[Chuck Westcott]

Felpro makes the double lipped seal for that purpose. When we dynoed my Motor we played with the vac pop off and finalized it at 14 in. Why ? Because that is when the Oil Pressure began to spike. Also the HP peaked at 18 to 20 in, but in my style racing I'd rather have consistancy with Vac and Oil Pressure. So don't just throw a Vac Pump on there and expect huge gaines with out determing where you need to pop it off and what ring package you have. That could provide issues with wrist Pins as well as Bearings and leaks. If I were running Comp with 0/5 oil and a very low tension ring package that would be a different story. I'm not an Engine Builder, but the Guy's that do mine are among the best in the business.