Contour Enthusiasts Group Archives Forums General Dyno and Drag New 2.5L Turbo Benchmark thanks to Chris!

I know he isn't using secondaries so why the drop in torque at the place where the secondaries normally open up?
I thought with full controll over the timing it would enhance that portion of the graph?
Maybe it is still the product of the manifold design having two efficient rpm ranges for air to flow well. If that is the case then having secondaries in or not is really not an issue since the actual manifold design with regard to tube length and diameter is the deciding factor. Probably the cams still have something to do with it too.