Area to Radius ratios on my turbo.

[ZORT]

Guys before I go further in my turbo setup I am trying to understand what the turbo that i have will do for me:
on the compressor housing i have a .42 A/R and on the turbine i have a .48. Now what does this mean.

And how do these spec relate to a t3 turbo or a t3/t4. From what I have understood so far the .42 on the compressor housing mean that I may spool pretty fast leaving no room for when my cams really get alive a 5000 to 7200. is that correct.. help

[pvang31019]

what motor do you have? Is that a saab turbo?

[ZORT]

I gota ZC engine. I don't think it is a saab turbo since all we get here are japanese parts.