{"product_id":"5150-b46-combustion-chamber-upgrade","title":"B46 Combustion Chamber Upgrade Service","description":"\u003cp data-start=\"153\" data-end=\"362\" class=\"\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003e\u003cem data-start=\"229\" data-end=\"362\"\u003ePlease note that pricing is based on the customer providing a core. If you need assistance sourcing a core, contact our sales team.\u003c\/em\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"364\" data-end=\"773\" class=\"\"\u003eFor enthusiasts and builders pushing the limits of BMW’s B46 engine, optimizing the combustion chamber is a critical step toward maximizing performance and reliability. The 5150 Combustion Chamber Upgrade Service reshapes the combustion chambers using state-of-the-art 5-axis CNC equipment for improved flow, consistency, and combustion efficiency—delivering proven gains in power, torque, and responsiveness.\u003c\/p\u003e\n\u003cp data-start=\"775\" data-end=\"1102\" class=\"\"\u003eAll machining is performed on our Rottler 5-Axis CNC platform to ensure precise, repeatable results across all cylinders. This service is ideal for customers integrating performance upgrades such as forged pistons, aftermarket turbos, or high-lift camshafts, ensuring the combustion chamber no longer remains a limiting factor.\u003c\/p\u003e\n\u003ch3 data-start=\"1109\" data-end=\"1171\" class=\"\"\u003e\u003cstrong data-start=\"1113\" data-end=\"1171\"\u003eCNC Combustion Chamber Reshaping Process for B46 Heads\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1173\" data-end=\"1386\" class=\"\"\u003e\u003cstrong data-start=\"1173\" data-end=\"1212\"\u003e1. 3D Scanning and Digital Modeling\u003c\/strong\u003e\u003cbr data-start=\"1212\" data-end=\"1215\"\u003eEach combustion chamber is digitally scanned and converted into a 3D model. This detailed map reveals flow inefficiencies, shrouded areas, and opportunities for reshaping.\u003c\/p\u003e\n\u003cp data-start=\"1388\" data-end=\"1623\" class=\"\"\u003e\u003cstrong data-start=\"1388\" data-end=\"1415\"\u003e2. Chamber Optimization\u003c\/strong\u003e\u003cbr data-start=\"1415\" data-end=\"1418\"\u003eOur engineering team refines the combustion chamber geometry to improve airflow and fuel atomization while reducing hot spots and detonation risk—critical for both high-boost and high-revving applications.\u003c\/p\u003e\n\u003cp data-start=\"1625\" data-end=\"1872\" class=\"\"\u003e\u003cstrong data-start=\"1625\" data-end=\"1652\"\u003e3. 5-Axis CNC Machining\u003c\/strong\u003e\u003cbr data-start=\"1652\" data-end=\"1655\"\u003eThe redesigned chamber shape is cut using our Rottler EM69HP CNC system, ensuring that every chamber is identical in volume, shape, and surface finish. Precision surface smoothing enhances both airflow and combustion.\u003c\/p\u003e\n\u003cp data-start=\"1874\" data-end=\"2089\" class=\"\"\u003e\u003cstrong data-start=\"1874\" data-end=\"1897\"\u003e4. Final Inspection\u003c\/strong\u003e\u003cbr data-start=\"1897\" data-end=\"1900\"\u003eEach head undergoes a rigorous dimensional check and, if requested, flow-bench testing. We verify uniformity and tolerances to ensure consistent, reliable results across all four cylinders.\u003c\/p\u003e\n\u003ch3 data-start=\"2096\" data-end=\"2145\" class=\"\"\u003e\u003cstrong data-start=\"2100\" data-end=\"2145\"\u003ePerformance Benefits for the B46 Platform\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"2149\" data-end=\"2385\"\u003e\n\u003cstrong data-start=\"2149\" data-end=\"2175\"\u003ePower and Torque Gains\u003c\/strong\u003e\u003cbr data-start=\"2175\" data-end=\"2178\"\u003eRedesigned chambers improve cylinder filling and combustion pressure, delivering measurable increases in horsepower and torque—especially when paired with supporting mods like big turbos or upgraded fueling.\u003c\/li\u003e\n\u003cli data-start=\"2389\" data-end=\"2597\"\u003e\n\u003cstrong data-start=\"2389\" data-end=\"2433\"\u003eImproved Combustion and Knock Resistance\u003c\/strong\u003e\u003cbr data-start=\"2433\" data-end=\"2436\"\u003eRefined shaping helps promote even flame travel, reduces detonation risk under boost, and supports more aggressive ignition timing and higher compression ratios.\u003c\/li\u003e\n\u003cli data-start=\"2601\" data-end=\"2777\"\u003e\n\u003cstrong data-start=\"2601\" data-end=\"2642\"\u003eBalanced Performance Across Cylinders\u003c\/strong\u003e\u003cbr data-start=\"2642\" data-end=\"2645\"\u003eCNC repeatability ensures that no cylinder runs hotter or leaner than the rest—an essential factor for high-stress, high-RPM builds.\u003c\/li\u003e\n\u003cli data-start=\"2781\" data-end=\"3051\"\u003e\n\u003cstrong data-start=\"2781\" data-end=\"2823\"\u003eCompliments Other Performance Upgrades\u003c\/strong\u003e\u003cbr data-start=\"2823\" data-end=\"2826\"\u003eThis upgrade enhances the effectiveness of aftermarket camshafts, valves, porting, forced induction, and exhaust systems by allowing the combustion chamber to flow and burn as efficiently as the rest of the engine components.\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eSupplied in Egypt by iCode — the official 5150 AutoSport dealer.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cem\u003ePrice shown in EGP is an estimate at today's exchange rate. Final price confirmed after shipping and customs fees.\u003c\/em\u003e\u003c\/p\u003e","brand":"5150 AutoSport","offers":[{"title":"Default Title","offer_id":68329811411143,"sku":"5150-CCM-B46","price":21612.0,"currency_code":"EGP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0778\/2108\/3847\/files\/BMW-Toyota-B58-Ported-Cylinder-Head-Service_c740fbc4-003a-4ab5-9d3f-b77cee79173a.webp?v=1794334119","url":"https:\/\/icode-egypt.com\/products\/5150-b46-combustion-chamber-upgrade","provider":"iCode - EG","version":"1.0","type":"link"}