What HP is your turbo rated at? Where do you live in Perth, if you want to go for a drive in mine I'd be happy to take you, mine comes on boost pretty hard and doesn't have a problem lighting up the rears anywhere in 2nd gear. Simon did some small XFT tweaks on my F6 turbo and pushed 16psi to get my power of 358.8kw, as you can see by about 3200rpms its made full torque power. Some have gone 385kw with the same mods and in Autos, so mine was on the 'lower' scale of things Hope you get it sorted anyway, you are in good hands either way you go and it's a shame you didn't run your turbo choice past either of the guys that could of tuned it