I thought that the acceleration would suffer, but it seems to be just the opposite. The power and acceleration are as good as ever. The one last thing I would like to tackle is the exhaust system. This spring I'm planning on changing the exhaust manifold and related components. Let me explain.
Engines are essentially big air pumps.
The more air it can pump through the more power it makes. The outlet of the exhaust manifold on the diesel engine is about an inch an a half across. Its quite restrictive. This would be consistent with VW's thinking when it comes to Buses. The original manifold from the GTI motor is about 2 inches.