Originally Posted by w41quad4

We ran a catch can with a steel wool element in the can, but instead of venting the can into the atomosphere we ran a line to a vacuum pump. This pump which happened to be in place of where our distributor would have been on our SBC created a crankcase vacuum at any RPM and was then vented to the atomsphere. So the pump basically took place of using the engines natural vacuum, using a ton of steel wool and a decent sized catch can we never saw any amount of oil being released into the atmosphere on the outlet side of the vac. pump. This was all on NA engines as thats all we could run in our class. This did show very much promise though with our engine and greatly helped any blow by we were getting before hand.