sure, but it doesn't appear to do anything below about 2300 RPM, which is kind of what we were talking about...while the power increase is decent at the 3500 RPM, it looks like it's way down at the top end (unless they simply shut the test off for some reason above those revs)...the drop off seems to happen around 4200 RPM and the max numbers show it's down 126 HP and about 74 TQ in the upper end.
You can tune it to open at ANY RPM you want....and tune the curve to how you want with all of these devices in play. Not the greatest plot...was just trying to show torque increase. Below plot is better.
The graph you see is set-up for racing, so no need for low RPM torque....but if that's what you want, you merely match the turbo and the tune. That's a whole other class....learning to read turbo compressor maps. Anyone interested?
Here's another plot...with a MASSIVE turbo (massive turbos aren't tuned for low end TQ, obviously!). No losses anywhere....Just plenty of torque goodness!
Turbo BMW M3. Large turbo. Turbo got to full boost 500RPM sooner, too. You guys get the idea....sky's the limit these days. But manufacturers play a big game of trade-offs (generally). You want more torque down low? Want more power up top? They (generally) like more torque down low and quicker spool (driveability issues)...so that means smaller turbos. Which means power suffers up top and drops off fast on these small displacement cars.
