Boost Gauge Installation Question

Hi there,

I have recently purchased a new Defi Boost gauge off a friend, who intented on fitting it to his Mitsubishi Legnum VR-4. He has since decided to break his car, so this was up for grabs.

Now comes the issue I am having, I am not sure of the best place to install the vacuum pipe going to the Boost sensor for the Gauge?

On the old MKIV.COM forum I found a Install Guide, it says to cut the pipe going to the sensor on the intake manifold and inserting the T-peice in between that. Is this still regarded as the best pipe to cut to install the T-peice?

Any help would be great, Thanks

Yeah

Yes Kamal as Scott says that's the sweet spot.

Thanks Matt & Scott, I just needed some confirmation as it was an old write up and I thought maybe someone worked out a better spot for the plumbing of the tpeice.

Thanks again:)

Does it really matter where you take the the feed from?

Mine is plumbed into the pipe leading to the A/C compressor, it was that way since I bought the car.

Just resurrecting this thread.

Has anyone got a clear picture showing where the vacuum pipe for the boost gauge splices in in the engine bay?

there you go bud

edit************ ill go and take a photo of mine for you

they should help

the purple hose is to the boost gauge/controller to read boost

So, the vacuum pipe goes to the same place as it does for a boost controller? That makes life easier as the boost controller will be getting removed, as I dont use it, and have a RR in anyway.

So can I just unplug the boost controller vacuum pipe and replace it with the one for the boost gauge?

if its plumbed into the same place as my diagram above you can mate.

i cut that black pipe and fitted a t-piece in so i can fit the vac pipe to read the boost.

then that purple pipe goes all the way into the car and into the back of my boost gauge. i just tapped into that purple line for my blitz boost controller so the controller can read the boost too.

your boost controller should be plumbed into the turbo side but you should have a vac pipe from your electronic boost controller to that place in the photo by the manifold and throttlebody.

so if thats the case then just unplug it from the boost controller and put it into the gauge

Yeah the vac pipe is manifold side, and the solenoid is all plumbed in to the turbo side.

I'll just plug the boost controller vac pipe to the gauge then saves messing around pushing the vac pipe through again!

yeah mate

Cheers Ash. Great help