Please not another crankcase ventilation thread.
#181
I don't think it will work well the way it is drawn. You will end up with vapor coming out of the "fresh air in hole" and you will also end up with light oil vapor entering the turbo and increasing the chances of detonation. Oil vapor lowers the octane of the air/fuel mixture.
B. how is this different than using a stock PCV system, in terms of oily air entering the combustion chamber?
The turbo draws an insane amount of vacuum with the venturri
Real questions.
#185
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All engines have blow by. Engines have more Blow by as you increase cylinder pressure due to boost. The suction you are betting on having is only related to how much blockage there is in your air filter element. For a turbocharged engine it is highly desirable that you have nearly zero blockage due to an air filter element. There may be a bit of a draft and Bernoulli's principle might apply but only in very high Inlet velocities. As it is drawn, your suction hole will be a path of low resistance and the likely exit for a lot of blow by.
#186
I would use the passenger side to be the exit the same way it comes from the factory since the baffle is on that side. You could also run a line on your fresh air side to a slash cut facing the opposite direction in the pre-turbo intake tube so you get + pressure on the one line and vacuum on the other.
I guess Im going to have to measure how much vacuum this thing makes, as well as the volume it pulls. Although I full understand what you guys are saying, Its all a bunch of guessing without knowing how much air I can actually eveacuate through the intake. Science, coming soon.
All pictures pre final assembly. Everything was deburred and polished.
Last edited by ryansmoneypit; 07-25-2017 at 02:38 PM.
#189
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My **** works well, is high volume, and doesn't end up with any oil into catch can.
No you can't see it.
Ryan_G has seen it and is doing something similar. It isn't actually difficult. Just a bunch of science and ****.
No you can't see it.
Ryan_G has seen it and is doing something similar. It isn't actually difficult. Just a bunch of science and ****.
#190
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Since I've been drinking and I'm in a very generous mood I will give you some Clues. Trying to cram the blow by created by 300 horsepower through a set of little bitty ports and lines designed for the blow by of 100 horsepower through the same displacement engine creates a shitload of pressure differential and therefore velocity through those little bitty ports. High velocity tends to carry liquids suspended in gases much more easily than low velocity created by the larger passages and hoses. If you double the horsepower then double the breather tube capacity. If you triple the horsepower ******* triple the breather tube capacity. This includes the little bitty *** ports inside the valve cover. Open those bitches up and let them breathe. If you slow down the velocity of the vapor then the oil will settle out of the stream.
And please don't feed that vapor to your engine. It's not tasty.
And please don't feed that vapor to your engine. It's not tasty.
#192
Six,
You offered little to zero new information in that mini rant..
you need to open up the ports on the valve cover- no ****
oil particles carry better in high velocity- yes we know that
300 hp makes a lot of blow-by- yerp, got that one too
I thought most of us agreed that 1/2" (-10) lines were the new normal. I definitely see why the intake is a poor source of vacuum, because oily air. How much does tiny bit of oil affect things? no idea. Impossible to answer. too many variable. So using the intake is off the table for now. I really dont want to smell fumes. Its not a daily but I still cant stand oil fumes, and a bunch of VTA points sounds like a stinky solve. Now Im back to thinking about dumping stinky air back into my exhaust.
How about some pictures of what you have come up with, you drunk dick.
You offered little to zero new information in that mini rant..
you need to open up the ports on the valve cover- no ****
oil particles carry better in high velocity- yes we know that
300 hp makes a lot of blow-by- yerp, got that one too
I thought most of us agreed that 1/2" (-10) lines were the new normal. I definitely see why the intake is a poor source of vacuum, because oily air. How much does tiny bit of oil affect things? no idea. Impossible to answer. too many variable. So using the intake is off the table for now. I really dont want to smell fumes. Its not a daily but I still cant stand oil fumes, and a bunch of VTA points sounds like a stinky solve. Now Im back to thinking about dumping stinky air back into my exhaust.
How about some pictures of what you have come up with, you drunk dick.
#193
I have skimmed over this here n there.
Hate to cross link, but this may help some of you.
The 4G63T PCV System | DSMtuners
Hate to cross link, but this may help some of you.
The 4G63T PCV System | DSMtuners
#195
So what exactly is the concensus on valve cover modifications when running 20ish psi of boost? I am seeing some excess crankcase pressure that is causing turbo to leak oil past the piston seal. Currently have pcv valve hooked up to catch can and catch can to intake mani. Driver side hole has a little breather filter.
#196
fwiw i had so much blowby that a simple trip to the shops was 500ml of oil out the top of the valve cover.
i ended up drilling the sump and running a new line to catchcan....
I dont know if i spurt oil anymore, maybe the crankcase pressure simply bypasses the valvecover and goes straight to catch can.
Note": engines in the shop getting honed. New rings and bearings otw.
i ended up drilling the sump and running a new line to catchcan....
I dont know if i spurt oil anymore, maybe the crankcase pressure simply bypasses the valvecover and goes straight to catch can.
Note": engines in the shop getting honed. New rings and bearings otw.
#197
So what exactly is the concensus on valve cover modifications when running 20ish psi of boost? I am seeing some excess crankcase pressure that is causing turbo to leak oil past the piston seal. Currently have pcv valve hooked up to catch can and catch can to intake mani. Driver side hole has a little breather filter.