{"product_id":"tr-td05-18g-bolt-on-turbo-stock-replacement-for-subaru-wrx-2002-2007-and-sti-2002-2010-w-billet-actuator","title":"TR TD05-18G Bolt On Turbo Stock Replacement for Subaru WRX 2002-2007 and STI 2002-2010 w\/ Billet Actuator","description":"\u003cp\u003eThe TR TD05-18G Turbo is the one of the best turbo upgrade for your street car. The turbo characteristics are very similar to factory VF42 turbo but with an increased spool rate and capacity to handle power upwards of 350WHP so it makes a great addition to your engine if you are planning to keep your car daily driver friendly. The turbo comes with all fitting and gaskets, ready to bolt on out of the box.\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eTurbo Characteristics\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable style=\"height: 198.515px;\" width=\"500\" cellpadding=\"0\" cellspacing=\"0\" border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5898px;\"\u003e\n\u003ctd style=\"height: 19.5898px;\" bgcolor=\"#CCCCCC\" colspan=\"2\"\u003eBearing Type:\u003c\/td\u003e\n\u003ctd style=\"height: 19.5898px;\" bgcolor=\"#CCCCCC\"\u003eJournal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5898px;\"\u003e\n\u003ctd style=\"height: 19.5898px;\" colspan=\"2\"\u003eFlange Type:\u003c\/td\u003e\n\u003ctd style=\"height: 19.5898px;\"\u003eStandard Subaru 5-Bolts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5898px;\"\u003e\n\u003ctd style=\"height: 39.1796px;\" bgcolor=\"#CCCCCC\" width=\"100\" rowspan=\"2\"\u003eCompressor Wheel\u003c\/td\u003e\n\u003ctd style=\"height: 19.5898px;\" bgcolor=\"#CCCCCC\" width=\"36\"\u003eIn:\u003c\/td\u003e\n\u003ctd style=\"height: 19.5898px;\" bgcolor=\"#CCCCCC\" width=\"364\"\u003e50.3 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5898px;\"\u003e\n\u003ctd style=\"height: 19.5898px;\" bgcolor=\"#CCCCCC\"\u003eEx:\u003c\/td\u003e\n\u003ctd style=\"height: 19.5898px;\" bgcolor=\"#CCCCCC\" width=\"364\"\u003e68 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5898px;\"\u003e\n\u003ctd style=\"height: 39.1796px;\" height=\"27\" rowspan=\"2\"\u003e\n\u003cp\u003eTurbine Wheel\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"height: 19.5898px;\"\u003eIn:\u003c\/td\u003e\n\u003ctd style=\"height: 19.5898px;\"\u003e56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5898px;\"\u003e\n\u003ctd style=\"height: 19.5898px;\"\u003eEx:\u003c\/td\u003e\n\u003ctd style=\"height: 19.5898px;\"\u003e49.2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 26.9922px;\"\u003e\n\u003ctd style=\"height: 26.9922px;\" bgcolor=\"#CCCCCC\" height=\"27\" colspan=\"2\"\u003eActuator:\u003c\/td\u003e\n\u003ctd style=\"height: 26.9922px;\" bgcolor=\"#CCCCCC\" height=\"27\"\u003e1.1 Bar \/ 16 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 26.9922px;\"\u003e\n\u003ctd style=\"height: 26.9922px;\" height=\"27\" colspan=\"2\"\u003eTurbine Housing:\u003c\/td\u003e\n\u003ctd style=\"height: 26.9922px;\" height=\"27\"\u003e7 cm2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 26.9922px;\"\u003e\n\u003ctd style=\"height: 26.9922px;\" bgcolor=\"#CCCCCC\" height=\"27\" colspan=\"2\"\u003eMax. Power:\u003c\/td\u003e\n\u003ctd style=\"height: 26.9922px;\" bgcolor=\"#CCCCCC\" height=\"27\"\u003e400 HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eKit Contents\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e• Turbocharger\u003cbr\u003e• Actuator\u003cbr\u003e• Oil Pipe\u003cbr\u003e• Water Pipe\u003cbr\u003e• Gaskets\u003cbr\u003e• Hardware kits\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApplication: \u003c\/strong\u003eSubaru GDA-GDB WRX\/STI 2002-2015, GC8 1998-2001, Forester SG5 2005-2007\u003c\/p\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":46718948933795,"sku":"TR-TS1000","price":1095.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/3398\/7235\/files\/dsc_137911.jpg?v=1767649795","url":"https:\/\/wiscomotors.com\/products\/tr-td05-18g-bolt-on-turbo-stock-replacement-for-subaru-wrx-2002-2007-and-sti-2002-2010-w-billet-actuator","provider":"Wisco Motors","version":"1.0","type":"link"}