Turbo vacuum necessities?
 

ok a few random questions regarding vacuum hookups.

Firstly, I've removed the air pump. Just cap that little line off from that ?

I'm going to run a grommet off my intake near the filter into my catch can and then to the oil filler neck.

The post throttle body line I'm going to use for my boost guage.

What about the other two lines that were connected right before the Throttle body. Do those just need vacuum(pre compressor) to function. OR do they need to be in the pressurized pipes before the throttle body?

Thanks in advance for any help! :D:

Air pump line can be capped, it is switched by a relay, so not much good for anything else.

The post-TB nipple is a good boost gauge source.

The oil metering air, and filler neck vent (with catch can in line) need to go to a metered (after MAF) nipple, but before the turbo.

The jet mixing air should be taken from the pre-throttle plate tubing, so it sees turbo outlet pressure.

To tell the difference between jet and OMP, the jet will suck a good flow at idle, and stall the engine if left open to atmosphere, the MOP is a much smaller flow.

S

Exactly what I needed! Thanks StealthTL!

the post throttle body nipple can also be used for a bov signal.

Yep, that is my manifold pressure reference. Guage and BOV off that. :yesnod:
And my WG and boost controller will get reference from a fitting I'll tap into my compressor housing outlet.