How to run your PCV to the downpipe for evacuation
I don't have a transducer. Yes it makes a small depression, easily seen by if you hold a bag up to the port. But nothing significant like a couple inches of vac
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Good discussion guys. I have been reading a lot of people having success with this over at the bullet. Most people are actually able to read a vacuum. Usually it is not much, but I figure even if I read 1-2inches of vacuum, that this would be a cheap success. Keep it comin!
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"Should" definitely work. There are a couple opposing principals at work specific to turbo applications, but yes it should work for what your expecting.
The opposing factors I see, and mind you it's a speculation...
It will be more effective with higher exhaust velocity. Exhaust velocity increases with a smaller diameter exhaust tubing which is in conflict with minimizing downstream pressures for a turbo deal.
That said, 600+ hp worth of exhaust gasses through a single 4", should work just fine. A 5-6" downpipe might be a completely different story. There are plenty of NA engines that achieve 5"hg with one tapped into each 4" collector that aren't making 600+... I assume velocity will be sufficient in your case.
I look forward to hearing about the results. Fun stuff!
The opposing factors I see, and mind you it's a speculation...
It will be more effective with higher exhaust velocity. Exhaust velocity increases with a smaller diameter exhaust tubing which is in conflict with minimizing downstream pressures for a turbo deal.
That said, 600+ hp worth of exhaust gasses through a single 4", should work just fine. A 5-6" downpipe might be a completely different story. There are plenty of NA engines that achieve 5"hg with one tapped into each 4" collector that aren't making 600+... I assume velocity will be sufficient in your case.
I look forward to hearing about the results. Fun stuff!
Last edited by SethU; Jun 28, 2016 at 12:08 PM.
Don't get me wrong I love mine and wouldn't change it
Mine works well because I have a full length 3" exhaust that the breathers tie to. But I also have a 4" fender dump on an electric cutout
So I always have high velocity across the evac, just no real chance of high pressure.
Even at idle with the dump open i still maintain good velocity out the full exhaust
Breathers go directly from valve cover to exhaust. I have the covers baffled inside
Mine works well because I have a full length 3" exhaust that the breathers tie to. But I also have a 4" fender dump on an electric cutout
So I always have high velocity across the evac, just no real chance of high pressure.
Even at idle with the dump open i still maintain good velocity out the full exhaust
Breathers go directly from valve cover to exhaust. I have the covers baffled inside
