This electronic boost control solenoid can be used with the MS3-Pro/MSPNP as well as any DIY Style MegaSquirt EMS (with the appropriate mods), or with other electronic boost controllers to control boost by adjusting the pressure to a turbo wastegate. The MS3-Pro, MS3X, MSPNP, and DIYPNP can drive this directly. It operates on a frequency of 19.5-40 Hz and is practically a wire-in replacement for the now-discontinued GM EBC Solenoid. It usually needs a slightly lower duty cycle than the GM valve; if you’re replacing a GM valve, we recommend cutting back your duty cycles by 30% and then carefully testing and adjusting as needed. This kit includes 1/8″ barb fittings and mounting hardware.
Maximum pressure is 125 psi, so this can be used even on wild high pressure compound turbo setups.
Current 3 port MAC valve solenoid plumbing from last 2018 - present
Previous solenoid plumbing up until late 2018.
Do not plug the disconnected port. Leave it vented to the atmosphere.
The above diagram shows the way the solenoid is plumbed up for both 1-port wastegates (such as most internal designs) and for 2-port wastegates (such as the ones made by Tial). Both plumbing methods are set up so that energizing the solenoid will increase boost. This is a fail-safe so that if the valve loses power, boost will drop to its minimum set pressure.
One wire connects to a 12 volt source, the other to the Megasquirt, the valve wiring is not polarized so it does not matter which wire you run to 12v+ and which to switched ground at the EMS. It is NOT recommended to mount the valve in a direct, extreme heat source so, if you can, mount it off to the side of your engine bay keeping maximum valve temps at or under 122*F.
The wastegate ports are 1/8″ NPT pipe thread if you wish to use alternate connections.