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| techtalk:ref:engmech05j [2020/10/08 17:35] – [Doherty Style Breather] hippysmack | techtalk:ref:engmech05j [2023/12/22 01:50] (current) – hippysmack |
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| * A 45 ° hose barb fitting was installed to connect a length of hose that leads back along the frame. \\ This way the oil mist gets directed out back and doesn't collect along the frame and engine. | * A 45 ° hose barb fitting was installed to connect a length of hose that leads back along the frame. \\ This way the oil mist gets directed out back and doesn't collect along the frame and engine. |
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| |Stock 77-78 tube removed, fitted w/ 1/8" 45° barb fitting. An external valve can be plumbed inline now. ((photos by ericfreeman of the XLFORUM http://xlforum.net/forums/showthread.php?t=1928882)) || | |Stock 77-78 tube removed, fitted w/ 1/8" 45° barb fitting. An external valve can be plumbed inline now. ((photos by ericfreeman of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/179539-foo-foo-breather-fitting-alternatives?t=1928882)) || |
| |{{:techtalk:ih:engmech:foofoo_vent_mod_pic1_by_ericfreeman.jpg?direct&300|}}|{{:techtalk:ih:engmech:foofoo_vent_mod_pic2_by_ericfreeman.jpg?direct&300|}}| | |{{:techtalk:ih:engmech:foofoo_vent_mod_pic1_by_ericfreeman.jpg?direct&300|}}|{{:techtalk:ih:engmech:foofoo_vent_mod_pic2_by_ericfreeman.jpg?direct&300|}}| |
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| ====== List of Aftermarket Breather Valves ====== | ====== List of Aftermarket Breather Valves ====== |
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| **Finding a better breather valve**: ((bunny32 of the XLFORUM http://xlforum.net/forums/showthread.php?t=15705&page=2)) \\ | **Finding a better breather valve**: ((bunny32 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-motor-top-end/10013-blowby-article/page2?t=15705&page=2)) \\ |
| The breather valves that work best on crankcase breathers have several features: \\ | The breather valves that work best on crankcase breathers have several features: \\ |
| * Low-inertia, i.e. they don't take more than a breath to open and close. | * Low-inertia, i.e. they don't take more than a breath to open and close. |
| The ball and spring valves will not be able to work fast enough to keep all the air out. \\ | The ball and spring valves will not be able to work fast enough to keep all the air out. \\ |
| When air is allowed to be drawn back into the engine, it creates a mass that must be compressed by the pistons on downstroke as it is being vented out. \\ | When air is allowed to be drawn back into the engine, it creates a mass that must be compressed by the pistons on downstroke as it is being vented out. \\ |
| This robs some power and will cause the engine to work harder (creating more internal heat at higher RPM). ((Deimus of the XLFORUM http://xlforum.net/forums/showthread.php?t=67658&page=18)) \\ | This robs some power and will cause the engine to work harder (creating more internal heat at higher RPM). ((Deimus of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/35356-install-new-crankcase-vent-04/page18?t=67658&page=18)) \\ |
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| Aftermarket PCV's: ((electronbee of the XLFORUM http://xlforum.net/forums/showthread.php?t=72099&highlight=reed+valve&page=10)) \\ | Aftermarket PCV's: ((electronbee of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/36799-installing-the-ultimate-crankcase-vent-%C2%93how-to%C2%94/page10?t=72099&highlight=reed+valve&page=10)) \\ |
| * Mercedes Benz P/N# 271-018-00-29 ~$13. | * Mercedes Benz P/N# 271-018-00-29 ~$13. |
| * Reed type PCV valve. Fast acting. Used for their C 230 Kompressor engine. | * Reed type PCV valve. Fast acting. Used for their C 230 Kompressor engine. |
| * Makes a clicking noise during operation. | * Makes a clicking noise during operation. |
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| | Here is a 2-stroke reed valve. ((photo by norseXL of the XLFORUM http://xlforum.net/forums/showthread.php?t=1386341&highlight=reed)) | | | Here is a 2-stroke reed valve. ((photo by norseXL of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/frame-mount-evo-sportster-talk-1986-2003-models/131026-my-mods-to-venting-and-oiling?t=1386341&highlight=reed)) | |
| |{{:techtalk:ref:engmech:reed_valve_by_norsexl.jpg?direct&300|}}| | |{{:techtalk:ref:engmech:reed_valve_by_norsexl.jpg?direct&300|}}| |
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| | Mercedes Benz P/N# 271-018-00-29 ((photo by electronbee of the XLFORUM http://xlforum.net/forums/showthread.php?t=72099&highlight=reed+valve&page=10)) | Reed Valve ((photo by Bluto of the XLFORUM http://xlforum.net/forums/showthread.php?p=5761290#post5761290)) | Doherty Power Vent ((Photo by goblin_dust of the XLFORUM http://xlforum.net/forums/showthread.php?t=72099&highlight=wet+sumping&page=23)) | | | Mercedes Benz P/N# 271-018-00-29 ((photo by electronbee of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/36799-installing-the-ultimate-crankcase-vent-%C2%93how-to%C2%94/page10?t=72099&highlight=reed+valve&page=10)) | Reed Valve ((photo by Bluto of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page2#post4317506)) | Doherty Power Vent ((Photo by goblin_dust of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/36799-installing-the-ultimate-crankcase-vent-%C2%93how-to%C2%94/page23?t=72099&highlight=wet+sumping&page=23)) | |
| |{{:techtalk:ref:engmech:mercedes_benz_pcv_valve_by_electronbee.jpg?direct&300|}}|{{:techtalk:ref:engmech:reed_valve_by_bluto.jpg?direct&300|}}|{{:techtalk:ref:engmech:deimus_mod_2_by_goblin_dust.jpg?direct&300|}}| | |{{:techtalk:ref:engmech:mercedes_benz_pcv_valve_by_electronbee.jpg?direct&300|}}|{{:techtalk:ref:engmech:reed_valve_by_bluto.jpg?direct&300|}}|{{:techtalk:ref:engmech:deimus_mod_2_by_goblin_dust.jpg?direct&300|}}| |
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| * Sifton Crankcase Breather ((https://www.ebay.com/itm/SIFTON-CASE-BREATHER-VENT-PCV-VALVE-HARLEY-EVO-SHOVELHEAD-PANHEAD-TWINCAM-KRANK/253213372444?epid=1665559744&hash=item3af4b1701c:g:F4cAAOSwzrxUuDhJ)) \\ This appears to be a cheaper version of the Hayden Crankvent also with an umbrella valve installed inside. \\ It is, however, a one time use part as it cannot be taken apart to replace the umbrella valve. | * Sifton Crankcase Breather ((https://www.ebay.com/itm/SIFTON-CASE-BREATHER-VENT-PCV-VALVE-HARLEY-EVO-SHOVELHEAD-PANHEAD-TWINCAM-KRANK/253213372444?epid=1665559744&hash=item3af4b1701c:g:F4cAAOSwzrxUuDhJ)) \\ This appears to be a cheaper version of the Hayden Crankvent also with an umbrella valve installed inside. \\ It is, however, a one time use part as it cannot be taken apart to replace the umbrella valve. |
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| Aftermarket PCV's: ((electronbee of the XLFORUM http://xlforum.net/forums/showthread.php?t=72099&highlight=reed+valve&page=10)) \\ | Aftermarket PCV's: ((electronbee of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/36799-installing-the-ultimate-crankcase-vent-%C2%93how-to%C2%94/page10?t=72099&highlight=reed+valve&page=10)) \\ |
| * Mercedes Benz P/N# 271-018-00-29 ~$13. | * Mercedes Benz P/N# 271-018-00-29 ~$13. |
| * Reed type PCV valve. Fast acting. Used for their C 230 Kompressor engine. | * Reed type PCV valve. Fast acting. Used for their C 230 Kompressor engine. |
| It uses (1) 91-03 umbrella valve in a custom sealed 2-piece compartment. The umbrella is replaceable by unscrewing the 2 body halves. \\ | It uses (1) 91-03 umbrella valve in a custom sealed 2-piece compartment. The umbrella is replaceable by unscrewing the 2 body halves. \\ |
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| |Hayden KVP38 breather valve, used with the \\ [[techtalk:ref:engmech05d|Deimus Mod]] (cam chest breather conversion). ((photo by 60Gunner of the XLFORUM http://xlforum.net/forums/showthread.php?p=5763918#post5763918))| Hayden Krankvent installed \\ (Deimus mod also) ((Photo by goblin_dust of the XLFORUM http://xlforum.net/forums/showthread.php?t=72099&highlight=wet+sumping&page=23)) | | |Hayden KVP38 breather valve, used with the \\ [[techtalk:ref:engmech05d|Deimus Mod]] (cam chest breather conversion). ((photo by 60Gunner of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-general-discussion-and-problems/197471-crankcase-breather-mod#post5763918))| Hayden Krankvent installed \\ (Deimus mod also) ((Photo by goblin_dust of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/36799-installing-the-ultimate-crankcase-vent-%C2%93how-to%C2%94/page23?t=72099&highlight=wet+sumping&page=23)) | |
| |{{:techtalk:ref:engmech:deimus_mod_8_by_60gunner.jpg?direct&300|}}|{{:techtalk:ref:engmech:deimus_mod_2_by_goblin_dust.jpg?direct&300|}}| | |{{:techtalk:ref:engmech:deimus_mod_8_by_60gunner.jpg?direct&300|}}|{{:techtalk:ref:engmech:deimus_mod_2_by_goblin_dust.jpg?direct&300|}}| |
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| | Hayden breather opened up. ((photos by leucadiaGuit of the XLFORUM http://xlforum.net/forums/showthread.php?t=2004869 cropped by Hippysmack)) || | | Hayden breather opened up. ((photos by leucadiaGuit of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/187973-oil-gremlin-help?t=2004869 cropped by Hippysmack)) || |
| |{{:techtalk:ref:engmech:hayden_krankvent_3_by_leucadiaguit_-_cropped.jpg?direct&300|}}|{{:techtalk:ref:engmech:hayden_krankvent_2_by_leucadiaguit_-_cropped.jpg?direct&300|}}| | |{{:techtalk:ref:engmech:hayden_krankvent_3_by_leucadiaguit_-_cropped.jpg?direct&300|}}|{{:techtalk:ref:engmech:hayden_krankvent_2_by_leucadiaguit_-_cropped.jpg?direct&300|}}| |
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| Made in the USA by Doherty Machine. \\ | Made in the USA by Doherty Machine. \\ |
| Available for head or crankcase breathing engines, with kits for both Evo & Twin Cam engines. \\ | Available for head or crankcase breathing engines, with kits for both Evo & Twin Cam engines. \\ |
| Doherty Power Vents are no longer being made by Doherty Machine. \\ | **Doherty Power Vents are no longer being made by Doherty Machine**. ((http://www.cas4.com/engine/engine-crankcase-breathers-breather-valves2.html)) \\ |
| However, there is another company making this product (see Doherty Style Breather below) \\ | However, there is another company making this product (see Doherty Style Breather below) \\ |
| | * CNC-machined T-6 billet aluminum |
| | * Show-quality polished finish |
| | * One-way valve prevents backflow |
| | * Kits include machined bolts and plastic washers for a tight seal |
| | * Work with most CV carb and EFI applications |
| | * Accepts 1/8” NPT fitting |
| | * Sold in pairs |
| | * Made in the U.S.A. |
| | * Fitment |
| | * DS21101123, 93-99 80” Evolution |
| | * DS21101122, 99-08 Twin Cam |
| | * DS21101124, 91-08 XL |
| | * DS289600, 70-92 80” Big Twin |
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| |Doherty Power Vents with the line routed up then \\ down and attached to the bottom of the frame. ((photo by RIORoosen of the XLFORUM http://xlforum.net/forums/showthread.php?t=146084&page=18))| | |
| | |Doherty Power Vents with the line routed up then \\ down and attached to the bottom of the frame. ((photo by RIORoosen of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-intake-and-exhaust/sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/44522-show-me-your-non-stock-breather-systems/page18?t=146084&page=18))| |
| |{{:techtalk:ref:engmech:breather_mod_by_rioroosen.jpg?direct&300|}}| | |{{:techtalk:ref:engmech:breather_mod_by_rioroosen.jpg?direct&300|}}| |
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| * Also comes in other styles. | * Also comes in other styles. |
| * Will not fit 98-01 magnetti mareli fuel injection and '08 and later FLH models. | * Will not fit 98-01 magnetti mareli fuel injection and '08 and later FLH models. |
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| ====== Reed Valve by Heiden Tuning ====== | ====== Reed Valve by Heiden Tuning ====== |
