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Brass Restrictor in pipe to actuator????

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Old 25 May 2007, 02:00 PM
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Damocell
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Default Brass Restrictor in pipe to actuator????

What does the brass restrictor in the pipe to the actuator on the VF28 do?

Would a lack of this restrictor cause the turbo to produce less boost at high revs?

Damo
Old 25 May 2007, 03:37 PM
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AndrewC
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In layman's terms it limits the amount of air sent to the actuator to allow higher boost pressures to be run.

It is an essential part of the boost control mechanism, without it the boost control solenoid can't bleed off enough air to make the desired boost.

Andrew...
Old 25 May 2007, 03:49 PM
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Damocell
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Does this mean it would loose boost at high revs without it?

Damo
Old 25 May 2007, 03:58 PM
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MartynJ
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It would mean it would be down on boost all the way through the rev range...
Old 25 May 2007, 05:36 PM
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Damocell
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My car is mapped to run 1.4bar in the midrange but then it tails off to 0.8bar at teh red line, so the boost is leaking from somewhere.

Could this be the problem?

It has been on the rollers and it isn't the mapping, it just won't hold boost above 5000rpm

Damo
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