Hi guys just wondering how electronic boost controllers work??

CheeRs joe

 

They are just like a bleed valve mate, but instead of you opening or closing the valve to bleed off more or less air, it's done by a solenoid which is controlled by the controller in the car.
Some have a MAP input so they are active, and others do not and simply bleed what you set them to.

 

I have just fitted a new actuator and just wondering which way to turn it to ajust the boost becuse I should be boosting to 15 psi but it's goin up to 19 which way do I turn it? Do I screw it out make the rod longer or screw it in making the rod shorter.

Cheers joe

 

Longer mate for less boost, about 2.5 turns should get you close to where you want.

 

Cheers pal! When I was putting it on it was tight lol thanks for the info cheers

 

They work more like air injectors than a bleed valve

 

I wrote an article on such things once, it should be somewhere in here:

 

but off topic but, now your in the rs turbo room stu could you take a look a post i did on ecu voltages in here i wiil fing it and bump it to the top thanks.

 

Not sure I agree with that really Rick, all EBC's i've seen employ a 3 port solenoid just like our Amal valves, or a bleed valve, air injectors are just that... injectors not solenoids
Although you have a similair level of control with a good EBC (AVC-R for example) as you do with AI.

 

Yes, but how do they bleed?

 

Solenoid opens the valve to atmosphere, injectors directly control the presure that gets to the actuator rather than whats bled off.

 

No, the boost controller has the wastegate normally connected to atmosphere. When the boost reaches the set point, it switches the valve so that the wastegate is now connected to the intake rather than atmosphere so the gate opens.

It is a bleed on system, the wastegate doesn't see any pressure until the controller says so. This is the same as an air injector which when closed doesn't present any pressure to the actuator.

A bleed valve simply continuously diverts some of the pressure away from the actuator, as soon as there is boost there is pressure supplied to the actuator.

Rick

 

Yeah I see your point.... it's a cross between the two as AI doesnt bleed to atmosphere at all.