Yup, I managed a 1:38.3x once with the 3:02.xx following.
But geeez, driving one successful stage is much more demanding, both physically and mentally, then a typical 10 lap race. Atleast for me
Even though most of the speed is up to the driver, how does your setup look like? My suspension is generally pretty soft with a 43% torque split and double clutch pack LSDs at 80/15, combined with a viscous at 20Nm. The hybrids are around 170kPa. Actually I have no idea how a good rallye setup looks like, I never bothered messing with them in RBR, other than making the gears longer for some stages.