{"product_id":"tomei-valve-spring-sr20det","title":"Tomei VALVE SPRING SR20DE(T) - A TYPE 163073","description":"\u003cp class=\"description\"\u003eHigh quality designed springs is required to transfer the exact movement of the camshaft to the valves at high engine speeds on high performance engines. The TOMEI products are always engineered with precision in mind to suit the user’s needs. So with this in mind careful choices in material selection is made with surface coating and other technologies. Then the pre-production products are put through an extensive testing program for checking durability, quality and performance. We spend time and money to help you save your valuable time and money.\u003c\/p\u003e\n\u003ch2\u003ePRODUCT INFO\u003c\/h2\u003e\n\u003cdiv class=\"table-box\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAPPLICATION\u003c\/th\u003e\n\u003cth\u003eTYPE\u003c\/th\u003e\n\u003cth\u003eCOMPATIBLE LIFT(mm)\u003c\/th\u003e\n\u003cth\u003eP\/N\u003c\/th\u003e\n\u003cth\u003eJPY\u003c\/th\u003e\n\u003cth\u003eNOTES\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"3\"\u003eSR20DE(T)\u003c\/td\u003e\n\u003ctd\u003eA\u003c\/td\u003e\n\u003ctd\u003e～12.50\u003c\/td\u003e\n\u003ctd\u003e163073\u003c\/td\u003e\n\u003ctd\u003e￥28,000\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eB\u003c\/td\u003e\n\u003ctd\u003e～12.50\u003c\/td\u003e\n\u003ctd\u003e163055\u003c\/td\u003e\n\u003ctd\u003eOrders are being suspended.\u003c\/td\u003e\n\u003ctd\u003eDouble springs and special titanium retainers　 With spring seats\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRNN14\u003c\/td\u003e\n\u003ctd\u003e～12.50\u003c\/td\u003e\n\u003ctd\u003e13203R301\u003c\/td\u003e\n\u003ctd\u003eDiscontinued\u003c\/td\u003e\n\u003ctd\u003eDouble Spring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003eFEATURE \/ SPEC\u003c\/h2\u003e\n\u003cdiv class=\"table-box\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth colspan=\"2\"\u003e \u003c\/th\u003e\n\u003cth\u003e\u003cspan class=\"en\"\u003eDIA METER\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan class=\"en\"\u003eFREE LENGTH(mm)\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan class=\"en\"\u003eSET LENGTH(mm)\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan class=\"en\"\u003eLIFT LENGTH(mm)\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan class=\"en\"\u003eCOMPRESSED LENGTH(mm)\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan class=\"en\"\u003eSET LOAD(kgf)\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan class=\"en\"\u003eLIFT LOAD(kgf)\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan class=\"en\"\u003eMATERIAL\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan class=\"en\"\u003ePROCESS\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan class=\"en\"\u003eCOLOR ID\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"2\"\u003eA TYPE\u003c\/th\u003e\n\u003ctd\u003eΦ4.00\u003c\/td\u003e\n\u003ctd\u003e47.7\u003c\/td\u003e\n\u003ctd\u003e40.0\u003c\/td\u003e\n\u003ctd\u003e27.5\u003c\/td\u003e\n\u003ctd\u003e25.3\u003c\/td\u003e\n\u003ctd\u003e23.5±7%\u003c\/td\u003e\n\u003ctd\u003e81.6±7%\u003c\/td\u003e\n\u003ctd\u003eSWOCN-V\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"en\"\u003eNitride\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"en\"\u003eOrange\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth rowspan=\"3\"\u003eB TYPE\u003c\/th\u003e\n\u003cth\u003eINNER\u003c\/th\u003e\n\u003ctd\u003eΦ2.50\u003c\/td\u003e\n\u003ctd\u003e35.2\u003c\/td\u003e\n\u003ctd\u003e32.2\u003c\/td\u003e\n\u003ctd\u003e19.7\u003c\/td\u003e\n\u003ctd\u003e18.7\u003c\/td\u003e\n\u003ctd\u003e3.4±8%\u003c\/td\u003e\n\u003ctd\u003e23.4±8%\u003c\/td\u003e\n\u003ctd\u003eSWOSC-VX\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"en\"\u003eNitride\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"en\"\u003eRed\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOUTER\u003c\/th\u003e\n\u003ctd\u003eΦ4.00\u003c\/td\u003e\n\u003ctd\u003e48.0\u003c\/td\u003e\n\u003ctd\u003e40.0\u003c\/td\u003e\n\u003ctd\u003e27.5\u003c\/td\u003e\n\u003ctd\u003e26.5\u003c\/td\u003e\n\u003ctd\u003e25.6±7%\u003c\/td\u003e\n\u003ctd\u003e81.6±7%\u003c\/td\u003e\n\u003ctd\u003eSWOSC-VX\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"en\"\u003eNitride\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"en\"\u003eRed\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan class=\"en\"\u003eCOMBINED\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e29.0±8%\u003c\/td\u003e\n\u003ctd\u003e105.0±8%\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth rowspan=\"3\"\u003eRNN14\u003c\/th\u003e\n\u003cth\u003eINNER\u003c\/th\u003e\n\u003ctd\u003eΦ2.30\u003c\/td\u003e\n\u003ctd\u003e43.3\u003c\/td\u003e\n\u003ctd\u003e31.0\u003c\/td\u003e\n\u003ctd\u003e19.0\u003c\/td\u003e\n\u003ctd\u003e17.5\u003c\/td\u003e\n\u003ctd\u003e9.0\u003c\/td\u003e\n\u003ctd\u003e24.0\u003c\/td\u003e\n\u003ctd\u003eSWOSC-V\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"en\"\u003eNitride\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"en\"\u003eNil\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOUTER\u003c\/th\u003e\n\u003ctd\u003eΦ3.80\u003c\/td\u003e\n\u003ctd\u003e46.4\u003c\/td\u003e\n\u003ctd\u003e38.0\u003c\/td\u003e\n\u003ctd\u003e26.0\u003c\/td\u003e\n\u003ctd\u003e24.4\u003c\/td\u003e\n\u003ctd\u003e20.0\u003c\/td\u003e\n\u003ctd\u003e60.0\u003c\/td\u003e\n\u003ctd\u003eSWOSC-V\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"en\"\u003eNitride\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"en\"\u003eNil\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan class=\"en\"\u003eCOMBINED\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e29.0\u003c\/td\u003e\n\u003ctd\u003e84.0\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"description\"\u003e\u003cimg src=\"https:\/\/www.tomei-p.co.jp\/catalogue\/wp-content\/uploads\/2017\/09\/srvs.jpg\" alt=\"\" width=\"1100\" height=\"250\" class=\"aligncenter size-full wp-image-3268\" srcset=\"https:\/\/www.tomei-p.co.jp\/catalogue\/wp-content\/uploads\/2017\/09\/srvs.jpg 1100w, https:\/\/www.tomei-p.co.jp\/catalogue\/wp-content\/uploads\/2017\/09\/srvs-300x68.jpg 300w, https:\/\/www.tomei-p.co.jp\/catalogue\/wp-content\/uploads\/2017\/09\/srvs-768x175.jpg 768w, https:\/\/www.tomei-p.co.jp\/catalogue\/wp-content\/uploads\/2017\/09\/srvs-1024x233.jpg 1024w\" sizes=\"(max-width: 1100px) 100vw, 1100px\"\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp class=\"description\"\u003e\u003cspan class=\"en\"\u003e\u003cstrong\u003e■ Multi Coil Unequal Pitch Springs\u003c\/strong\u003e\u003cbr\u003eBy combining several steps of spring rates into the one spring and vibration frequency becomes amazingly high. This greatly minimizes resonance and the chances of surging.\u003cspan\u003e \u003c\/span\u003e\u003cimg src=\"https:\/\/www.tomei-p.co.jp\/catalogue\/wp-content\/uploads\/2017\/09\/vs_info1_e.jpg\" alt=\"\" width=\"1100\" height=\"234\" class=\"aligncenter size-full wp-image-3205\" srcset=\"https:\/\/www.tomei-p.co.jp\/catalogue\/wp-content\/uploads\/2017\/09\/vs_info1_e.jpg 1100w, https:\/\/www.tomei-p.co.jp\/catalogue\/wp-content\/uploads\/2017\/09\/vs_info1_e-300x64.jpg 300w, https:\/\/www.tomei-p.co.jp\/catalogue\/wp-content\/uploads\/2017\/09\/vs_info1_e-768x163.jpg 768w, https:\/\/www.tomei-p.co.jp\/catalogue\/wp-content\/uploads\/2017\/09\/vs_info1_e-1024x218.jpg 1024w\" sizes=\"(max-width: 1100px) 100vw, 1100px\"\u003e\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp class=\"description\"\u003e\u003cspan class=\"en\"\u003e\u003cstrong\u003e■ Oil Tempered Chromium-silicone Alloy Steel Core(SWOCN-V)\u003c\/strong\u003e\u003cbr\u003eOil tempered chromium-silicone alloy steel wire is used which is considered to be the best material for springs for performance applications and evolved it even further. Combined with a new optimized design, not only did we make it tougher, we also succeeded in suppressing valve jumps or bounce even when raising the engines speeds RPM limit.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp class=\"description\"\u003e\u003cspan class=\"en\"\u003e\u003cstrong\u003e■ Shot Peening\u003c\/strong\u003e\u003cbr\u003eA process that strikes many small steel balls onto the surface of the spring at high speeds is made to enhance the surface of the spring to raise its fatigue limit. Although it has been carried out earlier during the manufacturing process.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp class=\"description\"\u003e\u003cspan class=\"en\"\u003e\u003cstrong\u003e■ Warm Setting\u003c\/strong\u003e\u003cbr\u003eThe process that is adding higher loads beyond the actual limits to the highly heated spring. This will modify its shape and keep it permanently fixed. We succeeded in securing the highest performance over a long period of time while preventing sagging.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp class=\"description\"\u003e\u003cspan class=\"en\"\u003e\u003cstrong\u003e■ Nitriding\u003c\/strong\u003e\u003cbr\u003eThe surface treatment method for making nitrogen permeates the spring and gives it large surface compression repulsion. This method was chosen to raise the fatigue limit to suit the demands or running high lift camshafts. The dangers of spring failure is greatly reduced with the 1.5 times increase in the springs fatigue limit with the combined use of Oil tempered chromium-silicone alloy steel wire and Nitriding. This is how our valve springs are suitable for use on extreme engine speed conditions of super-high revs exceeding 10,000 RPM which had not been previously possible with high lift camshafts.\u003cspan\u003e \u003c\/span\u003e\u003cimg src=\"https:\/\/www.tomei-p.co.jp\/catalogue\/wp-content\/uploads\/2017\/09\/vs_info2_e.jpg\" alt=\"\" width=\"1100\" height=\"234\" class=\"aligncenter size-full wp-image-3213\" srcset=\"https:\/\/www.tomei-p.co.jp\/catalogue\/wp-content\/uploads\/2017\/09\/vs_info2_e.jpg 1100w, https:\/\/www.tomei-p.co.jp\/catalogue\/wp-content\/uploads\/2017\/09\/vs_info2_e-300x64.jpg 300w, https:\/\/www.tomei-p.co.jp\/catalogue\/wp-content\/uploads\/2017\/09\/vs_info2_e-768x163.jpg 768w, https:\/\/www.tomei-p.co.jp\/catalogue\/wp-content\/uploads\/2017\/09\/vs_info2_e-1024x218.jpg 1024w\" sizes=\"(max-width: 1100px) 100vw, 1100px\"\u003e\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv class=\"kaihei-header x\"\u003e\u003cspan class=\"en\"\u003eTerminology\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv class=\"kaihei-body\"\u003e\u003cspan class=\"en\"\u003e【Surging】\u003cbr\u003eThe Phenomenon which material of the valve spring resonance and causes the spring itself to vibrate violently.\u003cbr\u003e\u003cbr\u003e【Jump】\u003cbr\u003eThe Phenomenon that the valve rallies to the cam surface instead of settled back. It happens when the valve cannot follow the camshaft rotation and lifted irregally.\u003cbr\u003e\u003cbr\u003e【Bounce】\u003cbr\u003eThe Phenomenon that the valve is bouncing repeatedly from valve seat other than sticking to it when it is closing.\u003cbr\u003e\u003cbr\u003e【Fatigue】\u003cbr\u003eBreakage that occurs during the repeat operation of the spring. (The larger lift, the more possibilities to get fatigued)\u003cbr\u003e\u003cbr\u003e【Sag】\u003cbr\u003eThe Phenomenon in which the load (free play) of a spring decreases while inuse. It is related to the maximum stress under operation and use time.\u003c\/span\u003e\u003c\/div\u003e","brand":"TOMEI","offers":[{"title":"Default Title","offer_id":56327681540473,"sku":"163073","price":226.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/3531\/0639\/files\/163073.jpg?v=1765174338","url":"https:\/\/tomei.uk\/products\/tomei-valve-spring-sr20det","provider":"TOMEI UK","version":"1.0","type":"link"}