Not feeling the BOOST!

[jaywood]

How much throttle are you giving it? What rpm?

[BMWZ318is]

all the charge pipes are tight.

[BMWZ318is]

almost full throttle i had it up to 6000 a few times trying to get boost

[Mr. Burns]

all the charge pipes are tight.

take a pic of your setup...theres gotta something not right.

what manifold you using?

upper or lower mount?

[jaywood]

Did you put the turbo on backwards?

[Mr. Burns]

Did you put the turbo on backwards?

I didn't want to suggest that....but...

did you?

[BMWZ318is]

im using the cx racing top mount turbo mani. lol no im sure i didnt put it on backwards this is the third time ive taken it apart. Yah ill take a pick and post it up

[2quikmotorwerks]

What kind of turbo is it? What turbine housing is on it is it external wastegate or internal?

[nando]

actually, boost leaks could make a lot of sense. maybe BOV installed wrong.

have you pressure tested the intake?

[Jaxx_]

blow off valves can release pressure even when manifold pressure is in vac. I could hear my SSQV with as little as 10in/hg of "boost."

That said, this sounds like a janky setup to troubleshoot, you don't even know if you're making boost. First place I would start outside of a boost leak is the wastegate, my bet is that it's stuck open or something.

[kamotors]

ummm. definitely a boost leak or the turbo is siezed.. can you hear it whistle if you rev it up? try to look in the the turbo inlet while revving to see if its even spinning. When I had a charge pipe off this weekend the car obviously ran but would not make positive pressure double check ALL clamps couplers and the IC, Maybe a couple is torn.

[ak-]

Okay, first of all stop driving your car trying to go in boost.
Fix your boost gauge to see what the hell is going on.

For all we know, you could be boosting 25psi right now(broken wastegate as mentioned), leaning out terribly, not be knowing it(no power will be made), and boost spike your motor to destruction. This is my guess because you say that you do in fact HEAR your BOV go off.

If it IS just a boost leak, I'm not sure how your car would idle properly to begin with unless it's kind of small.

[blueapplesoda]

Did you install the turbo manifold right? The CX manifolds need some elbow grease to get them to seal properly. I've had a buddy put one on and he made 1psi only, but that was because the exhaust mani wasn't seated to the head. You would hear a leak, unless your open dump was so loud covering up the fact that your manifold is leaking (check the turbo and check the exhaust to head flange) which was also his problem. He drove the car to me from San Diego and it totally cooked the exhaust mani gasket.

Check the turbo to see if it spins. Sometimes, if you loosen up the comp housing to rotate it to the right angle, it doesn't get tightened down properly binding the compressor wheel or something to that matter.

Check your wastegate to see if you have routed correctly.

Check your BOV

Pressure test everything.

[BMWZ318is]

its an external tial 38mm wastegate and a tial 50mm bov there both installed right its a t3/t4 turbo 60 trim the turbo isnt seized and there is no shaft play in it at all im using a turbosmart boost controller heres some pics

[BMWZ318is]

IMG116 by ZacE30, on Flickr