Boost ?

[colinm5]

I got a autometer boost gauge recently and was thinking to myself why can i hear the turbo before i hit +boost? I was thinking that to get out of vacuum, the turbo has to be building boost correct? Ive been thinking about this for awhile, so syty guru's what do u think?

 

[0260IN3]

Re: Boost ?

I got a autometer boost gauge recently and was thinking to myself why can i hear the turbo before i hit +boost? I was thinking that to get out of vacuum, the turbo has to be building boost correct? Ive been thinking about this for awhile, so syty guru's what do u think?

The turbo is always spining and moving air, it just takes a certain amount of air movement into the engine to create a pressurized situation in the intake. The air flow is the noise you hear.