AndyBees
Top Post Dawg
- Joined
- May 27, 2003
- Location
- Southeast Kentucky
- TDI
- Silver 2003 Jetta TDI, Silver 2000 Jetta TDI (sold), '84 Vanagon with '02 ALH engine
Yeah, I understood about the connections.....that's got me in a head scratching mood lately. My piping varies in size (both inside and outside obviously).
Here are the measurements, inside diameters!
Inlet at the Turbo - 1.5 inches (not an issue on the filter side)
Discharge at the Turbo - 1.08 inches
Pipe into the InterCooler - 1.62 inches
Pipe out of the IC - 1.62 inches
Inlet at the EGR - 1.7 inches
The Inlet and Outlet pipes on the TDI ALH InterCooler are both 2.25 inches (inside diameter).
I think the logic of the increase in diameter going away from the Turbo allows the Air Charge to slow down (expand) a bit (same pressure), thus better heat absorption in the piping, but more importantly, less "drag" as the air is pushed toward the IC and on to the Intake.
Here are the measurements, inside diameters!
Inlet at the Turbo - 1.5 inches (not an issue on the filter side)
Discharge at the Turbo - 1.08 inches
Pipe into the InterCooler - 1.62 inches
Pipe out of the IC - 1.62 inches
Inlet at the EGR - 1.7 inches
The Inlet and Outlet pipes on the TDI ALH InterCooler are both 2.25 inches (inside diameter).
I think the logic of the increase in diameter going away from the Turbo allows the Air Charge to slow down (expand) a bit (same pressure), thus better heat absorption in the piping, but more importantly, less "drag" as the air is pushed toward the IC and on to the Intake.