1998 V70 Turbo Bypass Valve Blank reversal Topic is solved

[Callum]

G'day everyone, this is my first post .

I recently bought a 1998 V70 2.5t that is in really good condition even for its age and km's (266,xxx). I was having a poke around in the engine bay today and noticed that some numpty had installed a turbo bypass valve blanking plate without adding an external wastegate.

I want to put a bypass valve back in it obviously, so I was wondering if someone could point me in the right direction RE finding a new bypass valve cover and where the vacuum line that connects to the bypass valve starts near the intake (there aren't any long dangly bits of vacuum hose that make it obvious).

Thanks in advance.

[abscate]

G,day Callum.

The vacuum can be pulled from any port on the vacuum tree near the throttle body. You can pull one of the rubber caps off to open up a ‘ branch’ on the tree

That’s a pretty bad modification. You need the vacuum to pull off the boost when you lift your foot quickly. How does it drive?

[Callum]

Heya, abscate thanks for the response that helps a bunch. Yeah, it is a pretty dodgy modification, not necessarily a damaging one though.

As for how it drives, i'd say that it drives fine still comes on boost where it should etc. Only thing that I would say is that boost needs to build for a bit longer than it would normally(?) after a gear change because the compressor is probably stalling (I'd say thats why the person removed it in the first place to try and get the "sututututu" noise...). it being a LPT probably means that any potential negative effects are less pronounced.

I see that you can get a new housing and valve setup from fleebay for AUD$60 so I'll probably go for that.