Quote:
Originally Posted by COcyclist
This is an amazing project on so many levels! Thank you for sharing your build. The waste solvent system would be groundbreaking on its own but coupled with the compound turbo system, you have found the Holy Grail. You achieved better fuel efficiency combined with massive power increases. Incredible.
Let me see if I have this right. Exhaust gas drives the big turbo which empties into a downpipe which flows to the small turbo to spin it. However, the intake air travels back to the small turbo first though and through its own small intercooler and into the big turbo and through a FMIC (Front Mounted Intercooler) and into the intake manifold for the engine. I suppose the small turbo has a waste gate to keep from being overspun at high boost?
I love my TDI for the power when I want it and the efficiency the rest of the time but you have seriously raised the bar.  |
Thanks!!!
On my compound system the small turbo is connected to the head, it gets the exhaust first, once the small turbo reaches its set boost level the 44 mm wastegate opens and starts by passing the small turbos turbine. Both the exhaust gas going through the small turbine and around the turbine through the wastegate get dumped into the down pipe that goes under the car and feeds the large turbo turbine inlet. The large turbo has a wastegate that opens when it reaches the set boost pressure, and then dumps to the atmosphere.
The large turbo is the first turbo to get atmosphere air at its compressor inlet. It then compresses the air and runs through the first stage intercooler then out to the large turbos charge pipe that goes under the car and back up to the small turbos inlet, where the air gets compressed again from the small turbo. The small turbo outlet goes to the front mount intercooler then feeds into the engine.
The large turbo thinks its feeding a 4.0L engine or bigger depending on the boost level.
The small turbo thinks its anywhere from 0' to 15000' below sea level.
The waste solvent system is still amazing me. I'm up to 75% waste solvent now and its working great at this point.
I need to start getting it ready for the winter now and install the wipers and rear inner fenders.