The compressor map is just an estimate that quickly indicates if the wheel in question will work based on two factors. A map is not the end-all turbo-sizing tool. Turbonetics has a Turbo Match ...

Audi solves the problem of turbo lag another way entirely. It uses a small compressor, also powered by a 48-volt electrical system, to essentially "pre-charge" the existing conventional turbochargers.

In very simple terms, a larger turbocharger—with larger turbine and compressor wheels—can force more air into an engine, making more power, but the bigger you go in turbo size, the longer it ...