{"title":"F9X X3M\/X4M Engines \u0026 Engine Components","description":"","products":[{"product_id":"valve-spring-kit-high-performance-valve-springs-bmw-s55-s58-b58-carbahn","title":"High Performance Valve Spring Kit | BMW S55\/S58\/B58","description":"\u003cdiv\u003e\n\u003cp\u003eSteve Dinan has been building racing and high performance road car engines for over 40 years. We are concerned about the trend in high performance valve springs on the new S55, S58 and B58 engines. Companies are selling springs with very high spring rates that will rob power and dramatically increase valve train wear.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eTheory\u003c\/h5\u003e\n\u003cp\u003eThe goal of a valve spring pressure is to make it as low as possible. This is because compressing a spring takes energy and robs potential power. In addition, more valve spring pressure increases valve train wear. We work very hard at running just enough valve spring pressure to keep the follower in contact with the camshaft but no more. If you increase the RPM you increase the valve spring just enough to manage the inertia from the increased RPM. The valve spring also needs enough seat pressure and the correct frequency not to bounce when the valve is closed. This is to avoid leaking trapped mass (the fuel air charge).\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eBoosted Engine\u003c\/h5\u003e\n\u003cp\u003eWith a boosted engine you will need a slight increase in pressure to push back against the boost pressure in the intake trying to hold the valve open. This amount of pressure added is much less than the pressure to control the inertia of the valve train.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eConclusion\u003c\/h5\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp\u003eIf you double the boost pressure you do not need to double the spring pressure since only about 20% of the spring pressure is to control the boost pressure and 80% is to control the valve train mass. An additional 20% of valve spring pressure is all you need to run.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty \u0026amp; Additional Information\u003c\/strong\u003e\u003cbr\u003eOur engines are very strong and can often be very reliable even at power levels above what is recommended. The durability usually depends on the quality and the reliability of the tune and other aftermarket components added to the engine management system.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003e\u003cstrong\u003eEngines with CarBahn Software Tunes\u003c\/strong\u003e\u003c\/em\u003e\u003cbr\u003eAll engines listed with a stage number are designed to be road car engines and are covered for 2 years, 24,000 miles providing they have a CarBahn tune and there are no other parts on the car that have caused a premature failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003e\u003cstrong\u003eEngines with Another Company's Tune\u003c\/strong\u003e\u003c\/em\u003e\u003cbr\u003eAll engines listed with a stage number are designed to be road car engines and are covered are covered for 1 year, 12,000 miles providing they you stay under our recommended torque limits. Torque limits are indicated on our web site. Warranty does not cover failures from the tune or aftermarket fuel injection components that caused the failure. It is CarBahn full discretion to determine cause of failure. \u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003e\u003cstrong\u003eRacing Engines\u003c\/strong\u003e\u003c\/em\u003e\u003cbr\u003eRacing engines are designed to be raced and are covered for materials and workmanship only. Racing engines should be rebuilt periodically based on run time or mileage. Warranty does not cover failures from the tune or aftermarket fuel injection components that caused the failure. It is CarBahn full discretion to determine cause of failure. \u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-is-last-node=\"\" data-end=\"939\" data-start=\"793\"\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/l1l5J-j82eQ?si=2z3i0xhRVznZ_L0w\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!----\u003e","brand":"CarBahn","offers":[{"title":"Default Title","offer_id":49246850777405,"sku":"DC526-2498","price":595.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0883\/1896\/8125\/files\/S55Full1-1-2_faae4e71-d464-45fe-973f-37fb2947360f.jpg?v=1723838930"},{"product_id":"bmw-s58-b30a-stage-2-high-performance-engine-for-f9x-x3m-x4m-x3m-x4m-competition","title":"Stage 2 S58 High Performance Engine | BMW F9X X3M\/X4M","description":"\u003cp data-start=\"0\" data-end=\"682\"\u003eThe CarBahn B30A S58 Stage 2 engine is rated for up to 850 lb-ft of torque. It is designed to improve durability for high-output tunes, making it a great alternative to an OEM factory remanufactured engine, especially if your original engine has failed and is no longer under warranty. Please note, the engine itself is not covered under warranty. We utilize high-quality racing components, including Carrillo connecting rods, forged CP pistons, high-performance valve springs, a high-performance head gasket, and cylinder head studs. The CarBahn S58 engine is both stronger and more affordable than the BMW OEM factory engine, making it the ideal choice for BMW S58 performance enthusiasts.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"TextRun SCXW5873555 BCX0\" lang=\"EN-US\" data-contrast=\"none\"\u003e\u003cspan class=\"NormalTextRun SCXW5873555 BCX0\"\u003eThe stock engine compression ratio is\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"NormalTextRun SCXW5873555 BCX0\"\u003erelatively high\u003c\/span\u003e\u003cspan class=\"NormalTextRun SCXW5873555 BCX0\"\u003e\u003cspan\u003e \u003c\/span\u003edue to the Corporate Average Fuel Economy (CAFE) standards which push for consistently higher fuel economy in cars and trucks. However, this increased compression limits engine performance with higher boost settings by decreasing the size of the fuel-air charge in the combustion chamber, forcing the ignition timing to retard far below MBT (mean best timing, the theoretical\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"NormalTextRun SCXW5873555 BCX0\"\u003eoptimal\u003c\/span\u003e\u003cspan class=\"NormalTextRun SCXW5873555 BCX0\"\u003e\u003cspan\u003e \u003c\/span\u003eignition timing). Therefore, the\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"NormalTextRun SpellingErrorV2Themed SCXW5873555 BCX0\"\u003eCarbahn\u003c\/span\u003e\u003cspan class=\"NormalTextRun SCXW5873555 BCX0\"\u003e\u003cspan\u003e \u003c\/span\u003eS58 engine has 0.5 less compression to\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"NormalTextRun SCXW5873555 BCX0\"\u003eoptimize\u003c\/span\u003e\u003cspan class=\"NormalTextRun SCXW5873555 BCX0\"\u003e\u003cspan\u003e \u003c\/span\u003ethe engine for the increased boost.\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"EOP SCXW5873555 BCX0\" data-ccp-props='{\"201341983\":0,\"335557856\":16777215,\"335559739\":300,\"335559740\":240}'\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe CarBahn engine is both stronger and less expensive than the BMW OEM factory engine. The S58 CarBahn engine is designed to improve the strength of your engine if you are tuning your car. Connecting rods are replaced with Carrillo forged racing rods. Pistons are CP forged racing pistons. The engine also comes with ported cylinder head and high-performance valve springs for ultra-high boost pressures. The engine is a complete overhaul with blue printing and balancing. This engine is designed for an increase in torque of 100% over stock.\u003c\/p\u003e","brand":"CarBahn","offers":[{"title":"Default Title","offer_id":49265547706685,"sku":"CBB06-06-3012","price":18995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0883\/1896\/8125\/files\/B58_S58_Stage_2_CarBahn_Engine.jpg?v=1725468525"},{"product_id":"stage-1-s58-high-performance-engine-b30a-bmw-x3m-x4m","title":"Stage 1 S58 High Performance Engine | BMW F9X X3M\/X4M","description":"\u003cp data-end=\"549\" data-start=\"0\"\u003eThe CarBahn ST1 B30A S58 engine is rated for up to 650 lb-ft of torque. It is designed to improve durability for medium-output tunes, making it an excellent alternative to an OEM factory remanufactured engine, especially if your original engine has failed and is no longer under warranty. We utilize high-quality racing components, including Carrillo connecting rods, forged CP pistons, high-performance valve springs, and a high-performance head gasket. This engine maintains the stock compression ratio, ensuring excellent drivability and fuel economy.\u003c\/p\u003e","brand":"CarBahn","offers":[{"title":"Default Title","offer_id":49291484365117,"sku":"CBB06-06-3011","price":17995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0883\/1896\/8125\/files\/Stage1B58S58CarBahnEngine_e2c0e9ea-04e5-468e-a584-42b4d557ce67.jpg?v=1763399053"},{"product_id":"stage-4-3-0l-s58-high-performance-engine-b30a-xdrive-bmw-m3-m4-copy","title":"3.0L S58 High Performance Racing Engine (B30A) | BMW F9X X3M\/X4M","description":"\u003cdiv class=\"cbn-engine-copy\"\u003e\n\u003cp\u003eThe CarBahn S58 Racing engine is rated for up to 1,000 lb-ft of torque and is designed for ultra-high output tunes. We use premium racing components like Carrillo connecting rods, forged CP pistons, high-performance valve springs, ultra-high-performance head gaskets, cylinder head studs, and racing camshafts. The engine lowers compression by 0.5 to enable more power with higher boost settings without detonation issues.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"CarBahn","offers":[{"title":"Default Title","offer_id":49860444684605,"sku":"CBB06-06-3022","price":21995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0883\/1896\/8125\/files\/s58-b58-stage-3.jpg?v=1762220866"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0883\/1896\/8125\/collections\/s58-b58-stage-3.png?v=1763354991","url":"https:\/\/carbahn.com\/collections\/f9x-x3m-x4m-engines-engine-components.oembed","provider":"CarBahn","version":"1.0","type":"link"}