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techtalk:ih:engmech07 [2019/12/04 00:33] hippysmack [76< Timed Breather Valve] |
techtalk:ih:engmech07 [2019/12/04 00:51] hippysmack [76< Timed Breather Valve] |
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| Documents from HD Racing from the period show no HP gain between the 2 systems when the breather is properly timed ( which didn't happen a lot). \\ | Documents from HD Racing from the period show no HP gain between the 2 systems when the breather is properly timed ( which didn't happen a lot). \\ | ||
| ===== 76< Timed Breather Valve ===== | ===== 76< Timed Breather Valve ===== | ||
| + | ==== Sub Documents ==== | ||
| + | * [[techtalk:ih:engmech07a|Timing the Breather Valve]] | ||
| + | |||
| The rotary breather valve is timed to open on the downstroke of the pistons. ((1960 HD FSM pg 3a-15)) \\ | The rotary breather valve is timed to open on the downstroke of the pistons. ((1960 HD FSM pg 3a-15)) \\ | ||
| This allows crankcase exhaust air pressure to expel the scavenge oil from the crankcase breather oil trap into the gearcase. \\ | This allows crankcase exhaust air pressure to expel the scavenge oil from the crankcase breather oil trap into the gearcase. \\ | ||
