (TR)","offers":[{"title":"Default Title","offer_id":46718950473891,"sku":"TR-TS1042","price":1905.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/3398\/7235\/files\/VA_Turbo_1.png?v=1767649796","url":"https:\/\/wiscomotors.com\/products\/tomioka-racing-wrx-forester-fa20dit-oem-turbo-upgrade-direct-replacement-gtx29-turbocharger-2015-wrx-2014-forester","provider":"Wisco Motors","version":"1.0","type":"link"}