{"product_id":"clevite-main-bearing-set-ms829v10","title":"Clevite Main Bearing Set MS829V10","description":"\u003cp\u003eVarious forms of main bearing grooving have been used over the years.\u003c\/p\u003e\u003cp\u003eIt is frequently asked what difference grooving makes.\u003c\/p\u003e\u003cp\u003eFirst, it is essential to understand that bearings depend on a film of oil to keep them separated from the shaft surface.\u003c\/p\u003e\u003cp\u003eThis oil film is developed by shaft rotation.\u003c\/p\u003e\u003cp\u003eAs the shaft rotates, it pulls oil into the loaded area of the bearing and rides up on this film much like a tire hydroplaning on wet pavement.\u003c\/p\u003e\u003cp\u003eGrooving in a bearing acts like tread in a tire to break up the oil film.\u003c\/p\u003e\u003cp\u003eWhile you want your tires to grip the road, you do not want your bearings to grip the shaft.\u003c\/p\u003e\u003cp\u003eThe primary reason for having any grooving in a main bearing is to provide oil to the connecting rods.\u003c\/p\u003e\u003cp\u003eWithout rod bearings to feed, a simple oil hole would be sufficient to lubricate a main bearing.\u003c\/p\u003e\u003cp\u003eMany early engines used full grooved bearings and some even used multiple grooves.\u003c\/p\u003e\u003cp\u003eAs engine and bearing technology developed, bearing grooving was removed from modern lower main bearings.\u003c\/p\u003e\u003cp\u003eThe result is a thicker film of oil for the shaft to ride on.\u003c\/p\u003e\u003cp\u003eThis provides a greater safety margin and improved bearing life.\u003c\/p\u003e\u003cp\u003eUpper main shells, which see lower loads than the lowers, have retained a groove to supply the connecting rods with oil.\u003c\/p\u003e\u003cp\u003eIn an effort to develop the best possible main bearing designs for performance engines, the effects of main bearing grooving on bearing performance have been investigated.\u003c\/p\u003e\u003cp\u003eThe graphs on the next page illustrate that a simple 180 groove in the upper main shell is still the best overall design.\u003c\/p\u003e\u003cp\u003eWhile a slightly shorter groove of 140 provides a marginal gain, most of the benefit is to the upper shell, which does not need improvement.\u003c\/p\u003e\u003cp\u003eOn the other hand, extending the groove into the lower half, even as little as 20 at each parting line (220 in total), takes away from upper bearing performance without providing any benefit to the lower half.\u003c\/p\u003e\u003cp\u003eIt is also interesting to note that as groove length increases, so do horsepower loss and Peak Oil Film Pressure which is transmitted directly.\u003c\/p\u003e","brand":"Clevite Engine Parts","offers":[{"title":"Default Title","offer_id":51721754083610,"sku":"CLEMS829V10","price":111.32,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0975\/8942\/8506\/files\/41pqwlNtNaL.jpg?v=1771611973","url":"https:\/\/trybeepbeep.com\/products\/clevite-main-bearing-set-ms829v10","provider":"TryBeepbeep","version":"1.0","type":"link"}