[FAQ?] What's an AMAL valve and what does it do?

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[FAQ?] What's an AMAL valve and what does it do?

Postby maysaXr2i on Sun Aug 08, 2004 9:39 am

What exactly does this do, cos ppl say you can use it but you dont have to???
where would i find it to see if i still have one???

also what is meant by an IAT sensor???

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Postby AdrianFRST on Sun Aug 08, 2004 10:36 am

The amal valve is basically a boost controller.

Rather than the compressor housing being piped directly to the actuator, it goes from the turbo to the amal valve then to the actuator.

The amal valve bleeds off boost above the preset level and vents it back into the airbox. Its purpose is to allow boost to build up to a pre-set level overriding the overboost protection, then revert back when a certain load demand is reached.

It's failsafe in that it require power to operate so if it fails, the boost level will default back to what the actuator is set too - a safe amount (6psi or so as standard).

You can leave it off without any problems, so long as you make sure the car is set up properly.


IAT is inlet air temp, used to determine when to retard the ignition to prevent detonation.
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Postby maysaXr2i on Sun Aug 08, 2004 11:14 am

The amal valve bleeds off boost above the preset level and vents it back into the airbox.


so this would be removed when fitting an induction kit???

IAT is inlet air temp, used to determine when to retard the ignition to prevent detonation


where is this located???
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Postby Spanthefestaman on Sun Nov 14, 2004 10:34 pm

Can i use an Escort / cozzie one on a fiesta? as im struggling to get a second hand fiesta.

What are the faults that can occur when it gors wrong. Can it over boost?
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