Hahaha ah was that me taking off from the lights on South Road near the Old Noarlunga turn off? Yeah dude, I'm 90% sure it's the turbo oil seal. I've had the engine comp and leak down tested and it's all fine, no blowby, etc. The smoke only happens occasionally (like literally once a month) at random times under boost. It cleared up after making it to 3rd gear.
It's weird as. I'm not losing any oil, either. I can drive it under full boost and still no smoke. But every now and again, the smoke comes back! Ah. The collapsed centre muffler baffle doesn't help things, either.
Also spotted a black 34 GT going down South road near Morphette Vale. Sounded awesome.