If you wish to lower boost level, you must run a lighter wastegate actuator spring. Regardless of brand or type, a boost controller will only allow you to raise boost above the installed wastegate spring pressure.
Our MBC allows you to adjust your PSI whenever the mood suits and has a very smooth adjustment so you can make accurate increments as small as half pound (.5 PSI) easily.Ģ50 step adjustment wheel allows easy, accurate hand adjustment, but will not loosen under high heat or harsh vibration when pressure is set.Īllowing from +0-60psi without having to switch springs, there is no more swapping out soft and stiff springs for higher or lower boost levels. Look at it this way: an excess of 1 or 2PSI could be the difference between a killer ride and a killed motor.
This boost controller is everything you need to get the most out of your turbo BMW without emptying your pockets and with select features that we find make it one of the best manual boost controllers period for a turbo BMW, or any turbocharged project.Ĭhances are, your BMW didn't come turbocharged, so we have taken extra steps to insure we chose a MBC that is super accurate with a special valve design that eliminates boost spikes caused by slow valve designs. Over the years we have installed many types and brands of Boost Controller. There are lots of boost controllers out there they range in price from dirt cheap to wildly expensive.