What A/R to Look for in a New Turbo

[Angry]

Hi guys

i'm doing a little investigation on a new turbo for my coupe, hopefully for install around june next year.

Anyways i'm not particular sure on what to look for, being a n00b and all.

I'm looking to buy a T3/T04 Garrett Spec Turbo with a 57 Trim and a 0.48 A/R internally wastegated ....i have a vague idea what it means but not a clue how it translates into where boost comes in and how much its rated at.

I'm looking to making up to 250rwkw in shootmode at 1.2bar at the MOST.

But being a daily i dont wanna have to rev the christ out of the ole red top to make boost..specially if i'm in peak hour traffic trying to get home. and being a Rb20 off boost theyre pretty sluggish at the best of times - to me anyways.

http://www.turbocalculator.com/compressor-...aps/t04e-57.jpg

my other options are GT25030 or GT28 .... but costs really get out of control and pretty much **** my budget.

If u can make any recommendations or help me out understanding all this .. i would greatly appreciate it.

Thanks

Matt

[INASNT]

From the compressor flow map and a/r size it is a very small turbo for the rb20.

At 1.2 bar the map shows it only flowing 250hp