Originally posted by ButtonPuncher:
If I do ditch the T3-S60, I'll probably go with a GT3071R. Check out the map


You are reading those lines completely wrong. You can't just follow one line up. The turbo does not start out making it's maximum boost. Boost (compressor speed) is exhaust energy dependant and the little 2L is not going to spool up that huge compressor very fast.

I mean seriously. The GT30 is freaking HUGE for a 2L engine. Sure you'll make boat loads of power on the top end if you can spin those rpm and stay together but it will lag like a biotch! I would not expect it to spool until past 4500rpm. You will be surging at low rpms too. That's not good for the compressor. Power under the curve will suck!

If you look at that map you can tell that turbo is designed to run in the 20-30psi range. ~1 bar/15psi is the bottom of it's efficiency range.

Like I said. You need someone to size the turbo for you because you are not getting the whole picture. The S60 is a good choice for overall power. Stick with it.

2000 SVT #674 13.47 @ 102 - All Motor! It was not broke; Yet I fixed it anyway.