Originally Posted by reid-o
The gains should be everywhere for a given psi of inlet pressure, less energy required to achieve a specific shaft speed, lower overall egbp and less turbulence from the reduced bends. You just may not see it with this turbo and only torque as the indicators. The engine should be happier which is not to say its not unhappy in the stock location.
Plus one of the competing theories about the value of features like split pulse is the increased total volume from running two long secondaries to the stock location. One could argue that the increased volume would limit the effect. The idea is not so much low mount as it is reduced header volume while increasing efficiency. It just so happens that most designs will put the collector closer to the ports.
I agree with you Reid but the results Chris has posted of the 3071 are not impressive in spool characteristics and HP. Maybe it's the tune but the gains in spool and response will be bigger with bigger turbos because of the efficiency in the design and volume. My 58 lb stock location turbo acts like a VF on steroids with the Holy header. I think I have a good balance of stuff in my build, you can ask Junior about that. I'm not trying to discourage or discounts what Chris is doing, it's all good but it will get better with bigger turbos!