What does this hose do? Boost loss

[scott.john.mockry@bangate1.tek.com]

Shef,

The loss of 0.1 bar of boost with the WG hose connected is normal considering the 
type of boost mod you are running, with the WG solenoid connected and the stock 
boost maps in the  computer. The computer does not need to raise the boost with the
stiffer WG spring and just turns off the WG solenoid (0% duty cycle) . With the solenoid
turned off the WG upper chamber is connected to the inlet side of the turbo which
at sustained full throttle is slightly below atmospheric pressure (ie a slight vacuum).
This slight vacuum applied to the upper WG chamber reduces the boost about 0.1 bar
at sustained full throttle running as the RPM  increases. Changing the actual boost
maps allows you to get back that 0.1 to 0.2 bar pressure initially when you nail
the throttle (overboost for about 1 second) and then begins to reduce the boost
as the RPM's increase to reduce the possibility of detonation at the higher RPM levels.
 If you disconnect the WG hose all together you will get back your 0.1 bar and
see your boost climb slightly as the RPM increases. I would leave the WG hose 
connected until the ECU mods are available from one of us hackers. Orin up in the 
Pacific NW located the actual boost maps a few weeks ago. The system works 
great on my 89 200TQ car with the new  higher boost maps!

HTH
Scott M.
 
Shef said:
        >Thanx for the comeback on that. The only real mod. I'm running so far
>is the Charlie spring and shim, which used to give me about 1.8 bar on the
>computer display. I seem to have lost .1 bar hooking that hose back up. As soon
>as the developers in the group finalize their ECU mods. and maps I'll add that
>also and hopefully have you work your magic on my trusty ol' K26.
>Thanx again,
>Shef