Amal Valve
u don't 'need' to, it depends how you want to set and control boost.
At the risk of repeating what you already know, the AMAL valve is essentially an electrically controlled bleed valve, connected between the compressor-to-actuator hose and atmosphere. When normally energised it bleeds of a portion of the actuator control pressure to attain the required boost level. The ECU retains control to switch off the valve (and reduce boost) under unfavourable conditions, eg high inlet air temperatures and/or rpm. as a safety feature.
Alternatively you could set boost directly on the actuator adjustment, or uses a manual bleed valve, but in these cases, the ECU would no longer be able to reduce boost.
At the risk of repeating what you already know, the AMAL valve is essentially an electrically controlled bleed valve, connected between the compressor-to-actuator hose and atmosphere. When normally energised it bleeds of a portion of the actuator control pressure to attain the required boost level. The ECU retains control to switch off the valve (and reduce boost) under unfavourable conditions, eg high inlet air temperatures and/or rpm. as a safety feature.
Alternatively you could set boost directly on the actuator adjustment, or uses a manual bleed valve, but in these cases, the ECU would no longer be able to reduce boost.
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