Touareg: 2007 R5 TDI
Join Date: May 2012
Second Vehicle: 2004 V10 TDI
Thanked 5 Times in 3 Posts
V6TDI's have a electronic actuator, don't know if you can retrofit a vacuum one.
You can make 400HP if you want.The only thing is that your turbo and engine will die after 10000km and your consumption will raise to 20L/100.
Stock fueling system is good for 30HP gain. You can go further but the injection time will take longer so the consumption and black smoke will increase.
You can raise your rail pressure, but your HPFP will wear earlier.
I wouldn't modify the rail pressure. Get bigger injector nozzles instead. Together with a good turbo system and remap, you'll be safe i think.