Differences

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--- techtalk:ref:engmech05j [2020/10/07 22:10]
hippysmack [Doherty Power Vent]
+++ techtalk:ref:engmech05j [2020/10/12 00:23]
hippysmack [Doherty Power Vent]
@@ Line 1: / Line 1: @@
 [[:techtalk:menu|{{  :techtalk:gototechnicalmenu.jpg|}}]]
 ====== REF: Engine Mechanicals - Sub-05J ======
+====== Aftermarket Breather Valves ======
 \\
 ====== Plumbing an External Breather Valve ======
@@ Line 25: / Line 26: @@
-====== Aftermarket Breather Valves ======
+====== List of Aftermarket Breather Valves ======
 **Finding a better breather valve**: ((bunny32 of the XLFORUM http://xlforum.net/forums/showthread.php?t=15705&page=2)) \\
@@ Line 74: / Line 75: @@
   * 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 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))  |
-|{{: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 http://xlforum.net/forums/showthread.php?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 106: / Line 106: @@
 ====== 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 http://xlforum.net/forums/showthread.php?t=146084&page=18))|  Doherty Power Vent ((Photo by goblin_dust of the XLFORUM http://xlforum.net/forums/showthread.php?t=72099&highlight=wet+sumping&page=23))  |
+|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))|
-|{{:techtalk:ref:engmech:breather_mod_by_rioroosen.jpg?direct&300|}}|{{:techtalk:ref:engmech:deimus_mod_2_by_goblin_dust.jpg?direct&300|}}|
+|{{: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 125: / Line 171: @@
 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>