ORIGINAL: Ehab

There has been some discussions about " to bypass or not" here. It is, in most cases, better to use a "propely designed" bypass system. a "system" is the intake, the bypass and the tail pipe with great consideration given to the size and power of the turbine.

Most BVM bypass sytems are well designed for bvm's jets and their recommended turbines. The exception is the P70 bypass with a Wren SS, the bypass is too small.

An inadequately designed bypass system will cause power loss and when the bypass is removed it will seem that you have more power (and you do) but it is because the bypass system was not correct to start with.

So to answer your question, it depends on your specific case... For me, I always use a full bypass if at all possible ....