[Gaz64]

The venting needs to be good enough to replace the fuel the engine is using at peak consumption.

So 600 hp, 300 lb/hr, 5lb/min, about 1 gallon/minute, about 4000cc/min. 66cc/sec.

Can a 1/8" hole flow that much air?

There are other ways to have to filtered air as a venting supply.

Gary