stock turbo power limits om606
stock turbo power limits om606
If 240hp is your power goal, then you'll be able to do it with the stock turbo and get the best possible response.
I'd forget about a Holset if you want boost as early as possible, they are mostly designed for stationary engines and big heavy trucks. I'd rather use something like a Garrett GT2860 or GT3071 with a small exhaust side.