rotarykid
Top Post Dawg
- Joined
- Apr 27, 2003
- TDI
- 1997 Passat TDI White,99.5 Blue Jetta TDI
They both have from the start had urea because they both came about after the Urea use rules were put into place from 2011 on.The 328d has a single twin scroll turbo. And there is no chance in hell that bmw 2L powerplant costs $10k more than the vw tdi powerplant. What about the gen 1 chevy cruze diesel? It's just as affordable as the tdi without resorting to cheating the regs. This seems like a circular argument- everyone is entitled to their opinion. But not all opinions are supported by the facts.
the chevy was from the start designed with urea because when it was first engineered the epa & carb had set in stone what was required to pass e-test & durability rules.
And bmw's twin scroll turbo is a multiple turbo setup, it is the very definition of a mulitiple turbo setup.....
BMW to save space & weight came up with this setup that uses a low mass fresh air small turbo turbine that is exclusively used for fast spinup at lower rpms. Then once the engine is running at speed the fresh air is diverted away from the low-speed low mass turbo to a second larger heavier mass fresh air turbine turbo for higher engine speeds.
I have to ask with you calling this a single turbo setup....Have you actually looked at one of these in the real world?
Have you ever replaced any turbo on anything, or similar to this setup?
Anyone who calls this a single turbo really has no understanding of what a single turbo setup is really like, in my opinion...My opinion which is based on working on & replacing turbos all the back to the really big heavy mass ones used on 911s in the 1970s....
This is a very expensive & extremely complex design with multiple fresh air turbines of different mass & sizes that has a design which when fails at current replacement costs today would exceed the value of a lower price vwag 2.0 CR offerings.....