I think if your going for a bigger turbo, the cams and the springs/retainers are going to help the top end power that the 50trim turbo or larger would provide. If you want to be high 11's and just want the car more street oriented, I would go with the 16g. On my evo (16g)you could hit 28psi, but by 7,500rpms it would be around 22psi...so no point revving to 8.5k... Also, a larger turbo will lag, but when it spools you will be spinning like crazy anyway. All just depends on what you want... good luck