I run the standard height HS and I’ve had a devil of a time getting PLA to run at any reasonable speed. Performance has got worse after changing down to 0.35mm nozzles from 0.5mm (I wrecked the hot-end assembly).
PolyPlus and Verbatim PLAs will run ok at about 40mm/s with a very slow first layer.
Colorfabb PLA/PHA runs well at 60mm/s with acceptable results at 80mm/s on larger parts.
PolyMax gives mixed results. Orange is fantastic up to 80mm/s, Blue is so-so >40 and the quality of white seems to depend on wind direction outside…
Polysupport runs okay at 40mm/s.
Can’t get rigid.ink white to run at all.
The 0.5mm nozzles (old style with the pimple at the tip) would run large PolyMax parts quite merrily at 100-120mm/s, PolyPlus / Verbatim at 60 and give OK results with rigid.ink PLA at 40mm/s.
Note that these speeds are as set in S3D. No idea what was actually achieved by the machine.
Temperatures are always worth fiddling with. I always find that I have to run hotter than suggested by the datasheets (e.g. running Colorfabb PLA/PHA at 230C) - I presume this is something to do with the nozzle design. Running more rapidly also requires that I up the nozzle temp. I’ve also had to redesign the cooling fan shroud to deal with the increased temps otherwise undercooled areas of prints suffer from local thermal distortion.
Also running PET-G type materials now. They’re another bundle of uncertainty.