Differences

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--- techtalk:ref:engmech05j [2020/10/07 21:49]
hippysmack [Aftermarket Breather Valves]
+++ techtalk:ref:engmech05j [2023/12/22 01:50] (current)
hippysmack
@@ Line 1: / Line 1: @@
 [[:techtalk:menu|{{  :techtalk:gototechnicalmenu.jpg|}}]]
 ====== REF: Engine Mechanicals - Sub-05J ======
+====== Aftermarket Breather Valves ======
 \\
 ====== Plumbing an External Breather Valve ======
@@ Line 21: / Line 22: @@
     * 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.
-|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|}}|
+====== List of Aftermarket Breather Valves ======
-====== Aftermarket Breather Valves ======
+**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)) \\
-**Finding a better breather valve**: ((bunny32 of the XLFORUM http://xlforum.net/forums/showthread.php?t=15705&page=2)) \\
 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.
@@ Line 42: / Line 42: @@
 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. \\
-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)) \\
-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.
     * Reed type PCV valve. Fast acting. Used for their C 230 Kompressor engine.
@@ Line 54: / Line 54: @@
     * Makes a clicking noise during operation.
-|  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|}}|
-|  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|}}|
@@ Line 65: / Line 65: @@
   * 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.
-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.
     * Reed type PCV valve. Fast acting. Used for their C 230 Kompressor engine.
@@ Line 74: / Line 74: @@
   * Ball/spring based PCV valve.
     * Makes a clicking noise during operation.
 ====== Hayden Krankvent ======
-==== Sub Documents ====
+===== Sub Documents =====
   * [[techtalk:ref:engmech04a|Dissecting the Hayden KVP38 Crankcase Breather Valve]]
   * [[techtalk:ref:engmech04b|Frequently Asked Questions About the Hayden Krankvent]]
 The Hayden valve was built for Harley Davidson motorcycles in mind. Click on the "Dissecting the Hayden" link in the sub docs above to see more. \\
-It is a very good external valve alternative for 1977-present Sportsters. But, they are rather expensive. \\
+It is a very good external rubber umbrella valve alternative for 1977-present Sportsters. But, they are rather expensive. \\
 It uses (1) 91-03 umbrella valve in a custom sealed 2-piece compartment. The umbrella is replaceable by unscrewing the 2 body halves. \\
-|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 breather opened up. ((photos by leucadiaGuit of the XLFORUM http://xlforum.net/forums/showthread.php?t=2004869 cropped by Hippysmack))  ||
+|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:hayden_krankvent_3_by_leucadiaguit_-_cropped.jpg?direct&300|}}|{{:techtalk:ref:engmech:hayden_krankvent_2_by_leucadiaguit_-_cropped.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|}}|
+|  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|}}|
@@ Line 104: / Line 103: @@
 It was unbranded and with no directional arrow for installation so you'll have to blow into it first before installing to make sure how to plumb it. \\
+====== Doherty Power Vent ======
+Made in the USA by Doherty Machine. \\
+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**. ((http://www.cas4.com/engine/engine-crankcase-breathers-breather-valves2.html)) \\
+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
+|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|}}|
+====== Doherty Style Breather ======
+These are made In the USA By Speed Dealer Customs.
+[[https://speeddealercustoms.com/collections/engine-intake-fuel-system/products/smooth-doherty-style-head-breather-kit-custom-choppers|Click here to go to their website]]. \\
+  * Features:
+   * Internal rubber umbrella valve
+   * Billet aluminum.
+   * Reduce blow by oil mist.
+   * Decrease crankcase pressure.
+   * Stop gasket leaks.
+   * Will fit 1993 and up Evo type Harley motors.
+   * Knurled bodies.
+   * Available in 2 Finishes; black anodized or polished.
+   * Kit includes:
+     * (2) 6061 billet aluminum machined bodies.
+     * (2) Machined 304 Stainless Steel Bolts. \\ (either 1/2"x13 or 3/8"x16 thread patterns) and each 1-5/16" long.
+     * 4 Hi-Temp O-Rings.
+   * Also comes in other styles.
+   * Will not fit 98-01 magnetti mareli fuel injection and '08 and later FLH models.
+====== Reed Valve by Heiden Tuning ======
+Part number (15-0677) Developed by Heiden Tuning in Holland. \\
+It is sold for Yamahas out of Tampa, FL. Here is a link to view / purchase at [[https://www.mikesxs.net/blog/how-to-install-the-pcv-reed-type-valve/|Mikes SX.com]] \\
+This reed type was Positive Crankcase Ventilation valve hooks to the engine top breather vent and allows expelled air out. \\
+But the reed prevents air re-entering quickly so a very small vacuum is created in the crankcase. \\
 ====== Sifton Breather Valve ======
@@ Line 119: / Line 168: @@
 Also an unbranded part.
-====== Regarding horsepower gains from different breathers ======
-From aswracing on testing breather vents for HP gain: ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=75740&highlight=reed+valve&page=6)) \\
-<blockquote>Many years ago, I spent most of a day dyno testing breather check valves. \\
-I was writing for Battle2win magazine at the time and published my findings there. \\
-The article is here at Nightrider.com: [[http://www.nightrider.com/biketech/crankvent_test.htm|Do Crank Vents work?]] \\
-I spent several hours on the dyno testing whether or not various breather arrangements affected the power of a motor. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=20871)) \\
-Mainly it was a test of these breather check valve devices, but I also tested the recycling of the blowby versus venting to the atmosphere. \\
-{{:techtalk:ref:engmech:breather_valve_test_results_by_aswracing.gif?direct&700|}} ((chart by aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=20871&page=2)) \\
-The result labeled "kuryakyn" is the one that's recycling the blowby. \\
-So named because I used a kuryakyn adapter to send the blowby back into the intake tract. \\
-All the others are vented to the atmosphere. \\
-The bottom line was that none of them added a single iota of measurable horsepower, despite the grandiose claims of up to 7% from the manufacturers. \\
-The only thing I could get to show up on the dyno at all was the removal of the blowby from the intake tract.\\
-You can read all about the results in the Nightrider article above. \\
-One of the companies involved, ET products (maker of the Spyke Krank vent) took exception. \\
-I very carefully retested using their suggestions, but I got the exact same answer. \\
-</blockquote>

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