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techtalk:ref:engmech01h [2018/09/19 03:18] hippysmack [Test Fitting Cams] |
techtalk:ref:engmech01h [2019/08/16 12:57] hippysmack [Clearancing] |
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| [[:techtalk:menu|{{ :techtalk:gototechnicalmenu.jpg|}}]] | [[:techtalk:menu|{{ :techtalk:gototechnicalmenu.jpg|}}]] | ||
| ====== REF: Engine Mechanicals - Sub-01H ====== | ====== REF: Engine Mechanicals - Sub-01H ====== | ||
| - | ====== Test Fitting Cams ====== | + | ====== Clearancing for and Test Fitting Cams ====== |
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| + | ====== Clearancing ====== | ||
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| + | |The underside of the lifter bosses often need a little \\ grinding to keep the cam lobes from contacting. ((photo by aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?p=668404#post668404))|Big cam lobes also may try to hit the pinion race, \\ which protrudes from the case slightly. It sticks out \\ farther on 2000-up motors. ((photo by aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?p=668404#post668404))|If the lobe is contacting the pinion race, it's better to \\ modify the lobe than the race (this is a Red Shift 567). \\ Notice the chamfer on the lobe below. Modifying that \\ race is difficult and risky. People have done it and \\ trashed the bearing in the process. ((photo by aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?p=668404#post668404))| | ||
| + | |{{:techtalk:ref:engmech:clearancing_the_engine_for_bigger_cams_1_by_aswracing.jpg?direct&300|}}|{{:techtalk:ref:engmech:clearancing_the_engine_for_bigger_cams_2_by_aswracing.jpg?direct&300|}}|{{:techtalk:ref:engmech:clearancing_the_engine_for_bigger_cams_3_by_aswracing.jpg?direct&300|}}| | ||
| + | ====== Test Fitting ====== | ||
| Factory fitting of the cams is (or rather was) all about noise control. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1840595)) \\ | Factory fitting of the cams is (or rather was) all about noise control. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1840595)) \\ | ||
| By selecting the cam gears sized specifically for the engine they were going in, they could walk that fine line between noisy and too-tight. \\ | By selecting the cam gears sized specifically for the engine they were going in, they could walk that fine line between noisy and too-tight. \\ | ||
