crankcase preassure reroute

[jonathan]

what kind of hose is the clear line that you are using? Is it automotive?

no its not automotive it just vinyl hose from rulal king. i thought that i was going to see the vapors go thourgh the hose but i cant lol

 

[franklin2]

I see one of the other guys in the thread is using what looks like Gates heater hose. I have used this type of hose several times in these applications, and it will eventually get very soft and start disintegrating.

That vinyl hose over time will get hard as a rock from the oil.

 

[jonathan]

I see one of the other guys in the thread is using what looks like Gates heater hose. I have used this type of hose several times in these applications, and it will eventually get very soft and start disintegrating.

That vinyl hose over time will get hard as a rock from the oil.

i'll worry about that latter.

 

[Brimmstone]

We've been using something similar for years on race cars but we do use check valves before the pipe enters the exhaust to prevent exhaust from backfeeding into the crankcase. I've seen the hoses running to the check valves actually collapse shut when the throttle is down when doing a dyno pull.

 

[Goofyexponent]

We've been using something similar for years on race cars but we do use check valves before the pipe enters the exhaust to prevent exhaust from backfeeding into the crankcase. I've seen the hoses running to the check valves actually collapse shut when the throttle is down when doing a dyno pull.

MEAING.....that a SEVERE vacuum is being pulled!!!

 

[Goofyexponent]

Pressure(1) + Velocity(1) = Pressure(2) + Velocity(2). If you increase velocity, pressure goes down. Increase pressure velocity goes down.

I don't know about the rest of the post, so I omitted it.

This is right, increase velocity and the pressure goes down. EXACTLY HOW A SIPHON FEED PAINT GUN WORKS!!. The pressurized air NEVER touches the paint in the cup. The paint is not forced out by the air, it is drawn out by a change in pressure. The fast moving air from the compressor (exhaust gasses in an engine) create a vacuum in the line from the paint cup (the RTD in our case) and then cause the contents of the paint cup to be introduced in the high velocity air stream (the crank case emissions into the exhaust)

I am going to be an azzhat now and say I am right on this The exhaust gasses will NOT flow back into the crankcase unless th exhaust is comprimised or blocked off somehow. THEN the exhaust WILL enter the crankcase.

The exhaust gas might be under LOW pressure, but it is moving quite quickly inside the pipe. If the fitting was welded in a 30* angle TOWARDS the direction of the exhaust gasses, you WILL draw vacuum. Add to the fact that the crankcase is under slight pressure, and you have a working RTD into the exhaust.

The LARGER the exhaust the less velocity you have and less vacuum. A 2.5" exhaust will have more velocity than a 5" exhaust.

I am basing my argument on a 2.5 - 3.5 inch pipe.