RR-Vliet

Bought an Octavia 3 1.2 TSI with 190.000km on the odo and oil consumption of 1L every 4.000km. I had it tuned to stage one, but this barely improved the power. Furthermore, there was a lot of detonation. My tuner changed the stage one map to fix these issues but the power never came. His conclusion was that the intake tract was completely gunked up. The oil consumption got worse over time untill it hit 1L every 1200km this summer. I contacted Biggelaar Motorservice in Nuenen (The Netherlands) to fix my oil consumption (https://www.biggelaar-service.nl/). He also installed a new hybrid turbocharger which I bought through my tuner, Rica Engineering Wateringen (https://rica.nl/nl/). When Biggelaar opened up the motor the damage was obvious. A completely gunked up intake tract, 8 burned up exhaust valves, 3 bent connecting rods and a lot of carbon deposits. Biggelaar replaced the exhaust valves for 8 new ones, installed 4 new and modified pistons with upgraded oil scrape rings and replaced the bent connecting rods for new ones. Unfortunately we couldn't find any upgraded connecting rods for the 1.2 TSI. He also installed a hybrid turbocharger which I brought along. This turbocharger was purchased through my tuner Rica Engineering. After doing a good 1000km (easy going, letting the new rings settle etc. etc.) I went back to the tuner to get the hybrid turbo mapped. The first run showed that the stage 1 map with the hybrid turbo only delivered 124hp. This is due to the changes that my tuner made to the stage 1 map when we found out that my car was detonating. After a lot of back and forth the tuner finally got the lambda values where he wanted them. He then started feeding in the power. As you can see on the dynograph below (the final result) the turbo shoots up to 1.1 / 1.15 bar as quickly as possible at 2200 rpm. After that, the turbo pressure build-up is slowed, to reach a maximum of +/- 1.4/1.5 bar at 3200 rpm. This slower pressure build-up (hopefully) prevents the connecting rods from bending again. 'The internet' says these connecting rods can handle 280nm, my tuner indicated that he could achieve that if we let the torque hit full force at 2200-2400 rpm. Because of my previous experience with these 1.2 connecting rods I didn't want to push it, so my tuner kept max torque below 260nm and spread the torque out over a greater area. That doesn't take away from the fact that the car now drives really nicely, these power figures work very well for this 1150kg car.