ballin

iTrader: (1)

i know this is a newbie question, but I just can't get my head around how the standard ke boost control works!!

I'll write what i know and if people could correct me etc. it would be MASSIVELY appreciated cos its doing my head in

Ok.....

The boost pressure is set by actuator rod length.

If temps. get too hot then the ecu will send a signal to the amal valve, which opens up one of the ports and in turn sends pressurised air from the turbo into the top of the actuator; forcing the spring down and therefore opening the wastegate further (reducing boost).

The amal valve has 3 ports?
- compressor housing > amal
- amal > actuator
- amal > plenum chamber (???!)

If i understand correctly, under normal circumstances the compressed air going to the amal valve just goes through the valve and back into the plenum chamber? However when boost limiting, that route closes and instead the actuator one opens to dump boost?

That's how I understand it at the moment? Is that right?

Rest assured once i've got this bit sorted theres more to come lol

cheers in advance!

NEO™®©

erm not really the amal valve acts like an electronic bleed valve.... the actuator pressure is set low and the amal valve bleeds the air off to make the actuator open at a higher boost pressure when the amal valve cuts the boost it send all the air direct to the actuator to make it open at its lower preset pressure

Stu @ M Developments

iTrader: (12)

Totally wrong.
The boost pressure travels through the C port and out of the W port.

Under normal conditions the ecu turns on teh amal valve, giving it a controlled airleak through the R port, just like a bleed valve.

If certain conditions are met, the R port can be turned off leaving no air leak and thus lowering the boost.

Very simple system indeed.

ballin

iTrader: (1)

damn thought i was gonna be at least slightly close

thanks for the replies, if i could ask where those 3 ports go i might understand it better Stu?

C Port = turbo > amal
W Port = amal > actuator?
R Port = amal > ?

thanks sorry for dumbness

Stu @ M Developments

iTrader: (12)

C = Compressor

W = Wastegate

R = Return to airbox.

And the valve is actually labelled exactly like that if you look

ballin

iTrader: (1)

mines been taken off hence the questions

but thankyou

Stu @ M Developments

iTrader: (12)

Your Welcome.