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      05-16-2011, 01:47 PM   #44
e90pilot
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Drives: E90 325i
Join Date: Jul 2005
Location: Oakland, CA

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Quote:
Originally Posted by Philritter21 View Post
The two wide set pipes are attached to airboxes at their ends. They feed the turbos. The narrow set piping takes the compressed air and sends it to the intercoolers.. and then on to the engine. There is no junction, it just looks like it because of the angle. Remember that the turbos are mounted on the topside of the engine.
Ok I get it now. I knew the turbos are on top but I was getting confused with the direction of airflow. Airflow comes in through the sides and out the middle. That "junction" I think is just the diverter valve. I keep forgetting that the whole thing is a reverse flow engine and the intake runners are where the exhaust headers would normally be.
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