Originally Posted by Dave D.
I just noticed (using the 18g's best pull) that the hta68 has +9 average hp and +9 average torque through the powerband. I will be going full 3" soon for a fully valid comparison. Edit: now I see the 3%!
But the single pull on the HTA68, you have no idea where it lies in the distribution of "good pull" to "bad pull". In only 3 pulls on the 18g, you see over 4% difference. 3% can be considered in the noise until you see more pulls to more accurately pin down the average.
Can you tell that statistical analysis is part of my job?
Full 3" will help some, I guess we have to wait and see to determine just how much of these turbos are magic. I'll be surprised to see identical spool (as these two graphs clearly show) and 25HP peak difference, but we'll see. I'll gladly eat my words if the data shows it. That's the thing about a well thought out objective analysis, you can actually get people to change their minds.