CCV mod to exhaust, anyone test vacuum? - Ford Powerstroke Diesel Forum
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Old 09-20-2013, 04:09 PM
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CCV mod to exhaust, anyone test vacuum?

I'm putting together an intercooler for my 97, and want to relocate the CCV. Was thinking of adding it to the downpipe or cat delete pipe. Has anyone welded in a tube and tested it for how much actual vacuum (if any) it pulls? I have to assume it will do the same as the intake, but it's also a pretty big exhaust to actually pull vacuum at idle.

Thanks!
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Old 09-20-2013, 08:26 PM
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Well the exhaust would not pull near as much as the intake being as how the turbo is not sucking it out
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Old 09-20-2013, 09:12 PM
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The exhaust will flow as much air as the intake will, it doesn't just disappear into the engine.

But it is a much larger pipe, so the speed will be less. I was thinking that if I extend the CCV pipe towards the middle of the exhaust, it may keep a suction. I'll run the vacuum gauge into the cab and hog on it. Be a neat exercise.

So no, you haven't done it I take it?
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Old 09-20-2013, 09:27 PM
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I'm sorry you are rite, but I meant exactly what your saying with diameters of pipe, no mine does not hook to the exhaust it just dumps at the rear axle
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Old 09-21-2013, 04:25 AM
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deisel engines don't pull vacuum the way gassers do, hence the vacuum pump
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Old 09-21-2013, 11:51 AM
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I meant on the exhaust evacuation, as a venturi effect. Pulling vacuum on the CCV system.


Edit: 251fifty, how much dripping do you have out of the tube? My buddy has an EX with 160k that drips just barely, but I'm thinking with my 280k mine might push a little more oil out.
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Old 09-21-2013, 01:18 PM
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run the ccv run and let gravity keep the oil down. there should be no dripping.

as for the exhaust pulling vacuum i understand now i would doubt the would be much
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