Differences

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--- techtalk:ref:carb06 [2019/07/14 15:21]
hippysmack [Using Spark Plug Boot Connectors]
+++ techtalk:ref:carb06 [2019/09/15 16:53]
hippysmack [Sub Documents]
@@ Line 2: / Line 2: @@
 ====== REF: Carburetor, Intake Manifold & Exhaust ======
 ====== Aftermarket Air Cleaners and Modifications ======
-Some air cleaners are not set up to allow for the breather bolts into them and are only held on by the three small carb front bolts. ((Shu of the XLFORUM http://xlforum.net/forums/showthread.php?t=146084&page=11)) \\
+\\
+====== Air Cleaner ======
+===== Sub Documents =====
+  * [[techtalk:ref:carb06a|Homemade Air Cleaner Assembly]]
+See also [[techtalk:ref:engmech05#breather_vent_relocation|Breather Vent Relocation]] in the REF section of the Sportsterpedia. \\
+Some air cleaners are not set up to allow for the breather bolts into them and are only held on by the small front bolts. ((Shu of the XLFORUM http://xlforum.net/forums/showthread.php?t=146084&page=11)) \\
 For these breathers you would need to get a head breather kit and carb support bracket. \\
 The breather kit routes the head vents to the ground (or atmosphere) while the carb support bracket keeps the carb in the intake. \\
+\\
+Below is a breather vent re-direction on an EFI model. ((jcmellis of the XLFORUM http://xlforum.net/forums/showthread.php?t=1179974)) \\
+A small amount of crankcase oil was dripping into the A/C on a Figure Machine/Engineering air cleaner assembly. \\
+This air cleaner uses the stock Harley-Davidson breather tubes. \\
+There was no drip into the stock a/c but using the same breather tubes, it did with the afrtermarket A/C. \\
+This mod doesn't bypass the air cleaner. \\
+It doesn't solve the problem but rather just hides it. \\
+You still have the excess oil but this will arrange for it to run straight into the intake and away from the A/C. \\
+The problem is that the oil vapor needs to make a 180 degree turn, up and over the lip of the kit's bell-mouth, into the throttle body. \\
+A rubber hose would work, except the radius of the curve is too sharp due of the limited space inside the filter. \\
+It'd take some sort of semi-rigid tube. \\
+The Screaming Eagle Stage 1 air cleaner deals with the venting issue using two small preformed rubber tubes or hoses. \\
+The Figure Machine air cleaner utilizes the stock Harley breather hoses (63520-04). \\
+The hoses fit perfectly over the breathers. \\
+The only problem is that about 3/8" needs to be trimmed from both ends to fit the different internal dimensions of the filter/air cleaner. \\
+(The photo above shows the stock part on the left and the trimmed part on the right.) \\
+Once trimmed to size, the hoses are positioned at the mouth of the throttle body. \\
+{{:techtalk:ref:carb:hd_breather_mod_1_by_jcmellis.jpg?direct&300|}} ((photo by jcmellis of the XLFORUM http://xlforum.net/forums/showthread.php?t=1179974)) {{:techtalk:ref:carb:hd_breather_mod_2_by_jcmellis.jpg?direct&300|}} ((photo by jcmellis of the XLFORUM http://xlforum.net/forums/showthread.php?t=1179974))
 ====== Running the Breather Hoses (91 and UP) ======
 ===== How the umbrella ( head breather) valves work =====
@@ Line 37: / Line 65: @@
 If the vent lines are piped above the exit point in the heads, oil out of suspension will not drain back into the engine. \\
 The oil would have to run uphill to get from the heads to the rocker boxes and into the lower end. \\
-So there is no functional advantage to running the lines higher then the head vents. \\
+So there is no functional advantage to running the lines higher than the head vents. \\
 {{:techtalk:evo:engmech:91-03_sportster_head_breathing_2_drawing_by_hippysmack.jpg?direct&300|}} ((drawing by Hippysmack)) {{:techtalk:evo:engmech:04_up_head_breathing_drawing_2_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack))
@@ Line 53: / Line 81: @@
 Vent lines mounted high tend to promote a mixture of oil and condensation settling near the head connection of the hose. \\
-{{:techtalk:ref:carb:kuryakyn_breather_bolts_1_by_scar55.jpg?direct&300|}} ((photo by Scar55 of the XLFORUM http://xlforum.net/forums/showthread.php?t=1690623)) {{:techtalk:ref:carb:kuryakyn_breather_bolts_2_by_scar55.jpg?direct&300|}} ((photo by Scar55 of the XLFORUM http://xlforum.net/forums/showthread.php?t=1690623))
+{{techtalk:ref:engmech:kuryakyn_breather_bolts_1_by_scar55.jpg?direct&300|}} ((photo by Scar55 of the XLFORUM http://xlforum.net/forums/showthread.php?t=1690623)) {{techtalk:ref:engmech:kuryakyn_breather_bolts_2_by_scar55.jpg?direct&300|}} ((photo by Scar55 of the XLFORUM http://xlforum.net/forums/showthread.php?t=1690623))
 ====== Breather Bolts ======
 Kuryakyn banjo bolts: \\
-{{:techtalk:ref:carb:kuryakyn_banjo_breather_bolts_1_by_mick42.jpg?direct&300|}} ((photo by mick42 of the XLFORUM http://xlforum.net/forums/showthread.php?t=2074032&page=2)) {{:techtalk:ref:carb:kuryakyn_banjo_breather_bolts_2_by_mick42.jpg?direct&300|}} ((photo by mick42 of the XLFORUM http://xlforum.net/forums/showthread.php?t=2074032&page=2))
+{{techtalk:ref:engmech:kuryakyn_banjo_breather_bolts_1_by_mick42.jpg?direct&300|}} ((photo by mick42 of the XLFORUM http://xlforum.net/forums/showthread.php?t=2074032&page=2)) {{techtalk:ref:engmech:kuryakyn_banjo_breather_bolts_2_by_mick42.jpg?direct&300|}} ((photo by mick42 of the XLFORUM http://xlforum.net/forums/showthread.php?t=2074032&page=2))
 ====== Mods ======
-===== Using Spark Plug Boot Connectors =====
-  * Parts: \\ Available at most auto parts stores.
-  - (2) - spark plug boots (silicone)
-  - (2) - 3/8" plastic hose splices/connectors
-  - (1) - 3/8" plastic hose "T"
-  - (1) - 18" 3/8" rubber tube (apx)
-  - (1) - small cheap gas filter
-  - (2) - small hose clamps
-Cut the spark plug boots off flush where they make a 90° turn. \\
-These will then fit over the hollow breather bolts that hold the air cleaner backing plate on and will be flush with the backing plate. \\
-You can modify the stock air filter by cutting off the two protrusions that go over these two bolts. \\
-(bosses that let the oil into air filter). You can fill the holes with JB weld. \\
-Several 1" holes were drilled in backing plate below for better air flow. \\
-Connect the spark plug boots to two small pieces of the hose with the plastic hose splices and connect these together with the "T". \\
-Drill a hole in the air cleaner backing plate bottom and connect another length of hose to the bottom of the "T" and run out of this hole. \\
-Some like to install a small gas filter inline using the two hose clamps (piece of mind in deterring dust or dirt entering from backflow).
-However, there is no measureable backflow of air into engine unless the breather valve is not functioning properly. \\
-Then run more hose down to about two inches below frame. \\
-All blowby oil now goes to ground and not into air cleaner. \\
-The spark plug boots should fit snug. \\
-Route the hose with as few bends as needed and the filter out of the way.
-|
 ====== Pics of Air Cleaners ======

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