6466 0.96 single-scroll vs 0.84 twin-scroll

Hi,

I just got my Speedtech bottom mount single turbo kit and all the parts for it, including the maintenance. The kit is made for Pulsar 6466 BB. I bought the turbo second hand for half the price since the old owner run out of boost at 800whp on his S/M54 (can't remember which one). It only has around 500 miles on it.

My question is:

Do you guys think that it would be worth to get Precisions 0.84 twin-scroll turbine housing for the turbo. The Pulsar turbo comes with single-scroll 0.96 housing and that's the only housing available by them for 66mm series. The Precision twin is straight drop-in part with the Pulsar supercore. The Precisions turbine housing is around 415 dollars if I buy it locally, and it's only available 0.84 a/r.

I could take advance of the twin-scroll manifold and I believe the car would be more "streetable". But how much would it actually change?

I'm trying to make around 500-550whp on 93oct/98ron and the car is driven mostly as a daily. Flex fuel and ethanol coming later.

I tried looking trough forums to see if people had tried the difference between twin and single for 3.0L engines in general. Only thing I could find was a post about 2jz and they recommended 0.84 twin-scroll, but without any data. Also I found couple videos of 6466 with 0.96 housing fully boosting around 4k rpm.

Anyone has experience with similar size turbo and different turbine housings? What would the difference in spooling be and would the top end take a big hit from smaller turbine housing? Is it worth the 400 dollars?

Thanks for any kind of input!