TDIClub Enthusiast, Super Secret Diesel Ninja Vend
- Sep 16, 2003
- 96 B4v red \ 98 Mk3 green\98 Mk3 Jetta black\ 99 Mk4 Jetta green x2\ 99 Mk4 Golf silver x2\ 99 Mk4 Jetta black\ 97 B4 sedan green\04 JSW gold\03 JSW silver
It uses 1mm more lift at the cam, and slightly stiffer valve springs. The head is factory gas flowed....so yes, it breathes better.Good to hear that it uses better cams (and maybe better head also).
Sea level, 2.5bar (PR 3.5 compressor map), 45lbs, 75% efficiency, 180-185krpm, just edge of compressor map. 2.5bar is not enough for that power / flow.
First look that compressor map PR4 level (ideally 3bar boost at sea level)
Then think / calculate that situation when ambient pressure is 800mbar...