turbo problems...

Post Tue May 12, 2009 7:22 pm

hi, does anyone no were the vacume hose on the actuator goes to if your doing a turbo conversion.
its one of those turbos with built in recirc dump valves

Post Tue May 12, 2009 7:37 pm

If you mean a waste gate then there’s usually a nipple on the compressor housing which is joined by a small piece of pipe.

Post Tue May 12, 2009 7:44 pm

mine hasnt got one, compared it to the one on my rst. how would you make it work

Post Tue May 12, 2009 7:49 pm

It's just to let it know how much boost pressure it is putting out so I would think the feed could be taken from anywhere in the pressurised inlet system, maybe even a T piece in the pipe for the fuel pressure regulator?

It is there to open the wastegate when the turbo is produceing it's pre-set boost pressure by venting some exhaust gas around the exhaust turbine rather than through it.

Post Tue May 12, 2009 7:52 pm

ok cheers, so would that be the same for boost gauge and dump valve fitting

Post Tue May 12, 2009 8:01 pm

I think it will be, theres folk on here who know a lot more than me though

Post Tue May 12, 2009 9:05 pm

You need to feed the wastegate & BOV a vacuum feed for them both too work, you can take the wastegate feed from the comp housing but you'll get a quicker reacting WG as the comp housing is first to show boost, if you take the feed from after the TB you'll get more boost as it takes longer for it too build up as there is always pressure drops through pipework and IC.

Try and get them all from the same source as it will mean they all see the same pressure but try not to 'T' them off one source, a few tapped into the inlet mani would do fine.

No feed to an internally gated turbo means unlimited boost = bang.