Turbo Detroit 8

[GLMFAA1]

Has anyone taken the turbo off the Cummins and plumb it on the Detroit 8?

greg

[Jim B]

I have not (yet), but I know you can get an 6V92T or 8V92T from Auslowe.

[KJ790]

I did it once. I took the V8 from a GMC astro kit, added a turbo from my parts box and dropped it into a snap kit Peterbilt 359. I will have to get some pictures later.

[fantacmet]

Turbo AND supercharger. Hrm.....................

Seen on a car before but never a rig. Good job on the plumbing.

[KJ790]

It was pretty common on the two stroke detroits. The supercharger was necessary for the engine to start (since air had to be forced into the engine right from the turn of the key), and the turbocharger was used to increase power. The turbo charged engines were designated with a "T" at the end (such as 8V92T). A "TA" on the end meant it had a turbo and was after-cooled.

[Fat Brian]

Michael, on a two stroke Detroit the supercharger functions a little differently than it does on a car. These engines don't have traditional intake valves in the cylinder head, the air comes in through holes in the cylinder wall that are uncovered when the piston is at the bottom of it's stroke. The supercharger actually pressurizes air passages in the block and the air rushing into the cylinder pushes the exhaust out instead of the piston rising again. This is called uniflow scavenging since the air travels in only one direction. These engines can't draw air like a four stroke because the only time the piston moves down is after a power stroke. The engines that only have a supercharger are considered naturally aspirated because the supercharger doesn't build boost and only supplies what would be atmospheric pressure inside the engine. It's a very interesting design for sure.