I got an email from the company saying ill have it in 1-3 days. As soon as I get them ill figure out what I have to do to get it to work. Probably just two 5/8 to 1/2 hose adapters (the plastic ones) and just use 2 extra hose clamps. I will call Napa to see if the sell hose with one end being half inch and another being 5/8 for a cleaner looking install

 

keep us informed, and part numbers handy

 

My friend at napa found the hose for me. I ordered 2 of them as they have one end thats 1/2" and the other end is 5/8" both are a foot long as 2 feet will be enough. Now like I said my hose is squishy from having oil in it so I am replacing the entire hose from the drivers side valve cover to the Whipple.

Napa Part Number NBH 10051

 

I'm not seeing how these will work with a Whipple since the lines are connected before the compressor and will not see any positive pressure unless some have tapped into the intake runners. If you tap into the intake runners and use the Krankvents then I can see how they would help keep oil off of the intercooler at least on a Whipple. Some of the other superchargers it may be different depending on where they tap into the intake system. If I'm missing something please let me know but it seems like they are just check valves. I do see that this system will work, but it just seems to depend on where in the intake system you are hooked up.

Tim

 

When the Whipple or any type of force induction makes boost it causes blowby. This is when boost goes around the piston rings and into the crank case. Once in the crank case it then goes through the PCV taking oil from the crank case and putting it into the intake system. If you look inside of my whipple you can see engine oil that has made its way into the intake.

These will stop the boost from forcing air through the crankcase into the intake but being a 1 way valve allow vaccum into the crankcase which will allow the engine to operate normally. The spring in the krankvents is so strong it would take 50PSI of boost just do basically what a stock PCV does now. Problem with a PCV is the spring inside of it is very weak, but works good with a vaccum only N/A motor for the most part.

 

The crankcase always gets pressurized by blow by whether its N/A or supercharged both from the compression stroke and the power stroke with the powerstroke beinging the greater of the pressures I think we can agree on. Reading on the website for Krankvents it says they are designed to prevent the crankcase from being pressurized from boost pressure feeding through the PCV into the engine, pretty much a check valve. Since a Whipple has the PCV hooked up on the vaccum side it will not pressurize the crank case through the PCV only through blow by of the rings. The air must still leave the engine through the PCV and into the vaccum side of the intake. The air is only flowing one way and that is from the crankcase to the vaccum side of the intake on a Whipple. I'm not trying to start an argument here I'm just trying to explain what I see on this system and maybe not explaining it to well. I just can't see how a Krankvent installed on a Whipple setup would do any good since there is no boost pressure feeding back into the engine from the PCV. If the PCV is hooked up on the boosted side of the intake then the Krankvent system will work. Did I explain my view any better or not? Hopefully your not just hearing BLAH BLAH BLAH from me.

Tim

 

Well Ive read all over where people with Whipples, Eatons, turbos etc all have it working for them. I can not pretend I know all the factors that come into play and what you say sounds very logical. Until I install them and get a better understanding of what all is going on I really cant say. All I know is people say it works, and because of that Ill be a guinea pig.

 

Let us know how they work. I'm really not here to beat this horse to death and beat it some more. Maybe I'm just trying to think to much, my parents would be suprised with that I'm sure. Test them out and see if it helps the oil. I know I my Whipple I had the TB off doing some other things within a few hundred miles and was shocked with the amount of oil in the plenum. I went and looked at my stock intake and there was a good amount of oil in there to so it seems normal.

Tim

 

After more reading it appears the units only allow vaccum in the motor and nothing out so if nothing comes out then no oil comes out

 

Here is my take on the whole thing:

The PCV system is a closed system. Under vacuum the valve is open allowing crankcase air to sucked into the intake manifold to be burned in the combustion chamber. As crankcase air is sucked out fresh air air is introduced to the crankcase form the air inlet side on the driver side valve cover. As you accelerate the vacuum goes to atmosphere and the valve closes. Because this valve is closed the other side of the system, the inlet side, now goes to vacuum and allows oily air to be sucked in via the throttle body.

When you go into boost the same thing happens. The only difference is the degree of pressure.

One thing that will offset this is the degree of blow by gases that pressurize the crankcase. A lot of blow by will push more oily air out the driver side and or the PCV valve side if the blow by pressure is greater than the boost pressure and the spring pressure pushing the PCV valve shut. If the capacity of the driver side system to depressurize the crankcase has been tampered with it may also cause the PCV to open.

 

For three weeks now I have the catch can installed on only the 5/8" driverside hose. My oil cap has been a vented one from Ford for 1.5 yrs. The thought on unmetered air has always bothered me though I have never run lean and the truck was tuned with the vented cap. Anyway I am looking forward to checking the inlet pipe this weekend to see the results.

 

Well like I said, I would keep your catch can. I may still get one depending on how well these actually work. I think they may be delivered today I'm not sure.

 

Both of you guys keep us updated on how your systems work. I've been looking into this issue of the oil and think the Krankvents would be I nice clean setup but I'm just not really seeing how they are different enough from the PCV. I have 2 ports on my intake runners that I tapped and plugged in case of future ideas and am considering something with those to at least keep the oil off of the intercooler. I just haven't figured out what I want to do yet so keep us all updated.

Tim

 

I got the krankvents today. They have big arrows on them which points away from the valve covers for easy installation. So they are one way valves but the interesting thing is the end that goes to the valve cover hold a vaccine. So that makes me think anytime the trucks make vacuum when you first start it, it will hold them closed and instead of the Whipple pulling oil out with weak vacuum the crank vacuum will keep the vents closed. Right now nothing keeps the Whipple intake vacuum from sucking oil into it.

 

Phone changed some words on me in the last post. I changed out the old pcv driverside hose and installed the krankvents very clean install. I am going to take off the throttle body and clean the intake up and see how these do