I just installed a Dawes Device bc and a hope depot needle valve for prespool and I cant get my boost controlled, at all. I backed the nut out all the way, and then blew through the controller with no restriction. I took the car out for a test drive and I am still boosting reaching 13+ psi. What's going on?

 

Also, the needle valve is opened 1/8 turn and the hoses are connected correctly.

 

Bite the bullet and get an electronic boost controller.

Much easier to control, and you know exactly what you're setting. Not 1/8 or 1/2 turn this way to increase x psi...

 

You may need to port the wastgate.

 

the person i bought it from has the exact same mods but did not have a problem with overboosting.


and as for the ebc, I would like to see if I can control boost this way first.

 

Could it be possible that the needle valve isnt opened enough, causing no boost to be diverted to precontrol? Im gonna go try opening it more.

 

I assumed you tried that already.

 

I had it turned a 1/4 turn when I read that 1/8 turn should be used to start, but yeah I still needed to turn it more. I went ahead and adjusted it to 1/2 turn and BAM 10-8-10 solid on the first try. Bumped up the boost on the Dawes a little and now I'm at 11-9-11 with transition compltely normal. Thanks for the help guys I can finally boost again