Venting crankcase (1 Viewer)

[Sundowner]

Yeah it is all down hill so nothing will pool up. I was just wondering if the air moving under the hose at high speeds might restrict it a little bit.

Proper draught tubes face rearward, and the air moving past has a scavenging effect.

I would think running that filth into your clean air intake can only have negative consequences upon the engine, and do nothing good mechanically speaking?

Depends on whether or not the engine was designed for that kind of system; there are a few Toyota engines that utilize it, and many that don't. No universal answer there.

But its good for the environment

In a way, yes, it is.

 

[athensrep]

What about venting a 1HZ or 2H to atmosphere? The YouTube engineers theory is that the vacuum from the intake appropriately pulls the gasses from the motor, which in theory makes a lot of sense to keep that pressure down. Downside being an oily intake. A lot of info saying to not vent or use a catch can.

Lot of conflicting info on the subject.

 

[Stiles]

I didnt like the idea of oily nastiness going into clean air intake, but it seems that tube also serves a helpful vacuum function, not just venting function. I was gonna vent into space, but have changed my mind after more extensive research.

 

[Sundowner]

You know, it's almost like Toyota knows what they're doing, sometimes...

 

[FJBen]

What about venting a 1HZ or 2H to atmosphere? The YouTube engineers theory is that the vacuum from the intake appropriately pulls the gasses from the motor, which in theory makes a lot of sense to keep that pressure down. Downside being an oily intake. A lot of info saying to not vent or use a catch can.

Lot of conflicting info on the subject.

I’m venting my 13bt straight atmosphere. They are supposed to be vented to intake before turbo, but that dumps all the greasy mess straight into the turbo. Personally I think it’s much better to vent to atmosphere rather than dump that stuff in your turbo or intake

Cummins uses different catch cans that drain back into block that don’t route into intake.

My old Isuzu diesel was just a tube to the ground. My Kubota tractor the same thing.
Other manufacturers do it differently as well.


All this to say, a 2h or 1HZ will be fine most likely either way. There will be far more issue stemming from a blocked tube than where it’s venting.

 

[jules781]

I didnt like the idea of oily nastiness going into clean air intake, but it seems that tube also serves a helpful vacuum function, not just venting function. I was gonna vent into space, but have changed my mind after more extensive research.

What are you going to do go back to the air intake.

 

[Sundowner]

My old Isuzu diesel was just a tube to the ground. My Kubota tractor the same thing.
Other manufacturers do it differently as well.

My tractors were the same; basically a straight draft tube.

All this to say, a 2h or 1HZ will be fine most likely either way. There will be far more issue stemming from a blocked tube than where it’s venting.

Agreed.

 

[athensrep]

I guess I what I’m getting at is some of the “experts” say the closed loop is the way to go. As RPMs go up/air intake increases and so does the speed in which the vapor being pulled back into the motor. The argument I’ve seen is that an engine cannot expel blow-by as effectively as the vacuum from the intake. Sucked out vs. being puffed out.

Either way, mine was a tube pointed at the ground. I dont have hardly any puffing from the 2H at all. The 1HZ is in pieces so yet to be determined how much it has.

 

[jules781]

Yeah that's fair enough. I'm going to leave it vented. Have it under the gearbox sticking out through a hole in the bash plate.