{"product_id":"hybrid-vf54-turbo-for-2010-subaru-legacy-gt","title":"Tomioka Racing TR Hybrid VF54 Turbo for 2010 Subaru Legacy GT","description":"\u003cp\u003e\u003cstrong\u003eTomioka Racing Hybrid VF54 Turbo\u003c\/strong\u003e is our newest line of turbo for the 2010 Subaru Legacy GT. This turbo is designed with performance in mind for the Subaru bottom mount turbo set -up. This turbo features a TD05-20G custom billet compressor wheel and upgraded steel wastegate actuator to maintain boost and increase power. IN addition, the hybrid turbo housings are machined to increase ow compared to the factory housing Legacy turbo. This hybrid VF54 will turn your BM\/BR Legacy GT in to a racing power house!\u003cbr\u003e\u003cbr\u003eCheck out the available video and dyno graph on this turbo.\u003c\/p\u003e\n\u003cp data-end=\"745\" data-start=\"507\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong data-end=\"534\" data-start=\"507\"\u003eRefundable Core Deposit\u003cbr\u003e\u003c\/strong\u003eA $500 refundable core deposit will be automatically added to your cart for this turbo. The deposit will be fully refunded once your original turbo core is returned. Core return shipping is included within the lower 48 U.S. states.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003e*** Note: This turbo does not come with turbo oil pan. Customer needs to transfer the original oil pan to the new turbo **** \u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cstrong\u003eTurbo Characteristics\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"500\" cellpadding=\"0\" cellspacing=\"0\" border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#CCCCCC\" colspan=\"2\"\u003eBearing Type:\u003c\/td\u003e\n\u003ctd bgcolor=\"#CCCCCC\"\u003eJournal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003eFlange Type:\u003c\/td\u003e\n\u003ctd\u003eStandard Legacy 2010\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#CCCCCC\" width=\"100\" rowspan=\"2\"\u003eCompressor Wheel\u003c\/td\u003e\n\u003ctd bgcolor=\"#CCCCCC\" width=\"36\"\u003eIn:\u003c\/td\u003e\n\u003ctd bgcolor=\"#CCCCCC\" width=\"364\"\u003e52.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#CCCCCC\"\u003eEx:\u003c\/td\u003e\n\u003ctd bgcolor=\"#CCCCCC\" width=\"364\"\u003e68 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd height=\"27\" rowspan=\"2\"\u003e\n\u003cp\u003eTurbine Wheel\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003eIn:\u003c\/td\u003e\n\u003ctd\u003e55.8 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEx:\u003c\/td\u003e\n\u003ctd\u003e49.2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#CCCCCC\" height=\"27\" colspan=\"2\"\u003eActuator:\u003c\/td\u003e\n\u003ctd bgcolor=\"#CCCCCC\" height=\"27\"\u003e1 Bar \/ 14 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd height=\"27\" colspan=\"2\"\u003eMax. Power:\u003c\/td\u003e\n\u003ctd height=\"27\"\u003e450 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 style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eKit Contents\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e• Turbocharger\u003cbr\u003e\u003cbr\u003e\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","offers":[{"title":"1.3 bar","offer_id":48881563402392,"sku":"0HNQU","price":1675.0,"currency_code":"USD","in_stock":false},{"title":"1.1 bar","offer_id":48881563435160,"sku":"0HNQU","price":1675.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0564\/0867\/0360\/files\/photo_2_web.jpg?v=1779525218","url":"https:\/\/frsport.com\/products\/hybrid-vf54-turbo-for-2010-subaru-legacy-gt","provider":"FR SPORT","version":"1.0","type":"link"}