Boost limited to 6psi?

[DarinS]

Hey all, I recently had my 345iC dyno tuned (E30 with M30B35 and M106 turbo setup) and it wouldn't hold more than 6psi, no matter how we configured the MS EBC. I have the vacuum/boost line running from the stock wastegate boost port to the EBC, and from there to the intake manifold. I've found 1 or 2 loose connections but ultimately the boost would not go more than 6psi. I remember an old site I can't find anymore (745i.net? something like that) that had lots of tutorials on how to tune these, but haven't been able to find it. The dyno guys suggested that the wastegate spring may have collapsed, though I haven't heard of that before. Just looking for some ideas/experience on how to raise the boost pressure on M106 systems. Ideas?

[Hit Man X]

Motronic WG disconnected will allow about 10psi. I am not hip enough with MS to help with the EBC setup, it may just be a duty cycle issue or a poor quality solenoid. They usually have three tits. One open or put to a filtered air source, one pressure source, one output to the WG.

My WG allows whatever...you should buy one.

[DarinS]

I've double-checked the solenoid and it's all plumbed correctly. And we tried lots of different duty cycles and Hz for the solenoid, no change. If I weren't selling the car soon I'd definitely pick up a Tial conversion, but I'll leave that to the next owner

[yert315]

Are you running m106 electronics or megasquirt with the m1.3 harness?

[DarinS]

Megasquirt with m1.3 harness

[yert315]

Have you tried running with the wastegate line unhooked? As Hitman said, it should produce 10psi on its own