wastegate hoses--type 44

[Ameer Antar]

Thanks Nate and Phil for clearing things up.

>If the upper one is disconnected, it varies by model.  MAC-11 and later
>cars will lose ECU control of boost - the main symptom is increased
>turbo lag because the ECU cannot achieve its deliberate short-term
>overboost.  On earlier cars (without a wastegate frequency valve)
>there's almost no effect.

that's what I don't get on my KH type engine. From the vac. layout diagram, 
the solenoid seems to switch the upper hose from a line going to a 
pre-turbo hose [always vacuum], and the other hose goes to the manifold 
thru a back pressure valve. I don't get how the MAC 07 ECU controls boost 
if in fact the wg spring is only rated at 1.2-1.3 bar. The mappings in the 
ECU, according to SJM, are for 1.4 bar. How does the earlier ECU regulate 
this? Does it regulate it just like a freq. valve by turning on and off or 
what? Thanks again for any info.

-ameer