Quote:
Originally Posted by LuckyX2
The turbine on the G25-660 is only 85% the size of the EFR7163 and the compressor is 94% the size yet it flows the same. Efficiency is 79% vs 74% on the EFR. Hands down, Garrett's turbine/compressor aero is better. The only thing keeping the EFR competitive is the TiAl turbine material, if Garrett made a TiAl version of the G25-660 it'd be no contest.
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Tial wheels necessitate a different design due to strength characteristics, and let’s not forget about the mixed flow wheel, which does bring the turbo online faster. Efr’s also have the built in recirc valve and a cost advantage at this point. Garrett definitely has built what seems to be some fantastic competition here though!
I’m excited for further products in the G-series line. The next step up in turbine size is going to get real rowdy!