Originally Posted by m33
Jon I'm wondering if this is just opinion or if there's data to
back it up. I think we all want to see data at this point.
Here's what I've seen, and can give you data if interested (it's
been posted before): when we compare equal boost, there's no
comparison; the Vortech makes about the same (maybe a tiny bit
more) wtq and far more whp than the AA/HKS. But when we compare
equal whp, it's true that the HKS makes quite a bit more torque,
but at the cost of 2+ more PSI boost.
You might have seen that we had a recent drag event with both
kits. When you see the results on the drag strip, it's not even a
fair race. The ESS-VT1+meth beats AA/HKS-620+Meth; and the ESS
620 kits walked it.
Drag racing won't show the daily driving torque gains because drag racing rpm are above the daily driving rpm. It is not a massive torque gain, anyway, and as you note, more boost is required to make it because the HKS is a smaller, faster spinning impeller (which also means it peters out a little earlier).