my experience
That fits well with my experience.
The cliffs notes version is:
As you make the compression more isothermal, the true operating point of the compressor moves to the left on the compressor map. Since most performance applications push the compressor off the compressor map on the right side as they try to squeeze the last bit of performance out of the turbo this is in most cases a good thing.
Here at high altitude, the already small TD04L-13G which comes stock on the WRX is not just operating off the compressor map, it is on the next page.
When I started with pre-compressor WI, it made the turbo much more responsive in the mid range, and improved the max airflow a small but noticable amount. The mid range rpm onset of boost became so agressive I had to modify my boost controller settings to keep the throttle from becoming an ON-OFF switch.
Larry
|