Background: The last post discussing the tuning of the Shuenk IS48 turbocharger addressed the effort to push the compressor into surge by rapidly increasing the target boost pressure at low engine speeds. With that behind me, I turned to increasing the boost pressure at the top end, approaching the redline, to learn how the turbocharger […]

Background: After a couple of check-out drives with the Shuenk IS48, the process of tuning the ECU got underway with Russell Road and Racing. Since the version of the IS48 turbo that I have includes an anti-surge compressor housing, the first goal is to see if it can be pushed into surge. This post discusses

Background: With the Shuenk IS48 turbocharger installed, I flashed the ECU with a tune I had previously used with the Lader LM440 IS20 turbocharger. The turbochargers are similar enough that the lower boost tune should suffice for verifying that the turbo installation went correctly. I did find a part that was not installed fully, the