Re: 200TQ - no overboost

[charlie@elektro.cmhnet.org (Charlie Smith)]

Earlier, Phil Payne wrote:
> 
   [ deleted the discussion of what's right ]
> 
> Just about every component (including the turbo) is original.  140k
> miles.
> 
> However - flooring the accelerator at 35mph in third delivers only a
> _slow_ boost accumulation, eventually reaching around 8psi.  The climb
> is the most gradual I have seen on any MC/MB engine.  No overboost at
> all.

You didn't say anything about funny noises, but my guess would be an 
air leak in the pressurized part of the intake system ... like an end 
seal for the intercooler or an intake hose.  It would have to be 
something that's mostly sealed under suction but that opens up under 
pressure.  Do you get a sharp whistle noise when you quickly snap the 
throttle shut?

The other possibility is something wrong with the turbo - like damage 
to the turbine impeller blades ...

    - Charlie

Charlie Smith   charlie@elektro.cmhnet.org  614-471-1418  
Columbus, Ohio USA


 4 wheeled fleet:	                     2 wheeled fleet:
_________________________                  _________________________
86 5kCSTQ                   12PSI          95 BMW K1100-LT   1,100cc
98 Dodge Ram                               95 BMW R100-RT    1,000cc
    w/ Cummins Turbo Diesel 18PSI
69 Porsche 911S   3,200cc                  62 BMW R27          250cc