not building boost, am i missing something? Options

[easternpiro1]

Hi all, was wondering if i can get some feedback on something i was missing. here's the story:

recently a friend and I fixed a leak due to stripped thread in the head causing a leak between the exhaust manifold and block.

after rethreading and putting everything back togehter leak is gone BUT now im seeing much lower boost numbers after taking it for a drive.

I own an AEM tru boost controler/gauge and the boost is currently set to stock wastegate pressure (8psi) and consistently held this pressure PRIOR to fixing the exhaust leak.

as of today, my first drive out, my car would not pull past 5psi and touched 6psi BRIEFLY. I double checked my IC piping and adjusted and retightened.

when i went back out the car would only boost up to 4-5 psi adn sometimes as low as 2-3 max.



Im pretty sure its a leak somewhere but it can only be one place as the only IC piping that was removed was the piping coming from the turbo (charge side) i have checked and double checked it.

is there something im missing? any helpful hints would be appreciated! thanks!

[batcavee00]

hey man, if you checked you wastegate and turbo and its working properly. them im almost 100% sure you got a leak somewhere. i was having trouble boosting a while back and i also tested for leaks and although i couldnt hear any i moved my hand around couplings and pipes and i felt a strong current of air coming from my BOV. and sure enough the o-ring connecting the bov to the bov flange wasnt sealing right. i bought a thicker o-ring and added silicone all around...


and... shhhhassssam! im boosting normally.....

i too was hearing a loud noise when i was spooling, but i didnt think it was a leak,...instead i was like: " man, this turbo spools loud..." lol
and now that the leak is gone, my spooling is not as loud as before with the leak

forgot to mention, i also tightened the arm on the internal wastegate a few more turns cause it was just snug..now its a bit tighter, to ensure a proper seal




i hope this helps........

This post has been edited by batcavee00: Jun 20, 2012 - 4:19 PM