Edit post

Edit your reply below.

Post Body
Enter your post below.
Non-turbocharged EMD diesel engines use two Roots-type blowers, gear driven off the crankshaft (only one is provided for the the 6-cylinder engine). The blower is necessary to scavenge exhaust gases from the cylinder: it supplies a large volume of air at a low pressure, about 4 psi. It's not enough pressure to provide a horsepower increase, and these are considered normally-aspirated engines, not supercharged in the sense you would find on a automobile. <br /> <br />If an EMD engine is turbocharged, it has no Roots blowers. The turbocharger supplies air at about 15-18 psi, increasing horsepower by 50% in the same displacement. The turbocharger is gear driven at low rpms; once exhaust flow builds to sufficient volume a clutch disengages the gear train and the turbo is freewheeling. <br /> <br />Alco and GE turbochargers run in the 18-26 psi range, as far as I know.
Tags (Optional)
Tags are keywords that get attached to your post. They are used to categorize your submission and make it easier to search for. To add tags to your post type a tag into the box below and click the "Add Tag" button.
Add Tag