zachosz wrote:Basically the bigger the A/R the more power you'll make, since the turbo will flow more air. So if you want better spool up and don't care for peak power i think the smaller housing would be ideal
Actually, the A/R has nothing to do with the size of the turbo itself. Only the nozzle. It is related to the airflow though, but not to a large extent. The size of the wheel and housing are more crucial, the A/R is more of a fine tune aspect of sizing. With a T3 turbine, spool-up won't be much of an issue anyways, so I'd opt for a higher A/R for better flow. But I tend to be biased to larger turbos anyways. You will only hate lag until it starts to boost. And lag is not as bad as you think....