What size turbine housing for a GT2871?

a3mat

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I have an S3 8L 1.8T with a GT2871 setup currently running a T25 exhaust housing. I am going to change to an ATP cast manifold with v-band fittings, a custom made down pipe and a Garrett v-band turbine housing.

I would like to hear what A/R size housing people are running with a similar setup. This is my fun daily driver, options are 0.57 and 0.72.

I would think the smaller the better as it will spool quicker but would that ruin the top end power? As it's a daily I don't normally rev it to the limiter anyway, only coming onto motorways etc.
 
I assume you are going external wastegate then...

I'd go 0.64

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I assume you are going external wastegate then...

I'd go 0.64

<tuffty/>

Yes it already has an external waste gate but I will change to a 38mm Tial one as my current one is 2 bolt flange fitment.

Tial make a 0.64 exhaust housing too!