Rule out the engine and do a compression test. Even with a small valve seat leak you should see 1 bar WAY sooner than where you are at. You should rethink those cooling lines and your air filter position while you're at it.

do you have the steel ring at the bottom of the wastegate piston?

Yeup yeup. Checked that last night when I took the wastegate off in the dark.

I did tighten the wastegate down extra tight this time, and I seem to have boost a little sooner now. It still doesn't hit like I feel it should. I did fix the wastegate solenoid problem opening up too soon also. Still there is no way I could possibly see 10 psi before 4k.

I will get a log and post it up and look for more problems. :/

excuse my limited knowledge of the Haltech...

On the Haltech with an external wastegate, does more displayed wastegate duty cycle always mean less boost? is there a dipswitch to set it from internal to external wastegate? Or does the Haltech normalize the "duty" display for internal and external wastegate configurations so that more % always equals more boost?

On the Profec etc boost controllers, you have to configure the boost control solenoid for NO (normally open, internal wastegate) or NC (normally closed, external wastegate). With an NO/internal wastegate configuration, more duty closes the solenoid, which opens the wastegate arm to reduce boost. With an NC/external wastegate configuration, more duty opens the solenoid, which supplies air to the top of the wastegate to push on the spring and increase boost.

The boost controllers are set up in such a way that the user does not need to understand the distinction however.

no problem no problem. .. I .... am trying to figure that out right now actually.... haha from what I can tell... you are right. The duty cycle seems to be backwards on the logs.... I just raised up the start duty cycle to 50% instead of 10 or 15% and I think it is actually opening less, instead of going strait to 90%/85% open. :/

I am doing more testing as we speak haha.


Start duty cycle::
"This is the duty cycle that the waste gate will go
to when closed loop boost control begins. This
duty cycle should cause the boost to read
somewhere below the target boost level. If this
value is too high then the boost will overshoot
the target boost level before it returns to the
target. If too low the boost may dip down a bit
before being controlled.

Yeah I'm pretty sure you are right now. :/ args. This has been a wonderful trip. At least I will be able to write a full walk through for people after this. :D

I don't have a Haltech on my car, but I do have Halwin v 1.71 . Have you considered going into options --> auxilary outputs --> PWM output 3 (or whatever is your boost control output) --> edit --> inverted output ? If you read through the help file under "turbo wastegate map" it says to increase duty cycle to increase boost, and the diagrams in there are all for an internal wastegate. That implies to me that the default configuration in the Haltech is a normally open--what would be "NO" on the Profec etc solenoid--configuration. That isn't going to work for an external wastegate.

I think if you set the output to inverted, it would function correctly for an externall wastegate. More duty would equal more boost. But somebody else who knows Haltechs can chime in and tell me if I'm off base or not. And you need to turn off the closed loop target boost for now. Like any closed loop system, it works better if it's mostly dialed in already in open loop first.