i did a s5 T2 in my 1990 convertible. i put a cxracing fmic on, walbro 255 fuel pump, took off ps and ac, act stage 2 clutch, greddy type rs 2 bov and boot controller, fuel cut defenser, 8.5mm wires, custom 3

 

stock ecu? 230HP max.

 

+1

You need some sort of fuel management. Even an SAFC would be better than nothing.

I HIGHLY advise RTEK 2.1. It was released not too long ago, it's basically a full standalone for $400, unlimited potential...

Also, stock turbo becomes a flamethrower once you start pushing more than say, 12 psi?

-Richard-

 

With an ems, enough fuel and exhaust you can make close to 250whp at 12psi.