Originally Posted by SafeChav
the ECU DOESN'T CONTROL the boost, its there as a safe guard! If things get too hot it reduces the boost until things calm down.
The AMAL is fed with an unfused 12v ignition feed, the ecu switches the earth.
Go to your car, turn the ignition on and listen for the amal clicking a few times, its not theory, its fact!
I believe there are chips around that can use the AMAL to control boost though, Stu's Evolution chips i believe are one of them.
i think your having a blonde moment
how can the ecu lower the boost,its mfi we're on about here not efi,the boost is set manually on a mfi car either by jetting the amal valve or running a bleed valve to bleed air off,so how can the ecu lower the boost on an mfi equipped car,it has no vac hoses coming of it except one to inlet,so that just leaves this 12v power supply,how does that lower the boost?im genuinely interested mate,not questioning you just cross reference what i know with what you know
put it another way if i run amal valve and im havin high act's then your sayin that i wont have full boost pressure which i had before hand as its gettin boost held back by ecu and by me fitting a bleed valve im then not going to get boost held back thus risking damage to my engine