Quote:
Originally Posted by CanAutM3
True, "nothing" was a bit harsh. But it still offers very limited advances. The S55 also has electronic controlled wastegates as well as a water-to-air intercooling system. The revised compressor wheel (read bigger) is exactly what I said as being the main change. The only difference of significance is the higher injection pressures which should help with off boost throttle response.
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It sounds like there is also internal cooling advances which could make the S58 a more consistent performer when being driven hard for extended periods like a ring fastest lap.