BCS Restrictor Removal

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BCS Restrictor Removal

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Mitsubishi >> Mitsubishi Models >> Mitsubishi Eclipse & Eclipse Spyder >> Eclipse Frequently Asked Question Section >> BCS Restrictor Removal

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BCS Restrictor Removal - 3/20/2008 9:57:30 AM

TheEngineer

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**ALL INFORMATION WAS TAKEN FROM vfaq.com**

This is a free mod to do on stock 1g/2g Eclipse GST/GSX that will gain you typically from 1-2psi more boost. The Boost Control Solenoid (BCS) is was controls the stock boost on any 1g/2g dsm. This prevents the car from running strictly off of the wastegate spring. Within the BCS is a small restrictor which restricts mroe air from flowing, thus reducing the boost. This write-up shows how this small peice is removed:

Here you can see the location of the BCS with the intake pipe removed circled in green

Here is a closeup of the BCS

1. Remove the BCS from the vacuum lines

In these 2 pictures you can see the fitting in which the restrictor is located again circled in green

2. Now once you have the BCS out take a screw that can tighten inside the fitting and screw it slowely into the restrictor slightly then pull on it to remove it from the fitting.

Here is a picture of the fitting with the restrictor removed