Originally Posted by brandon
enginebuilder what the hell are you talking about, if he has it set at say 12psi with the stock bov and changes over to a different one that is capable of handling more boost without leaking why would he need to reset the boost? I think i'm misunderstanding what you're saying.
I'll be nice, since I'm new to this forum, and you don't know me yet. Suffice it to say that I have ALOT of experience with DSM's, and I really do know what I'm talking about.. (state certified mechanic, 12 yrs exp. yada yada yada)
Assume that he was running 16lbs of boost with his stock BOV. Assume further that his stock BOV was leaking ~3psi boost pressure at >12PSI. This would force him to make his turbo run @19lbs of boost, even though only 16psi was being registered at the intake manifold. As soon as he changed BOV's, his boost would be running at 19psi. The stock fuel system on this car can only handle about 16-17psi before it hits fuel cut. Thus the requirement for altering his MBC settings.
-EngineBuilder
edit: I do not disagree that there is the possibility that his BOV is opening before it should; however this would feel more like a gradual loss of power at higher RPM's; from the statement:
the motor seems to cut off fuel. its like when a top speed governor kicks in.
I believe that he is hitting fuel cut- the only reasonable explanation for this is that he is producing more boost than his fuel system can handle. Not that he is losing boost through a prematurely opening BOV.
Takers on the $10 bet?