OH MAN, this was a good thread until the wheel hp was mentioned. BS is not even the word for this. I have built a couple EA82T in the past and there is no way you are making that kind of power, NONE! There are so many issues to resolve in the EA82T before you can even get half that whp.OK let me see if i got this straight. You are using the stock flapper door? stock injectors? and stock turbo?? All of those are MAXED out at around 200 crank hp. Dude, have you ever compared your turbo to one that can actually make 280whp (vf30,34,22). I like your dyno slip post, WTF is that from, definitely not a 1.8l engine. You have 250ft lbs of torque at 2000rpms LOL LOL LOL with "big cams" no less. What dyno was this and what load variable were you using because the hp/tq failed to cross at 5200 rpms, not that it matters because the car dynoed was not turbocharged or even a subaru. Man you can fool some guys sometimes but please dont insult us.
You mention some ET's but failed to post MPH. ET is all about traction, MPH is about power, with 283whp 120MPH trap is not unreasonable. LOL
Just for kicks punch some numbers in here and see how much boost it will take to make 315hp with a 1.8l engine!
http://www.howstuffworks.com/framed.htm?parent=turbo.htm&url=http://www.turbofast.com.au/tfcalc.html Somewhere in the neighbor of 24 very efficient PSI
"The power increase on my motor is from 120hp to 283 which is only 163hp" Your car stock at best will put 90hp to the wheels, so that is 193hp gain WOW... LOL not bad! If you're gonna BS make it BIG!
Thanks Dennis for telling me about this link, I got a good laugh!