BD turboguard - good setting? how does it work?

[subodh]

ive read alot and found some china diesel bov

and other stuff. .



china model uses a valve and takes vaccum from brakes i think?



turboguard uses boost to hold it shut and lets boost of the secondary

side to open it?

am i right? is there still a spring is the tial bov it uses?



cant afford so im building one i think.



how long does it stay open?

does it take out all the pressure or should it leav low pressure in there?



please explane