The engine is going together just fine. With the short block together, and the new turbo here, and it's huge.
This new KERMA turbo is 46mm, and is Bigger than anyone has ever done on a stock VW TDI frame.
The problem is that with these variable turbo’s, even with the vanes wide open to reduce turbine speed the exhaust drive pressure is still a huge problem.
This is mostly unknown to people running VW’s for the same reason that people in the truck world, lack of data. The most important tool in my toolbox is a data logger. I use the RPM performance Data logger
RPM Performance Racing Electronics, Data Loggers Systems, Sensors, Nitrous system 405 495 0454 Randy .
I noticed these problems, and addressed this on the new engine. Big turbo’s can become more manageable when you adjust the passive displacement of the engine How do you do this? First, you in increase the airflow, with improved ports, and cam design. Geoff at Colt Cams
Colt Cams - custom camshaft grinding has made huge gains in the TDI cam design, even fixing the problem with the PD cams that seem to self destruct at about 100,000 miles. These cams are available exclusively at KERMA TDI
My title 877 537 6283. The air flow improvement make the turbo see a bigger engine.
Next I addressed the excessive drive pressure , and this is available with this new turbo , the cooler EGTS reduced back pressure, and retained heat in the engine will allow the TDI to make inexcess of 200 hp per liter .
The tuning is essential as well, and Kerma has this down pat, Charlie at KERMA is one of the best tuners in the world on TDI. And I recommend his if your wanting to have true custom tunes.
We are getting ready for Hot Rod’s Drag week, and once again being the fastest true street driven TDI in the world. As in every other claimed street machine, this event puts the rubber to the road. No trailer queens, this is 5 days 5 tracks and 1500 miles. Over half of the entry’s do not finish the event.