Crankcase Breathing |
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Crankcase Breathing |
Bulldog9 |
Sep 19 2015, 02:44 PM
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#1
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Senior Member Group: Members Posts: 705 Joined: 21-August 13 From: United States Member No.: 16,283 Region Association: MidAtlantic Region |
As I round the final corner, I need to wrap up the crankcase breather and fuel tank vent system. The 912E has a fuel filler vent that runs from the tank to a canister up front, then runs a small vacuum line to the rear that plugs into what looks like a charcoal canister. This canister also has a larger inlet and outlet. I am assuming the outlet can go to the breather can, and also lines from breather can to the inside of the air filter on the carbs.
Looking at the left side of the fan housing on the type 4 motor, I see a nipple. I'm 99% sure that this is to go to the inlet side of the vac canister. Based on some of my reading and files,, I've been planning a simple breather can. http://www.hamincgroup.com/type4-test.php I decided to draw out what I am planning, black lines are confirmed, the blue is what I am thinking. Anyone have recommendations or thoughts on this? I've seen breather cans that run from $80 - $300. Thanks Attached thumbnail(s) |
worn |
Sep 19 2015, 07:56 PM
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#2
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can't remember Group: Members Posts: 3,290 Joined: 3-June 11 From: Madison, WI Member No.: 13,152 Region Association: Upper MidWest |
I would be better able to help if I knew more about what you want to accomplish. The original design was for efi, so it cycled between capturing vaor from the tank while parked to blowing the vapors into the intake while running. I also was wondering what you meant by chimney. Makes me think of stove pipe and Santa claus. Thanks |
Bulldog9 |
Sep 19 2015, 10:25 PM
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#3
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Senior Member Group: Members Posts: 705 Joined: 21-August 13 From: United States Member No.: 16,283 Region Association: MidAtlantic Region |
I would be better able to help if I knew more about what you want to accomplish. The original design was for efi, so it cycled between capturing vaor from the tank while parked to blowing the vapors into the intake while running. I also was wondering what you meant by chimney. Makes me think of stove pipe and Santa claus. Thanks My goal = Hooking everything up right. Chimney is the oil filler 'chimney' thing with the nub for the hose that goes to the plenum on FI cars or breather box. |
Dave_Darling |
Sep 20 2015, 04:49 PM
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#4
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914 Idiot Group: Members Posts: 15,048 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California |
My goal = Hooking everything up right. The problem is that there is no "right" setup for this car with carbs. The factory never put them on the 912E. In stock form, the hose from the fan shroud would go to one side of the charcoal canister, and the large hose from the other side of the canister would go to the air cleaner for the fuel injection system. The small hose from the canister would be hooked up to the expansion tank on top of the fuel tank in a 914; I assume the 912E would be similar but I don't know what the 911-chassis cars use for an expansion tank equivalent. The oil breather would be a separate setup from the fuel tank ventilation system. --DD |
Mark Henry |
Sep 20 2015, 05:34 PM
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#5
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
My goal = Hooking everything up right. The problem is that there is no "right" setup for this car with carbs. The factory never put them on the 912E. In stock form, the hose from the fan shroud would go to one side of the charcoal canister, and the large hose from the other side of the canister would go to the air cleaner for the fuel injection system. The VW bus has the exact same system in the carbed bus, it also blew into the common air cleaner. Wasn't there a euro 914, 1800 that came with the bus carbs? |
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