{"product_id":"mini-moke-flywheel-lightweight-steel-road-rally-inertia-starter","title":"MINI \u0026 MOKE FLYWHEEL LIGHTWEIGHT STEEL ROAD\/RALLY INERTIA STARTER [C-AEG421]","description":"\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eLightweight steel flywheel weighing approximately 4.48 kg (9.88 lbs)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, designed for classic Mini and Moke applications using a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003enon-Verto clutch and inertia-type starter motor\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe flywheel is supplied with the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e22G2613 ring gear\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e fitted.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eFor applications using a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003epre-engaged starter\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, see \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eC-AEG420\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eWHY LIGHTEN THE FLYWHEEL?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eReducing the weight of the flywheel reduces the rotational inertia of the engine, allowing the engine to \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003erev more quickly and improve acceleration\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe common saying that \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e\"1 lb off the flywheel is like taking 100 lbs off the car\"\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e isn't strictly accurate, but it illustrates the significant effect that reducing rotating mass can have on acceleration.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA standard cast-iron 1275 flywheel weighs approximately \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e22 lbs\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, while even the Cooper S flywheel is around \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e17 lbs\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. Because the standard flywheel is cast iron, there are limitations to how safely it can be lightened.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThis \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003esteel Road flywheel weighs approximately 9.88 lbs\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, providing a substantial reduction in rotating mass while retaining the strength and safety benefits of a purpose-designed steel flywheel.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eFor competition applications, the lighter \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eC-AEG619 full-race flywheel\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e weighs approximately \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e8 lbs\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eSPECIAL TUNING HERITAGE\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThis style of lightweight steel flywheel was originally produced by \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eSpecial Tuning\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and was even fitted to some Leyland Allegros to help eliminate clutch judder and reduce warranty claims.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eEFFECT OF LIGHTENING ROTATING COMPONENTS\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe effect of reducing flywheel weight is greater than simply removing the same amount of weight from the vehicle because the flywheel is a rotating component.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe calculation used to determine the equivalent accelerative weight is:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003e(0.5 × n² × r² + R²) \/ R²\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eWhere:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"isSelectedEnd\"\u003e\n\u003cstrong\u003e\u003cspan\u003en\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e = total gear ratio (gear ratio × differential ratio)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"isSelectedEnd\"\u003e\n\u003cstrong\u003e\u003cspan\u003er\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e = radius of gyration\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"isSelectedEnd\"\u003e\n\u003cstrong\u003e\u003cspan\u003eR\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e = radius of wheel\/tyre\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eFor a transverse A-Series engine, the approximate \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eradius of gyration of the flywheel is 3.75\"\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eAs an example, reducing a flywheel from \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e18 lbs to 10 lbs\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e removes 8 lbs of rotating mass.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eUsing a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e3.33:1 first gear\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e3.44:1 differential ratio\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, the calculation gives an equivalent accelerative weight reduction of approximately \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e11.22 lbs for every 1 lb removed from the flywheel\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eTherefore, removing \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e8 lbs from the flywheel\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e gives the engine an equivalent accelerative weight reduction of approximately \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e89.7 lbs\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e in first gear.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eAPPLICATION:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eLightweight steel construction\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eApprox. 4.48 kg (9.88 lbs)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eFor non-Verto clutch applications\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eFor inertia-type \/ non-pre-engaged starters\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003e22G2613 ring gear fitted\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eRoad \/ rally specification\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eImproves engine response and acceleration\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eA worthwhile upgrade for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eroad, fast-road and rally A-Series engines\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e where improved throttle response and acceleration are desired without using an ultra-light full-race flywheel.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"producttext\" style=\"font-size: 10pt;\"\u003eSo to determine \"weight loss\" for a flywheel weight of say 18 lb to 10 lb,\u003cbr\u003e\u003cbr\u003ethe engine would see an overall weight loss of the car to accelerate in first gear of:\u003cbr\u003e\u003cbr\u003e3.33 = 1st gear of 4 synchro 'S' box\u003cbr\u003e\u003cbr\u003e3.44 = diff ratio\u003cbr\u003e\u003cbr\u003e(0.5 x (3.33 x 3.34)2 x 3.752 + 9.52) \/ 9.52\u003cbr\u003e\u003cbr\u003e= (0.5 x 131.2 x 14.06 + 90.25) \/ 90.25\u003cbr\u003e\u003cbr\u003e= 1012.59 \/ 90.25 = 11.22 lbs\u003cbr\u003e\u003cbr\u003eSo for every 1 lb removed from the flywheel, the engine sees 11.22 lbs less\u003cbr\u003e\u003cbr\u003eto accelerate off of the total car.\u003cbr\u003e\u003cbr\u003eTherefore by lightening the flywheel by 8 lb,\u003cbr\u003e\u003cbr\u003ethe engine sees a total reduction of the cars accelerative weight of 89.68 lb.\u003c\/span\u003e\u003c\/p\u003e","brand":"Minisport.com.au","offers":[{"title":"Default Title","offer_id":44576718979382,"sku":"C-AEG421","price":449.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0727\/3322\/9366\/files\/Photoroom-20241028_130329_1.jpg?v=1730083312","url":"https:\/\/minisport.com.au\/products\/mini-moke-flywheel-lightweight-steel-road-rally-inertia-starter","provider":"Minisport","version":"1.0","type":"link"}