I am thinking of upgrading to a small twin scroll Borg Warner and wondered how it might compare on spool up with a t34?

I have seen the smallest on goes up to 440bhp max so it would be that or maybe the next?

I am going to get Mark Shead to fit vipec first and then upgrade the turbo.

My BMW 1m engine is twin turbo and has really fast spool up, I would like to get closer to that. I have not seen any supercharger conversions, any thoughts.....

My yb is in my 4x4 pug 205. I believe I will need a big tooth box to handle the torque.