Turbonetics t3/t04e 57 mm (old turbo) vs BW SXE364 64 mm. With the new engine set up (gtr crank, plazmaman intake, hks drop in cams, standard rb25 head) the new turbo is as responsive as the smaller one with 200+ hp at the same boost level. The little turbonetics peaked out at 410 rwhp on 21 psi. The Bw has gone 480 @ 14 psi, 550 @ 17psi and 708 at 27 psi. Both are journal bearing oil cooled turbos.