My homemade catch can! Did i do it right??
08-06-2005, 04:02 AM
#1
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My homemade catch can! Did i do it right??
Well i decided today to make a DIY catch can. So i started off with a compresser filter for a air compresser i got at walmart. This is how i hooked it up. I connected the one end right into the top of that black box where the pcv valve used to be. Then i took the other end and needed to do something for pre-turbo vaccum. So i took a small piece of piping and put a 3/8 fitting into it about a inch away from the turbo and about a inch away from my filter (aka metal screan). So i was curious to if this will get good vaccum for it to work propperly?? Here are some pics!
The hose coupler is connected directly onto the turbo.
The hose coupler is connected directly onto the turbo.
08-07-2005, 11:04 AM
#4
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Re: My homemade catch can! Did i do it right??
Hey its been a couple days of driving it with the homemade catch can and i havent really seen any oil build up in it yet? Is this normal? I just hope its getting good vaccum.
08-07-2005, 12:03 PM
#5
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Re: My homemade catch can! Did i do it right??
Im not sure if im 100% correct on this one, but I dont think you should be getting much oil unless there is a lot of blowby in your engine. It may be doing a good job of releasing pressure and gasoline vapors without filling up with oil.
08-07-2005, 03:15 PM
#6
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Re: My homemade catch can! Did i do it right??
No oil in there is a good sign, nothing to worry about. You don't even need to connect one side of it to the pre-turbo intake, because the vaccuum there is so small it is negligable. I just leave the other fitting on my catch can open to the air.
08-07-2005, 11:05 PM
#7
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Join Date: Jul 2004
Posts: 25
Re: My homemade catch can! Did i do it right??
actually i read a very long article on this...
i had origionally planned on using a mid-80s electric vac pump for the MC as a vac for the venting of the crank case. BUT i guess i wan't gonna be the first with that idea, because without resistors and extensive wiring the GM vac would have too much vacuum and end up sucking out oil.
So i read up on the second best method. Putting an attachment to the exhaust after the cat/test pipe with tthe exit facing the muffler causes almost the exact amount of vacuum that is acceptable. BUT running a catch can is a great idea so you don't burn off liquid oil and alarm yourself and others under hard acceleration.
But from what i understand older domestics can gain about 30+ HP from having some decent vac to the crank case, so on hondas you'd expect something..but not really. If anything the engine runs smoother (so i read) and it helps to extend engine life, especially under boost.
w00t
i had origionally planned on using a mid-80s electric vac pump for the MC as a vac for the venting of the crank case. BUT i guess i wan't gonna be the first with that idea, because without resistors and extensive wiring the GM vac would have too much vacuum and end up sucking out oil.
So i read up on the second best method. Putting an attachment to the exhaust after the cat/test pipe with tthe exit facing the muffler causes almost the exact amount of vacuum that is acceptable. BUT running a catch can is a great idea so you don't burn off liquid oil and alarm yourself and others under hard acceleration.
But from what i understand older domestics can gain about 30+ HP from having some decent vac to the crank case, so on hondas you'd expect something..but not really. If anything the engine runs smoother (so i read) and it helps to extend engine life, especially under boost.
w00t
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