0-100km/h time with APR Stage 1 tune?

[bakersdelight]

hi all,

My 08 GTI is chipped with APR Stage 1, with other minor supporting mods including APR D1 diverter valve, PD160 and K&N drop-in filter. Have recently changed oil (Mobile 0-40W) and spark plugs (Bosch FR7KPP33+)

I have timed my 0-100km time using a bluetooth OBDII dongle and android Torque app, I consistently get between 7.4-7.7s.

I get off the line with stability control off, slipping the clutch at around 2,500RPM, change to 2nd at about about 5,500 to 6,000RPM and rev out the 2nd gear to reach 100.

Other forum members with APR Stage 1 tune and similar mods have reported their 0-100km/h time at 6.5s, which is significantly quicker than my 7.4s...

Is there something wrong with my technique or car? I don't think I have boost leak, as the boost holds consistently at around 16 to 17 PSI under full throttle (although it does take a couple of second to get there after putting the foot down, which i assume is normal)....

any advice? Thanks!!