i dont use the handbrake to launch, i just have the clutch fully in and rev around 5.5 then when i see the green light, i ride the clutch ever so slightly until i feel its properly engaged then give it full throttle.
Is this an alright launch method?
is 20psi tyres on an awd car too soft?
the sub is coming out next run!

I think also i was shifting at the wrong points, i have a habit of taking it into 6.5, nearly 7 then shift. My dyno graph shows my peak power at ~5,600 rpm ..

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"Wrong fitment".