Anyone using using them? Pros and cons?

I know some guys do. I think the biggest concern at one point was the vacuum causing pin oiling issues in an endurance engine. But I think as long as you dont get carried away with too much vacuum, it should be ok. I'm sure someone here has ran them and can elaborate more on them.

I can't speak from experience. But I'm running a dry sump on my new build and plan on pulling vacuum. If you want success a DLC coated pin with a little added clearance on the pin bore is mandatory. If done properly I can't possibly see any cons only pros.

We have a great system, but if any +HP it won't show on your GPS. This system will help keep your bilge clean/spotless?....assuming the oil from your valve cover breathers is your only source of unwanted oil. To do it right, expect to spend $2000+ with a single pump system for both engines. You will need -12 braided lines, pop-off valve, vacuum control valve, vacuum gauge at the dash, a catch can system w/drain and a vent system out of the bilge. If you are still interested, PM me.

I had Jerry at Stainless Marine fab some stainless drag race style pan vacs back in 1992. He welded in some bungs at the collectors and I ran hoses to the valve covers . I never put a vacuum gauge on them , but you could feel vacuum on the hoses and bilge was much cleaner after a race. They were basically 5/8 stainless pipe cut at approx 45 degree angle .

We tried a similar rig prior to the vacuum pump system. To much heat created in the rigging, melted hoses, etc. for a marine installation. The low cost solution is to just power wash the bilge regularly.

most all of the setups are for drag race(short tern use) and I don't think would hold up well on long runs...I think a good catch tank with good plumbing a better choice here..Rob

[ATTACH=CONFIG]537941[/ATTACH] Here is where we ended after about 5 try's.

You can weld a tube in the header or tailpipe and cut the tube on an angle in the exhaust. Set in down about an inch. Hook the hose up to that, and it pulls great vacum for free. And pulls smoke and oil out the back. Or old school hose to the air intake, the problem is after you beat on boat then come back to idle it may not pull the smoke in.

Peterson makes a nice one... Thats the route I went this year