Hey guys I've already read the thread (the one in the FAQ) that explains how to read compressor maps and the one explain A/R. However I'm still confused on how to choose a turbo for my car.

I'd like to run somewhere around 10-15psi and make around 250whp on my Accord f22b2 . I did the calculations for 12psi with intake air at 130ºF and got this

3000 rom 12.15 lb/min
4500 rpm 18.23 lb/min
6000 rpm 24.29 lb/min

It looks like a 60 trim t3 would be good assuming I did my math right. My question is how do I know what A/R to choose?

 

depending on what car this is going in, assuming an accord, that the f22 motors have some decent amount of torgue, could think about going with a Precision sc series turbo, you can use your bottom end, maybe build it alittle then have the boost alittle later and pull you through till almost redline. once your past first gear and on the throttle you wont have much lag and it will be a monster track car and or highway car

 

Yeah, I was thinking about a sc50 so I would have room for upgrade since everyone says, "once you boost you'll always want more boost" or something like that. It would give me plenty of room for upgrades, but I'm a little worried about spool time on this since I'll be shifting at a little over 6k.