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Amal valve - Noticed mine is missing

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Old 07-03-2012, 11:48 PM
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PhilCook
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Default Amal valve - Noticed mine is missing

Can someone just confirm if I actually NEED an amal valve on my RS Turbo?

The vac pipe seems to go from the actuator straight to the turbo. The wire is in the bay for the valve, but the valve isnt there.

Do I really need one? Or should I have a bleed valve in there somewhere?
Old 08-03-2012, 12:37 AM
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Chip
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Without it you will just run wastegate pressure as the ecu will not be able to use it to alter the boost
Old 08-03-2012, 12:46 AM
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a lot of people dont use them. be sure the stub at the metering head is blanked off though. im sure it will be if someone has removed it. the amal ha 3 ports/ actuator/housing and vent to atmospere(stub at metering head). the amal will cut boost if the ecu detects a problem. without it theres no safety cutoff. with appropiate gauges and a feel for whats going on the amal isnt needed imo
Old 08-03-2012, 07:37 AM
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Ok cool. So if I got one and plugged it in on a seitch, I could have a high/low boost set up?
Old 08-03-2012, 09:23 AM
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yes mate. the minimum boost (amal switched off) would be dictated by the actuator. the boost via amal will be whatever its set to bleed (depending on jet). iyts a handy mod if your on the motorway/cruising ect. make sure the fuelling is safe at the higher boost your going to run.
Old 08-03-2012, 10:40 AM
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Awesomesauce.

I will get one purchased off eGay then

PS, anyone got a wiring diagram on how to do this and what relay to use? Thanks

Last edited by PhilCook; 08-03-2012 at 11:01 AM.
Old 08-03-2012, 12:00 PM
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Jim Galbally
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what actuator do you have? standard -31? -34?

what boost do you run?
Old 08-03-2012, 12:17 PM
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Originally Posted by PhilCook
Awesomesauce.

I will get one purchased off eGay then

PS, anyone got a wiring diagram on how to do this and what relay to use? Thanks
I think I have one in my garage from when I had my sapph.
Old 08-03-2012, 12:39 PM
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Jim Galbally
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Old 08-03-2012, 12:52 PM
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PhilCook
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Jim, cheers for that. I assume C goes to turbo, not intercooler? lol

its holding 10psi at the mo, but wanted to get it set up for say.... low: 7psi / high: 15psi
Old 08-03-2012, 01:05 PM
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Jim Galbally
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C = compressor
W= wastegate
R= Return

so yes C = turbo
Old 08-03-2012, 04:22 PM
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I've got a amal valve removed from mine somewhere

Last edited by studabear; 08-03-2012 at 04:22 PM. Reason: spellings
Old 08-03-2012, 04:31 PM
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Jim Galbally
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as per PM:

the ECU pulses is the original feed from the ECU.

the way it works as standard is that the ECU pulses a signal to the valve making it "flap" open and closed really quick.

its up to you if you use a 3way switch or a 2 way switch and what connections you use, the thing is purely mechanical so wont break anything.

just remember when you add the value yuo will INCREASE the boost so you will need to adjust your actuator preload to make sure it's still hitting the same MAX boost.

also is your RST a special spec of any kind with special modifications to the fuel ECU to run loads of boost? if so you dont want to REDUCE the oost pressure.

if its a normal RS turbo with simply a chipped ECU and standard MFI setup it'll be fine
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