I have a set of Lightning headers and I'm thinking of adding O2 bungs and while I have them off, adding extractors. I know they don't add a lot of horsepower, but they help the rings seal better and last longer. Has anyone tried this and with what level of success?

Are you talking about ''Burn Downs"?? Where the exhaust pulls a vacuum on the crankcase?

Why haven't the vacuum pumps been used either. I think NASCAR even uses them.

Yes I am, I've never heard of them called "Burn Downs" before. I have looked at Vacuum pumps, but they need to be rebuilt after every season. Extractors just seemed a low buck way to gain a few hp and increase engine life.

You have my attention....what are "Extractors" exactly?

I have looked at Vacuum pumps, but they need to be rebuilt after every season.

Doesn't everything on a f%^$%^* boat?

We used them on drag boats back in the day!! you weld in a port in each header that as the exhaust gases pass by the port it creates a vacumn that you can use to remove crankcase presuure, like a PCV valve but you don't reburn the fumes, it just goes out with the exhaust,

It worked real good with dry Headers

Used them for years on drag engines , now they all use pumps .

http://www.cpperformance.com/p-14258...ac-system.aspx

http://www.cpperformance.com/p-13507...-breather.aspx

they work fine on drag engines that only see a few seconds of WOT but when run for extended periods they can pull oil from the wrist pins and cylinder walls. NASCAR engines run pin oil drilled rods and oil squirter for the bottom of the pistons, etc, etc, so they can use them without issue. if the engine is not set up for all the additional oiling then the evacuation can cause more harm than the few HP you would gain. just my .02 cents though.