Flyboy

the combination of those two, size and internal layout, when you look at the pressure loss curves for those two cores they track along very similarly for the (assumed) same mass airflow. The internal design of the RS4 core may offset the size advantage of the AWE core with respect to p-loss.

Assuming again that the conditions were the same for each test, I think it is very unlikely that you'd suddenly see the two lines diverge. That would mean that the overall resistance from the core, determined by the physical layout, would change. Maybe it's just that I'm failing to see how that could happen.

Hal_TT::CBP

a slight advantage up top on flow/pressure overall... AWE could have proven me wrong if their dataset included values over 6300 rpms, their kit makes peak(advertized) hp above that on both 93 and 100oct(or whatever Race is for AWE). Would only make sense to me to run the dataset for the entire rpm range. Maybe the test equiptment didn't allow for that, unsure. Guess that will remain unanswered until someone takes the time to test/document.

Think the primary interest in this thread for me is to dispell the supposed pressure loss advantage one has over the other.

S4mig@PEB tuning

shined above that RPM point. Conspiracy theories are great!