i have had -5's for the last 2 years and i think they are great, dont think the spool up is slow at all and the power is great for a road car
1.5 bar is giving me 600hp at the fly with 480 lb/ft,
i never tried to wind it up to 1.9bar like kismetcaptain but i expect its pretty mad as the difference between 1.1 and 1.5 is HUGE in the way it feels when it takes off
however now im used to it i want more...