HX COMPRESSOR HOUSINGS FEATURE M.W.E.

MWE - Map Width Enhancement grooves

Basically all compressor housings used for our Cabo Turbo HX program are equipped with a so called ‘MWE groove’.

This is an air bleed slot, machined into the central inner compressor inlet of the compressor housing around the impeller, creating an additional outer air inlet around the basic one. It helps to improve the surge margin by re-circulating the reverse flow through the air slot around the impeller back into the central front of the impeller inlet when surge is imminent.

The MWE slot also helps improve the choke side of the map by allowing additional air into the compressor past the outer throat area of the impeller. These grooves allow extra air to be pulled and fed directly into the second set of blades on the compressor wheel outside of the main central inlet.

This most notably increases useable efficiency range of the compressor as well as overall air flow, hence the name, ‘Map Width Enhancement’ grooves: it produces a wider / broader efficiency range of the compressor map, which is particularly important at lower engine Rpm.

It allows a larger compressor to be used for higher flow requirements without risking running the compressor into a dangerous surge condition.