no boost from 14b?

[insanedsm2403]

I would like to start by saying that my car ran perfect before doing my turbo exept the howling from the ebay 16g turbo going bad.it still boosted fine and ran like a champ.now I do my turbo swap to a 14b which had minimal up and down play but no in and out.turbo looked fine from the outside.I did a proper blt as I do anytime I touch anything turbo related,and she checked out fine.I go for a ride,and boost came on a little weak for two gears but I figured it was because of the downgrade.first time I'm almost positive I saw 17psi on my autometer boost gauge.then next time I go to floor it I get some boost,and then she just goes flat.it barely touches the 0 on the boost gauge and is slow as balls.I even fell an unusual vibration like when I removed my b/s but a little worse.I did another blt,and unhooked the wastegate acuator line.still nothing.everything is properly in place I have no question about it.that leaves me with the turbo itself.when I inspected the hotside on the 14b it had a slight crack at the wastegate seal but I didn't think it was anything major.does anyone think the hotside is my problem.if so I have perfect a mhi 16g housing to swap in there.any ideas or suggestions will be greatly apprecitated.thanks

 

[91TSIallday]

well since the 16g was semi good with no crack and boosted fine but the 14b has a crack and doesnt boost at all, you might have killed that 14b. What do you have to lose if you changed the hotsides?

 

[insanedsm2403]

Ah man that would suck if I killed another turbo in 20 miles but I have nothing to lose by switching hotside and will be doing it tomorrow probably.just wanted to see if anyone had another suggestion before I go through with this.would anyone think the 14b hotside on evo3 mani could have anything to do with this?also if the hoside was leaking would I hear it through my external dump tube.I purposely went in alleys and made runs and don't hear it dumping any air.also I hold a steady 18-20 hg on idle.

 

[Hubbell91Tsi]

when my hotside was cracked i could still build boost but not until 4500+ rpm.

 

[insanedsm2403]

I did a pull in thrid from 2k to redline and although it took forever I still didn't even get 1psi.

 

[DirtyBirdRacing]

Did you do a boost leak test?

You might have blown a coupler/intercooler pipe/intercooler pipe connection on your 17 psi run, which is why you now have no boost pressure (assuming your boost gauge is hooked up to your intake manifold).

Bill