If u load forward u don't need to tape your muffler (tail pipe) ?
I don't tape my muffler. IMO that's more of an "old wives tail" than a real concern. The only way for air to pass through the turbo is if it has somewhere to go. Unless you have MUCH bigger problems, than worrying about the turbo spinning without pressurized oil on the bearings, the air can not pass through the turbo, and/or engine.