This has been covered on many occasions, if you do a quick search of the tech section you should easily find some old threads dealing with this exact topic. The sticky at the top of the tech section covers almost 100% of this information. None of this information is new, people have been using sr20's since 1989 and successfully turbocharging ka's since the mid 90's. If you're posting threads like this that means you haven't taken the time to search or do any research yourself. Nobody is going to spoon feed you everything

If you want to learn more about ka and turbocharging capabilities I suggest reading:

www.ka-t.org :: View topic - Sticky: DOHC Turbo For Dummies

If you have any other questions about this topic, feel free to PM me I'd be more than happy to point you in the right direction.

A cautionary word of advice about ka-t.org, they have a very low tolerance for newbs and spam posting to raise post count and will more than likely ban you very quickly without a reason.