| From what I am seeing it appears to me that the turbine/housing combination and the flow restriction it produces has an effect to diminishing the benefits of a better flowing manifold at the power levels that this testing was performed within. The margin of difference shown here is within the margin of error and environmental variables, no doubt. The design of these manifolds came from the use of all the available resources of computational fluid dynamic modeling as well as 3D printing technology and grassroot flowbench testing... to produce a set of components that offered the absolute best of flow characteristics that can be achieved within the physical constraints of the Z32 engine/chassis and supporting hardware. What I would really like to see are the results of a setup using at least GTX29/GTX30 turbochargers in a comparison of performance between the MSP/AMS manifolds and the AshSPEC manifolds. The differences in the bench-tested flowrates are appreciable. From the results of your testing it appears that the manifolds can be "only so good" before the restriction of the turbine/housing section will become the bottleneck to performance. As the turbine/housing combination is changed to a higher-flowing setup, the difference in the manifold flowrate will more accurately dictate which manifold set is better.... and the flowbench numbers alone provide a certainty to to that result. These newer GTX29xx, GTX30xx, and the newer Gen2 GTX turbo generation just coming out.... can't wait to see what they will do strapped to a set of these manifolds.
Enthusiasts soon understand each other. --W. Irving.
Are you an enthusiast? If you are out to describe the truth, leave elegance to the
tailor.
Albert Einstein
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