Re: 200 turbo boost ??

[Vytautas Reipa <vytas@erols.com>]

At 06:12 PM 3/26/97 GMT, you wrote:
>  
>> More questions from my accidental, but fortunate acquisition of an 89 200t 
>> (2wd): (standard apologies for not acessing all of the archives first, I'm 
>> scrounging through them...)
>>  
>> Is there an acceptable range for turbo boost?  I don't see any reference to 
>> this in either the Bentley manuals or the owner's manual.
>>  
>> What is the wastegate set for?  
>>  
>> Are these the same for all of these engines (this is an MC, single sensor)?
>
>Most interesting question,Erik.My wifes 200 Turbo 2WD is showing .5 bar 
>positive boost at tickover! Falling to .3 bar positive on a trailing throttle 
>;-)
>
>Something odd here,methinks! If I try to create maximum mid range boost by 
>holding the car around 50 mph against the brakes with WOT,the overboost 
>switch seems to cut in,and the ignition and / or fuel is cut,resulting in 
>kangarooing.On a WOT ,not held against the brakes,the gauge shows 1.7 bar 
>boost,and the overboost switch is not triggered.Given time I will connect up 
>our accurate large scale boost gauge,and see what it is really giving.Mid 
>range performance is very good for a production 2 and a bit litre car of this 
>sort of weight,so I suspect the boost is at least equal to that which the 
>manufacturers intended,whatever that level may turn out to be.

I have the same problem. My 86 5kcst(200 turbo, same thing) is showing .5
bar when I first start the engine!! Fuel cutoff occurs at full throttle when
bar hits 1.4. When I accelerate and then ease of the gas pedal, the bar is
.1. I do not think this is normal. The car lacks the off-line pep of my 87
5k even though the turbo has 30 more horsepower(cars both have autos). The
5kcst goes like hell when it hits 3k rpm, though. Can anyone tell me if the
bar readings are proper and if there's anything I can adjust because I want
a little more response in the 1000-2500 rpm range while maintaining the
wonderful boost that comes in at 3000 and above.