vacuum line for boost gauge help please

[dvs-b4]

hi all im new here and was woundering if any 1 could help me?

its a 2003 legacy b4

my problem is iv got a boost gauge and am not shore where to put the t intersection for the vacuum line. iv thaught of puting it on the bov line but theres all ready a t there for the waste gate. iv tryed unpluging the waste gate signal hose nd runing the boost gauge of it but it idels real rough when its not on. the pipe isnt realy long enough for a nother t and was woundering if any 1 new another place to run it from.

thanks in advance

andrew

[dubbedup]

id take it off the bov line,

[dvs-b4]

will it interfear with anything?

would it be allright to extend the line so i have enough room for the t

[dubbedup]

nah, it will be sweet - just extend the line,

[dvs-b4]

sweet thanks for that ill let you know how it goes

[dubbedup]

im thinking if this is twin turbo, you will be only able to modify the primary bov line.....someone will need to confirm this as i have only worked on singe turbs

[dvs-b4]

yea its twin turbo its only got 1 bov that i know of its straight of the top mount intercooler ill try upload a pick bt its proven harder than i thaught

[dubbedup]

theres a thread on here about how to load pics

[dvs-b4]

hope this works

[DRFVDR]

is it just boost or does it measure vacuum as well

if it is a combined gauge then u will need to tap into one of the lines on the intake manifold after the throttle butterfly(other wise u wont see vacuum)

I prefer to take mine from here anyway as u get a real sense as to what boost then engine is seeing and when

[dvs-b4]

it does both boost and vacuum. it worked ok and read both boost and vacuum off where the wastegate was bt didnt hold at max even with my foot still on the gas it peaked nd droped back to 0 so idk it may have been leaking. there are only 3 pipes comeing off the throttle 1 goes towords thr fire wall 1 turns and comes toward the front and the other is the bov

[REDREX]

Take it from the fuel pressure reg vacuum line.

[dvs-b4]

i put a new peace of pipe in and teed it off there it reads of 15 vacuum is that ok? it read 20 when the waste gate was unplumed!

1 more thing is it ment to drop back to 0psi when the second turbo kicks in?