Boost controller help

[Rabbit on Roids]

whatever way it comes off in one piece is the best way. quit waiting around for someone to answer your question, and go tackle the project. vw's are not rocket science. and you never need a pry bar to take anything apart on a VW engine, just so you know. if it doesnt slip right apart, you missed a bolt.

[Syncroincity]

+1 ^^^    Do it. You heard me, do it.

[sprstu]

I think the piece youre having a hard time seeing is this;
on the 'cold side' of your turbo there is a little pipe. That pipe does not put air into your engine, rather, it is used to activate the wastegate. the wastegate has a little pressure sensing diaphragm that opens and closes a little door on the 'hot side' or 'exhaust side' of the turbo. Now, what this is doing is diverting the exhaust around past the 'hot side' fan blades thus tricking the turbo into boosting less. That wastegate door is opened and closed by the little pipe on the 'cold side' of the turbo acording to hyow much boost the turbo is making at the time.

example: (not technically accurate)
Turbo boost= 5psi ----> wastegate opens= 10%  Turbo boost= 20psi ----> wastegate open=90%
All it does is prevent too mush boost for the situation.

SO, when you install a boost regulator what you are doing is putting something in-line between the 'cold side' and the wastegate tricking the wastgate into opening less, or more depending, than is would normally there by giving you MORE boost.Tricking the wastegate into opening less allows more of the exhaust to flow over the 'hot-side' fan (exhaust turbine) causing the whole turbo to make more boost.


makes sense? 

[jettaman8691]

Definitely a BOV on there.  That also means that someone mounted a 1.6TD manifold and the ports don't match up to the head.

Hello Libby; I remember your advice (great) form the Hagar book.  Question; I have a 1.6td intake manifold from an '82 Quantum on my hydraulic head 1.6td from an '89 Jetta.  If I understand you correctly, I need to find a different intake manifold?

[burn_your_money]

The 1.9 intake manifold needs a bit of trimming to make fit with a T3. There is a piece that sticks out that has a threaded hole in it. That needs to be cut off. I don't think it serves any purpose in real life. You don't need to grind away a cutout or anything in the manifold.

On my 1.9NA I am using a 1.6 intake manifold. There is barely enough gasket material to make it seal. Personally I would be worried about it under boost, especially above stock levels.

[brandon5]

Thanks guys sorry if im sounding naggy. Ive just put alot of money into it and when it comes to touching the engine i get scared. Without you guys it wouldn't be running.

Thanks again