I'll let the dyno slips do all the talking. Note how early the 3RZ develops its torque band. It's no slouch at the bottom end. So it's torque may peak around 4000 rpm, but what's important for your question, is look how approximately 85% of that peak torque is available at around 1700 RPM:
(Here is Bevin's dyno from his 2003 3RZ)
This is a 1996 3RZ vs. a 1986 22R-E. When this 3RZ was dyno'd, the ECU was still learning what was going on because we did the engine swap and then trailed the truck straight to the dyno shop. So this 3RZ was still in open loop.
Notice how this 3RZ's torque peaks at just 2350-2400 rpm. In case about 87% of the torque is available at 1850 RPM:
