I've been thinking for quite some time now that I'd like the ability to switch between two boost settings ie 1.2 bar (low setting, which the ECU is meant to run at) and maybe 1.4 bar (high setting). The thought of shelling out hundreds of pounds on an EBC which I don't really need doesn't appeal.
That being said I'm now kinda limiting myself to running an MBC of some sort. I currently have a Dawes device fitted, running 1.2 bar and it works faultlessly. It holds boost well up to red line, doesn't spike at all but isn't 'switchable' as I'd like.
I started having a look in earnest at options but the dual stage MBC's are all essentially bleed valves that are switched by means of a solenoid...which got me looking for something else.
I've now stumbled upon an idea which sounds like it would tick the box and wouldn't cost a fortune. (see piccy below)
Essentially you run a 3 way pneumatic solenoid valve which has TWO Dawes devices attached to it, which are in turn tee'd together and connected to the wastegate actuator. The beauty of this setup (if it works!) is that it uses two Dawes devices to hold two different presets of boost, unlike a lot of them which limits the boost to either wastegate spring pressure+high boost.
The other slight advantage of this setup is that high/low boost control would be simply by means of a toggle/rocker switch somewhere in the cabin to feed +12V to the solenoid...nice and simple!
So the question is, would this actually work? I can't think of any reason it wouldn't but then again I'm certainly no expert!
Any thoughts or opinions guys?
cheers for now