Recent content by Bkg73123

Which brings us around to the issue with using a mechanical pump. They are difficult to mount. This is the reason I was exploring venturi type vacuum sources. I have a venturi vacuum source that generates .5 inHG at 35mph and increases to 6 inHG at 75mph. My concern was how much cfm it is...

Want to avoid letting the blow by pressure be the force that evacuates the fumes to atmosphere. Prefer fresh air as much as possible in crankcase to prevent oil dilution. Want to pull vacuum through catch can on its way out to atmosphere to be a little more eco friendly.

Application primarily to vent crankcase to atmosphere and prevent from being recirculated in engine. Not looking for more hp. Not concerned with passing emissions. Just want to make sure whatever solution is implemented it performs better than stock so I don't put engine in more danger of...

Certainly there must be fresh air that the vacuum draws in. What I am trying to determine is a solution that generates enough constant vacuum to stay ahead of the blow by. I am currently attempting using simple venturi vacuum and looking into how using multiple venturis might work.

Not allowing blow by to accumulate. Staying ahead of the blow by with constant negative pressure greater than the positive pressure of the blow by even in boost conditions.

Thank you MRFMengineer, I hadn't heard of dry sumps. I have looked into mechanical vacuum pumps for installation under the hood primarily for running air tools on utility vehicles. They are not really designed to work for this purpose. There were others that need to be rebuilt every year which...

If I want to adequately evacuate the crankcase, by maintaining a constant negative pressure in it, by using multiple sources of vacuum in parallel, it sounds like the most important thing in this situation is how much cfm the vacuum source can evacuate from the crankcase. Having a 15 inHG vacuum...

I appreciate the participation but please let's stick to the original question proposed. FYI...The engine is a turbo. The intake pressurizes as you increase throttle.

In this scenario the intake pulls less and less vacuum the more the throttle plate opens until it actually goes the other way and pressurizes the crankcase through the same port. The method you explain would allow pressure to build in the crankcase if the vent(s) it is using to evacuate to...

Thank you. But...Dang it. I don't know what to do with that information. So the application can be explained like this... The crankcase in an engine is constantly pressurizing from air leaking past the piston. There needs to be a constant vacuum source pulling this pressurized air out of the...

Hi everyone. I am just a DIYer working on projects. Happy to participate here.

I have two vacuum sources each pulling 1 inHG. If I connect the vacuum sources to a Y-connector, with identical sized hoses, so that each pulls on one tip of the Y, will I get 2 inHG vacuum on the remaining hose, or will I get 1 inHG with more cfm? Thank you, B