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Location:
Adelaide
Registered:
May 2002
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Re: boost spiking problem
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Sun, 22 September 2002 13:02
 
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Im no expert, but i hav done a little reasearch on boost control.
It might be the following
Where is the Boost controller taking its pressure signal from? and also where is the boost guage taking its signal from?
Eg: The Compressor outlet, Manifold etc.
Think about it like this:
The wastegate opens by pressure on the actuator diaphragm. If the actautor is connected straight from the compressor outlet then the diaphragm gets an instantaneous pressure signal and the wastegate may creep open a little letting boost come on relatively gentle.
If the signal is taken anywhere after the compressor housing then the wastegate will stay clamped shut untill the entire area between the outlet and signal origination point. This means that the turbo will build boost as fast as it can because no exhaust is being wasted off.
Now, if the boost guage is taking its pressure signal between the wastegate signal origination point and the compressor outlet the boost guage will recieve a higher signal than the actuator until the pressure is built up in the actuator line. then the wastegate opens and boost pressure drop back to where it should be.
Maybe Im well wrong, but like i said I'm no expert. Take it to your locak trusted performance workshop and see what they think it is.
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| | Subject | Poster | Date |
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boost spiking problem
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mkiii | Sun, 22 September 2002 08:44 |
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Re: boost spiking problem
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Rex_Kelway | Sun, 22 September 2002 13:02 |
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Re: boost spiking problem
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[mikey] | Mon, 23 September 2002 00:42 |
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Re: boost spiking problem
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kassma | Mon, 23 September 2002 04:37 |
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Re: boost spiking problem
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celicamad | Thu, 26 September 2002 00:54 |
