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Originally Posted by W140 S600
In stead of running a seperate line with a filter to atmospheric pressure, one could be plumbed from the egr valve to the intake ducting right after the intercooler.
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As stated above, there is no pressure differential, so this wouldn't work. However, if you tap in
before the intercooler, the pressure is higher there so it might have a chance of working. But it would be an awfully long run - diagonally across the engine bay.
To answer some questions above, the EGR is most open at part throttle. The engine is boosted (or overboosted in aviation terms) at that time. Not full boost of 1 bar, but maybe 1/3 to 1/2 bar. The exhaust tap is between the exhaust manifold and the turbo, where there is enough pressure to overcome the intake tract pressure.