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Old Jun 14, 2008 | 09:07 PM
  #1  
marklemac's Avatar
marklemac
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From: Southampton*** MY02 STi, Black/Blue Mica Prodrive Style, mildly modded :) :). ***
Default Actuator question

Hi,

Assuming the following.

Actuator is connected to the compressor.

Let's say the actuator is rated to 1.2 bar.

When you run the car and push the loud pedal, would the max boost you see only be 1.2 bar. This is the limit of the actuator yes ?

If you achieved less boost, say 1 bar, would that indicate a problem with the actuator ?

Equally, if you saw more than 1.2 bar, (say 1.4bar) would the actuator be faulty ?
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Old Jun 14, 2008 | 09:18 PM
  #2  
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johnnyroper
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From: at the petrol station again!!!
Default

Originally Posted by marklemac
Hi,

Assuming the following.

Actuator is connected to the compressor.

Let's say the actuator is rated to 1.2 bar.

When you run the car and push the loud pedal, would the max boost you see only be 1.2 bar. This is the limit of the actuator yes ?

If you achieved less boost, say 1 bar, would that indicate a problem with the actuator ?

Equally, if you saw more than 1.2 bar, (say 1.4bar) would the actuator be faulty ?

so long as actuator is directly plumbed to compressor housing and it is 1.2bar then you should see 1.2 boost pressure.
if it was higher then it could be a faulty actuator or a split in the pipe.
less boost could be actuator fault or a boost leak somewhere
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Old Jun 15, 2008 | 01:59 PM
  #3  
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swisstonihasher
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From: South West
Default

Originally Posted by marklemac
Hi,

Assuming the following.

Actuator is connected to the compressor.

Let's say the actuator is rated to 1.2 bar.

When you run the car and push the loud pedal, would the max boost you see only be 1.2 bar. This is the limit of the actuator yes ?

If you achieved less boost, say 1 bar, would that indicate a problem with the actuator ?

Equally, if you saw more than 1.2 bar, (say 1.4bar) would the actuator be faulty ?
I've got 1.2 bar actuator fitted and she just starts to crack open after 1 bar, just slightly...It will hold 1.2 bar without any sort of boost controller.
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Old Jun 15, 2008 | 03:19 PM
  #4  
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Varboy
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From: Hampshire
Default

You could quite happily see greater than 1.2 bar, if your wastegate isn't flowing enough excess exhaust gas.
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