Boost gauge install

[Jacobcurtis]

Hi everyone, I’m new to this forum and I had a look around for installing a boost gauge to a ba xr6t. The thing I am unsure about is what do I install the boost line to? I tried the near the cross over pipe at the BOV but it read mostly negative pressure. If someone could help me out that would be awsome! 

Thanks

[k31th]

All cars run negative pressure (if zero is set to be atmospheric pressure, which is actually ~14.7 PSI above a vacuum, which is true zero pressure) to allow the air to be sucked into the intake as the atmospheric pressure is higher than the intake pressure so the air runs into the engine to "equalize" the pressure between the two.

 

Boosted cars are only above zero when you're on boost.

 

When you're installing a boost gauge, the easiest place to put a t-piece is into the line that is the "source" for the BOV, like it sounds like you've done.

 

[El Andrew]

What he said. If the gauge is showing big negative at idle, some negative at light to medium throttle and positive when you boot it, everything is working properly. Will show about zero when you switch off.

BOV vac line is where I installed mine on my BA. What gauge did you get?

[Jacobcurtis]

Ok Awosme I was worried I did it wrong, I had it installed to the small hose that comes off the BOV and goes down near where the fuel pressure reg is. 

Thanks heaps guys