e-boost is like $570US. Too rich for my blood, but I still haven't decided how i'm going to control boost.

 

Lets hope whatever you decide on is accurate and reliable enough to handle the chore or you'll be looking for a lot more than that.

 

You can build a dual stage or multi-variable stage MBC for $30. Its not pretty, but it works.

 

I'm making a dual stage MBC right now. All you need is a 3 way solenoid, which you can get off any RX7 engine, 2 ball and spring pressure relief valves, a Tee, and a switch to turn on solenoid. We're not talking rocket science here guys. Like Scathcart said
"You can build a dual stage or multi-variable stage MBC for $30. Its not pretty, but it works."

 

Spent $27.00 not including tee fittings or hose. High temp air regulator and a high temp solenoid I got for $12.00. I was lucky it listed for $110.

 

EXactly. I was going to past a schematic once I finished "painting" it, but I guess there's no need.