my current setup is as follows.

forge WGA (arm so lose that the wastegate leaks at idle)
AMS MBC (turned all the way down, for lowest boost possible)
Xtremeboost downpipe with External Dump wastegate.

my problem, cant hold below 25psi at WOT. (which causes a code)

I think i just need to lose the FORGE WGA, and the MBC works fine.

When i was running the stock WGA, i was able to hold a solid 22psi all the way to redline, all from the External dump wastegate downpipe.

Im sure i answered my own question, the FORGE needs to go, but what do you think?

 

Maybe wrong forum...

 

yea wrong forum, but

first you need to put proper wastegate pressure on ur wga,,

I would say for your mods a wga is not something you need at this point.

 

Double check ALL your vac lines going to the wastegate. I had a nasty tear in mine near the intake manifold, and I lost complete control over boost.

 

Yeah, Fastazz is right. Go back to the stock WGA. Set WG preload to up around 17 PSI. Double check all boost/vacuum connections and proper MBC routing(per broddey).

 

humm, how the hell did i get into evo -9 forums? haha, damn, but i will do that, and see what i can find. Thanks for real answers.

 

It's O.K. we don't shoot interlopers on the first incident. We all ride for the same brand.

 

i do find that when i post in the X forums, everyone is like, "its gotta be your MBC, thats teh only answer" haha. because 99% of them are newbs. this is just the only time i had an issue like this when running atmo wastegate. but hopefully its vaccumm.

 

i don't see y u changed the stock wga. but other than that what was already advised to u i think is the correct thing to do.

 

because the stock wastegate sucks at regulating/holding boost.

i figured it out, vaccum leak. fixed that, and the MBC was bad all of a sudden. it wouldnt regulate boost. totally random. it was working fine a week ago. weird.