Just a quick one for those who may want a little more response from their turbo on the DCi 175 m9r engine. This is the vacuum elbow on the vac pump. Now the internal diameter is extremely small. you can drill this out to around 2.4mm. I used a 2mm bit and gave it a wiggle, cleaned any plastic swarf and fit. I can tell a difference straight away as the turbo has started coming in a few hundred rpm sooner just from this. Now be very careful removing this from the vac pump as its got a non return under it and it will pop out if not careful. its sprung so take it slowly and you will be fine. CJ
