replied to the thread My "fast car" journey leading up to my ~1000 awhp GTR "build" gunning for 8s and "no" lag
" Yeah, I saw that testing. Most of the other testing I have seen has shown otherwise, that the comparably sized EFR turbo will perform better in spool and response (particularly on the street) than its Garrett counterpart. It's not a "free" lunch per se since the standard IHI turbine wheel weighs in at 0.135kg. The significantly larger gamma ti EFR turbine wheel only weighs 0.150kg. For reference a Garrett turbine wheel of a similar size weighs 0.255kg making the EFR part over 40% lighter.
On another setup less optimized than mine will be, (no 4" exhaust, no head work, mild cams v. moderate, pump not E85), 1 bar of boost was achieved on the dyno by 2700 RPM. That's equal to or better than the stock turbos. Apparently, the visceral feel of the spool on the street is even more dramatic.
Obviously, it's all just bits of data and lots of speculation at this point, but I am very optimistic. I will be posting Vbox data, timeslips, dynos, etc. Nothing to hide here. "
Today, 09:10 AM